5:37 a.m.
I too use an Intuos tablet but I disabled the touch feature because I hate it. I hope
modest stylus users like myself won't be forgotten.
Cheers,
JFL
6:25 a.m.
New subject: Update to window rotation.
On Tue, 2017-03-21 at 21:37 +0100, Jean-François Lemaire wrote:
I too use an Intuos tablet but I disabled the touch feature because
I
hate it. I hope modest stylus users like myself won't be forgotten.
I'm an Intuos3 user myself, I'd be digging in the code if I was
adversely effected so don't worry. We've got a fairly wide use of
hardware among the developers.
But considering what we have here. It might be useful to see if that
damn touch strip thing is good for anything. Rotation could be useful
but I suspect it'd have to be mapped in the buttons.
Best Regards, Martin Owens
8:29 p.m.
New subject: Canvas rotation and flip update.
Hi,
I've just checked in code to quickly preview canvas rotation. Like
Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It lacks
all the fancy graphics of Jabier's version. Some of this can be added
back if there is user demand. There is certainly some tweaking to do.
I also implemented canvas flip (Horizontal and Vertical). This is not
in the GUI yet. Flipping can be bound to keys (not done by default
since there are few keys free).
So here is a summary of what you can do:
* Rotate canvas
- Via GUI spin-entry box:
* Directly enter a number.
* Mouse up/down to change by ±1°.
* Click on + or − to change by ±1°.
* Left click to open pop-up.
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Rotate Clockwise (Recommended: 'Shift-(')
- Rotate Counter-Clockwise (Recommended: 'Shift-)')
- Rotate 0 (Recommended: '0')
* Uses /options/rotateincrement/value for step size if set.
- Via Ctrl-Middle-Mouse-Button.
Drag cursor keeping Middle-Mouse-Button down to rotate.
Release mouse button to end.
* No auxilary key: ±1°.
* Shift: ±15°.
* Alt: arbitrary rotation.
* Shift + Ctrl: reset to zero.
* Flip canvas
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Flip Horizontal (Recommended: 'Shift-H')
- Flip Vertical (Recommended: 'Shift-V')
- Flip None
Tav
3:24 a.m.
New subject: Canvas rotation and flip update.
Great work!
On Thu, 2017-03-30 at 13:29 +0200, Tavmjong Bah wrote:
Hi,
I've just checked in code to quickly preview canvas rotation. Like
Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It lacks
all the fancy graphics of Jabier's version. Some of this can be added
back if there is user demand. There is certainly some tweaking to do.
I also implemented canvas flip (Horizontal and Vertical). This is not
in the GUI yet. Flipping can be bound to keys (not done by default
since there are few keys free).
So here is a summary of what you can do:
* Rotate canvas
- Via GUI spin-entry box:
* Directly enter a number.
* Mouse up/down to change by ±1°.
* Click on + or − to change by ±1°.
* Left click to open pop-up.
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Rotate Clockwise (Recommended: 'Shift-(')
- Rotate Counter-Clockwise (Recommended: 'Shift-)')
- Rotate 0 (Recommended: '0')
* Uses /options/rotateincrement/value for step size if set.
- Via Ctrl-Middle-Mouse-Button.
Drag cursor keeping Middle-Mouse-Button down to rotate.
Release mouse button to end.
* No auxilary key: ±1°.
* Shift: ±15°.
* Alt: arbitrary rotation.
* Shift + Ctrl: reset to zero.
* Flip canvas
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Flip Horizontal (Recommended: 'Shift-H')
- Flip Vertical (Recommended: 'Shift-V')
- Flip None
Tav
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12:35 p.m.
New subject: Canvas rotation and flip update.
Hi Tav,
On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
Hi,
I've just checked in code to quickly preview canvas rotation. Like
Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It lacks
all the fancy graphics of Jabier's version. Some of this can be added
back if there is user demand. There is certainly some tweaking to do.
I also implemented canvas flip (Horizontal and Vertical). This is not
in the GUI yet. Flipping can be bound to keys (not done by default
since there are few keys free).
So here is a summary of what you can do:
* Rotate canvas
- Via GUI spin-entry box:
* Directly enter a number.
* Mouse up/down to change by ±1°.
* Click on + or − to change by ±1°.
* Left click to open pop-up.
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Rotate Clockwise (Recommended: 'Shift-(')
- Rotate Counter-Clockwise (Recommended: 'Shift-)')
- Rotate 0 (Recommended: '0')
* Uses /options/rotateincrement/value for step size if set.
- Via Ctrl-Middle-Mouse-Button.
Drag cursor keeping Middle-Mouse-Button down to rotate.
Release mouse button to end.
* No auxilary key: ±1°.
* Shift: ±15°.
* Alt: arbitrary rotation.
* Shift + Ctrl: reset to zero.
* Flip canvas
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Flip Horizontal (Recommended: 'Shift-H')
- Flip Vertical (Recommended: 'Shift-V')
- Flip None
Thank you very much for the work. The shortcut keys are great now :)
--
Raghavendra Kamath
Illustrator
raghukamath.com
8:27 p.m.
New subject: Canvas rotation and flip update.
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:
https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
*I couldn't figure out how to set the rotation, zoom, and offset using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
*had to roll back r15548 or else touch screen events get lost somehow.
* I couldn't figure out how to use the GTK gesture classes (which are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
-Yale
On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
<raghu@...3496...> wrote:
Hi Tav,
On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
>
> Hi,
>
> I've just checked in code to quickly preview canvas rotation. Like
> Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It lacks
> all the fancy graphics of Jabier's version. Some of this can be added
> back if there is user demand. There is certainly some tweaking to do.
>
> I also implemented canvas flip (Horizontal and Vertical). This is not
> in the GUI yet. Flipping can be bound to keys (not done by default
> since there are few keys free).
>
> So here is a summary of what you can do:
>
>
> * Rotate canvas
> - Via GUI spin-entry box:
> * Directly enter a number.
> * Mouse up/down to change by ±1°.
> * Click on + or − to change by ±1°.
> * Left click to open pop-up.
> - Via Key shortcut
> * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> - Rotate Clockwise (Recommended: 'Shift-(')
> - Rotate Counter-Clockwise (Recommended: 'Shift-)')
> - Rotate 0 (Recommended: '0')
> * Uses /options/rotateincrement/value for step size if set.
> - Via Ctrl-Middle-Mouse-Button.
> Drag cursor keeping Middle-Mouse-Button down to rotate.
> Release mouse button to end.
> * No auxilary key: ±1°.
> * Shift: ±15°.
> * Alt: arbitrary rotation.
> * Shift + Ctrl: reset to zero.
>
> * Flip canvas
> - Via Key shortcut
> * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> - Flip Horizontal (Recommended: 'Shift-H')
> - Flip Vertical (Recommended: 'Shift-V')
> - Flip None
Thank you very much for the work. The shortcut keys are great now :)
--
Raghavendra Kamath
Illustrator
raghukamath.com
------------------------------------------------------------------------------
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8:35 p.m.
New subject: Canvas rotation and flip update.
A few more notes:
*GTK3 for Windows doesn't support touch events yet. I have a patch and
submitted it:
https://bugzilla.gnome.org/show_bug.cgi?id=776568
*On GNU/Linux, I had to turn off the Wacom driver's internal gesture
recognition or else no touch events will be sent to the app.
xsetwacom --set "device" Gesture Off
On Sat, Apr 22, 2017 at 4:27 AM, Yale Zhang <yzhang1985@...400...> wrote:
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:
https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
*I couldn't figure out how to set the rotation, zoom, and offset using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
*had to roll back r15548 or else touch screen events get lost somehow.
* I couldn't figure out how to use the GTK gesture classes (which are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
-Yale
On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
<raghu@...3496...> wrote:
> Hi Tav,
>
> On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
>>
>> Hi,
>>
>> I've just checked in code to quickly preview canvas rotation. Like
>> Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It lacks
>> all the fancy graphics of Jabier's version. Some of this can be added
>> back if there is user demand. There is certainly some tweaking to do.
>>
>> I also implemented canvas flip (Horizontal and Vertical). This is not
>> in the GUI yet. Flipping can be bound to keys (not done by default
>> since there are few keys free).
>>
>> So here is a summary of what you can do:
>>
>>
>> * Rotate canvas
>> - Via GUI spin-entry box:
>> * Directly enter a number.
>> * Mouse up/down to change by ±1°.
>> * Click on + or − to change by ±1°.
>> * Left click to open pop-up.
>> - Via Key shortcut
>> * Inkscape Preferences->Interface->Keyboard Shortcuts, View
>> - Rotate Clockwise (Recommended: 'Shift-(')
>> - Rotate Counter-Clockwise (Recommended: 'Shift-)')
>> - Rotate 0 (Recommended: '0')
>> * Uses /options/rotateincrement/value for step size if set.
>> - Via Ctrl-Middle-Mouse-Button.
>> Drag cursor keeping Middle-Mouse-Button down to rotate.
>> Release mouse button to end.
>> * No auxilary key: ±1°.
>> * Shift: ±15°.
>> * Alt: arbitrary rotation.
>> * Shift + Ctrl: reset to zero.
>>
>> * Flip canvas
>> - Via Key shortcut
>> * Inkscape Preferences->Interface->Keyboard Shortcuts, View
>> - Flip Horizontal (Recommended: 'Shift-H')
>> - Flip Vertical (Recommended: 'Shift-V')
>> - Flip None
>
> Thank you very much for the work. The shortcut keys are great now :)
>
>
> --
> Raghavendra Kamath
> Illustrator
> raghukamath.com
>
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Inkscape-devel mailing list
> Inkscape-devel(a)lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/inkscape-devel
9:04 p.m.
New subject: Canvas rotation and flip update.
Looks nice.
I'll try to set some time aside next week to have a good look at the
code and hopefully merge it.
Tav
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:
https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
*I couldn't figure out how to set the rotation, zoom, and offset
using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine
matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
*had to roll back r15548 or else touch screen events get lost
somehow.
* I couldn't figure out how to use the GTK gesture classes (which are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes
weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
-Yale
On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
<raghu@...3496...> wrote:
> Hi Tav,
>
> On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
> >
> > Hi,
> >
> > I've just checked in code to quickly preview canvas rotation.
> > Like
> > Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It
> > lacks
> > all the fancy graphics of Jabier's version. Some of this can be
> > added
> > back if there is user demand. There is certainly some tweaking to
> > do.
> >
> > I also implemented canvas flip (Horizontal and Vertical). This is
> > not
> > in the GUI yet. Flipping can be bound to keys (not done by
> > default
> > since there are few keys free).
> >
> > So here is a summary of what you can do:
> >
> >
> > * Rotate canvas
> > - Via GUI spin-entry box:
> > * Directly enter a number.
> > * Mouse up/down to change by ±1°.
> > * Click on + or − to change by ±1°.
> > * Left click to open pop-up.
> > - Via Key shortcut
> > * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> > - Rotate Clockwise (Recommended: 'Shift-(')
> > - Rotate Counter-Clockwise (Recommended: 'Shift-)')
> > - Rotate 0 (Recommended: '0')
> > * Uses /options/rotateincrement/value for step size if set.
> > - Via Ctrl-Middle-Mouse-Button.
> > Drag cursor keeping Middle-Mouse-Button down to rotate.
> > Release mouse button to end.
> > * No auxilary key: ±1°.
> > * Shift: ±15°.
> > * Alt: arbitrary rotation.
> > * Shift + Ctrl: reset to zero.
> >
> > * Flip canvas
> > - Via Key shortcut
> > * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> > - Flip Horizontal (Recommended: 'Shift-H')
> > - Flip Vertical (Recommended: 'Shift-V')
> > - Flip None
>
> Thank you very much for the work. The shortcut keys are great now
> :)
>
>
> --
> Raghavendra Kamath
> Illustrator
> raghukamath.com
>
> -----------------------------------------------------------------
> -------------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Inkscape-devel mailing list
> Inkscape-devel(a)lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/inkscape-devel
-------------------------------------------------------------------
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4:16 a.m.
New subject: Canvas rotation and flip update.
That's amazing Yale! Can't wait to use Inkcape in a tablet in the near
future to test this new gestures.
Cheers.
--Victor Westmann
2017-04-22 5:04 GMT-07:00 Tavmjong Bah <tavmjong@...8...>:
Looks nice.
I'll try to set some time aside next week to have a good look at the
code and hopefully merge it.
Tav
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
> Rotate should be useful. I think most people find it easier to draw
> vertical lines than horizontal since there's less wrist motion.
>
> I've updated my touchscreen code to support canvas rotation. Anyone
> want to use it?
>
> https://youtu.be/-8v1EVKqcaM
>
> transform math:
> https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
>
> A couple of notes:
> *awkward coordinate system - Why is the canvas completely off the
> screen when rotation=0, offset=0? It seems the window's Y axis points
> down while the document's Y axis points up?
>
> * why is a positive rotation counter clockwise? In a left handed
> coordinate system, it should be clockwise.
>
> *I couldn't figure out how to set the rotation, zoom, and offset
> using
> the functions in the desktop class (scroll_to_point(),
> zoom_absolute_keep_point() and had to access the private affine
> matrix
> directly. Calling those functions in sequence seems to add unwanted
> offsets on top of each other instead of letting me set the offset
> directly.
>
> *had to roll back r15548 or else touch screen events get lost
> somehow.
>
> * I couldn't figure out how to use the GTK gesture classes (which are
> probably more robust), so wrote my own code for detecting zoom,
> rotate, and scroll gestures. When I tried, the gesture classes
> weren't
> receiving any events. 2nd, it seems only 2 finger rotation and zoom
> gestures are recognized, but not 2 finger scrolling. There is a 1
> finger scroll gesture.
>
> -Yale
>
> On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
> <raghu@...3496...> wrote:
> > Hi Tav,
> >
> > On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
> > >
> > > Hi,
> > >
> > > I've just checked in code to quickly preview canvas rotation.
> > > Like
> > > Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It
> > > lacks
> > > all the fancy graphics of Jabier's version. Some of this can be
> > > added
> > > back if there is user demand. There is certainly some tweaking to
> > > do.
> > >
> > > I also implemented canvas flip (Horizontal and Vertical). This is
> > > not
> > > in the GUI yet. Flipping can be bound to keys (not done by
> > > default
> > > since there are few keys free).
> > >
> > > So here is a summary of what you can do:
> > >
> > >
> > > * Rotate canvas
> > > - Via GUI spin-entry box:
> > > * Directly enter a number.
> > > * Mouse up/down to change by ±1°.
> > > * Click on + or − to change by ±1°.
> > > * Left click to open pop-up.
> > > - Via Key shortcut
> > > * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> > > - Rotate Clockwise (Recommended: 'Shift-(')
> > > - Rotate Counter-Clockwise (Recommended: 'Shift-)')
> > > - Rotate 0 (Recommended: '0')
> > > * Uses /options/rotateincrement/value for step size if set.
> > > - Via Ctrl-Middle-Mouse-Button.
> > > Drag cursor keeping Middle-Mouse-Button down to rotate.
> > > Release mouse button to end.
> > > * No auxilary key: ±1°.
> > > * Shift: ±15°.
> > > * Alt: arbitrary rotation.
> > > * Shift + Ctrl: reset to zero.
> > >
> > > * Flip canvas
> > > - Via Key shortcut
> > > * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> > > - Flip Horizontal (Recommended: 'Shift-H')
> > > - Flip Vertical (Recommended: 'Shift-V')
> > > - Flip None
> >
> > Thank you very much for the work. The shortcut keys are great now
> > :)
> >
> >
> > --
> > Raghavendra Kamath
> > Illustrator
> > raghukamath.com
> >
> > -----------------------------------------------------------------
> > -------------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > _______________________________________________
> > Inkscape-devel mailing list
> > Inkscape-devel(a)lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/inkscape-devel
>
> -------------------------------------------------------------------
> -----------
> Check out the vibrant tech community on one of the world's most
> engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> _______________________________________________
> Inkscape-devel mailing list
> Inkscape-devel(a)lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/inkscape-devel
------------------------------------------------------------
------------------
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noon
New subject: Canvas rotation and flip update.
Well, I built on what Jabier and Tav did, so hats off to them too.
I just realized even Krita doesn't have canvas rotation (Autodesk
Sketchpad is the only other program I know). Good to be ahead of Krita
for once (and all the fancy Qt, VC SIMD libraries they use)!
On Sat, Apr 22, 2017 at 12:16 PM, Victor Westmann
<victor.westmann@...400...> wrote:
That's amazing Yale! Can't wait to use Inkcape in a tablet in
the near
future to test this new gestures.
Cheers.
--Victor Westmann
2017-04-22 5:04 GMT-07:00 Tavmjong Bah <tavmjong@...8...>:
>
>
> Looks nice.
>
> I'll try to set some time aside next week to have a good look at the
> code and hopefully merge it.
>
> Tav
>
>
> On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
> > Rotate should be useful. I think most people find it easier to draw
> > vertical lines than horizontal since there's less wrist motion.
> >
> > I've updated my touchscreen code to support canvas rotation. Anyone
> > want to use it?
> >
> > https://youtu.be/-8v1EVKqcaM
> >
> > transform math:
> > https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
> >
> > A couple of notes:
> > *awkward coordinate system - Why is the canvas completely off the
> > screen when rotation=0, offset=0? It seems the window's Y axis points
> > down while the document's Y axis points up?
> >
> > * why is a positive rotation counter clockwise? In a left handed
> > coordinate system, it should be clockwise.
> >
> > *I couldn't figure out how to set the rotation, zoom, and offset
> > using
> > the functions in the desktop class (scroll_to_point(),
> > zoom_absolute_keep_point() and had to access the private affine
> > matrix
> > directly. Calling those functions in sequence seems to add unwanted
> > offsets on top of each other instead of letting me set the offset
> > directly.
> >
> > *had to roll back r15548 or else touch screen events get lost
> > somehow.
> >
> > * I couldn't figure out how to use the GTK gesture classes (which are
> > probably more robust), so wrote my own code for detecting zoom,
> > rotate, and scroll gestures. When I tried, the gesture classes
> > weren't
> > receiving any events. 2nd, it seems only 2 finger rotation and zoom
> > gestures are recognized, but not 2 finger scrolling. There is a 1
> > finger scroll gesture.
> >
> > -Yale
> >
> > On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
> > <raghu@...3496...> wrote:
> > > Hi Tav,
> > >
> > > On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
> > > >
> > > > Hi,
> > > >
> > > > I've just checked in code to quickly preview canvas rotation.
> > > > Like
> > > > Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It
> > > > lacks
> > > > all the fancy graphics of Jabier's version. Some of this can be
> > > > added
> > > > back if there is user demand. There is certainly some tweaking to
> > > > do.
> > > >
> > > > I also implemented canvas flip (Horizontal and Vertical). This is
> > > > not
> > > > in the GUI yet. Flipping can be bound to keys (not done by
> > > > default
> > > > since there are few keys free).
> > > >
> > > > So here is a summary of what you can do:
> > > >
> > > >
> > > > * Rotate canvas
> > > > - Via GUI spin-entry box:
> > > > * Directly enter a number.
> > > > * Mouse up/down to change by ±1°.
> > > > * Click on + or − to change by ±1°.
> > > > * Left click to open pop-up.
> > > > - Via Key shortcut
> > > > * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> > > > - Rotate Clockwise (Recommended: 'Shift-(')
> > > > - Rotate Counter-Clockwise (Recommended: 'Shift-)')
> > > > - Rotate 0 (Recommended: '0')
> > > > * Uses /options/rotateincrement/value for step size if set.
> > > > - Via Ctrl-Middle-Mouse-Button.
> > > > Drag cursor keeping Middle-Mouse-Button down to rotate.
> > > > Release mouse button to end.
> > > > * No auxilary key: ±1°.
> > > > * Shift: ±15°.
> > > > * Alt: arbitrary rotation.
> > > > * Shift + Ctrl: reset to zero.
> > > >
> > > > * Flip canvas
> > > > - Via Key shortcut
> > > > * Inkscape Preferences->Interface->Keyboard Shortcuts, View
> > > > - Flip Horizontal (Recommended: 'Shift-H')
> > > > - Flip Vertical (Recommended: 'Shift-V')
> > > > - Flip None
> > >
> > > Thank you very much for the work. The shortcut keys are great now
> > > :)
> > >
> > >
> > > --
> > > Raghavendra Kamath
> > > Illustrator
> > > raghukamath.com
> > >
> > > -----------------------------------------------------------------
> > > -------------
> > > Check out the vibrant tech community on one of the world's most
> > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
> > > _______________________________________________
> > > Inkscape-devel mailing list
> > > Inkscape-devel(a)lists.sourceforge.net
> > > https://lists.sourceforge.net/lists/listinfo/inkscape-devel
> >
> > -------------------------------------------------------------------
> > -----------
> > Check out the vibrant tech community on one of the world's most
> > engaging tech sites, Slashdot.org! http://sdm.link/slashdot
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> > Inkscape-devel mailing list
> > Inkscape-devel(a)lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/inkscape-devel
>
>
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12:09 p.m.
New subject: Canvas rotation and flip update.
On Sat, 2017-04-22 at 20:00 -0700, Yale Zhang wrote:
Well, I built on what Jabier and Tav did, so hats off to them too.
Hats off to everyone :-) no code is an island so keep reviewing each
other's code and building on it.
I'm excited by this feature even though it's not one I think I'll use.
Martin,
12:30 p.m.
New subject: Canvas rotation and flip update.
Uh, they do have canvas rotation at 15 degrees last time I checked. Just pointing that
out.
"There's a couple of possibilities here: either 4 and 6, or ctrl+[ and ctrl+] for
basic 15 degrees rotation left and right. But you can also have more sophisticated
rotation with Shift+Space+drag or shift+[middle mouse button]+drag. To reset the rotation,
press 5." - Introduction to Krita Coming from Sai at docs.krita.org
Plus, Krita can be horrifying to work with at times. More instable than Inkscape
Development Builds at times.
Oh, and a question. If I were to rotate and flip, can I save using that coordinate and
then freeze transformation akin to maya? Let me explain a little further.
In Maya, you can edit the rotation, scale, and position of a object. If you freeze the
transformation, the scale, rotation, and position becomes 0 without affecting the actual
coordinate of the vertex of a object.
So, in Inkscape, this is like flipping/rotating the entire scene, but resetting it back to
0 with the flipped/rotated result. I don't think this is neccessary unless one wants
to do something like mirror scene. Maybe it can come in handy for some people.
On 4/22/2017 11:00 PM, Yale Zhang wrote:
Well, I built on what Jabier and Tav did, so hats off to them too.
I just realized even Krita doesn't have canvas rotation (Autodesk
Sketchpad is the only other program I know). Good to be ahead of Krita
for once (and all the fancy Qt, VC SIMD libraries they use)!
On Sat, Apr 22, 2017 at 12:16 PM, Victor Westmann
<victor.westmann@...400...><mailto:victor.westmann@...400...> wrote:
That's amazing Yale! Can't wait to use Inkcape in a tablet in the near
future to test this new gestures.
Cheers.
--Victor Westmann
2017-04-22 5:04 GMT-07:00 Tavmjong Bah
<tavmjong@...8...><mailto:tavmjong@...8...>:
Looks nice.
I'll try to set some time aside next week to have a good look at the
code and hopefully merge it.
Tav
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:
https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
*I couldn't figure out how to set the rotation, zoom, and offset
using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine
matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
*had to roll back r15548 or else touch screen events get lost
somehow.
* I couldn't figure out how to use the GTK gesture classes (which are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes
weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
-Yale
On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
<raghu@...3496...><mailto:raghu@...3496...> wrote:
Hi Tav,
On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
Hi,
I've just checked in code to quickly preview canvas rotation.
Like
Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It
lacks
all the fancy graphics of Jabier's version. Some of this can be
added
back if there is user demand. There is certainly some tweaking to
do.
I also implemented canvas flip (Horizontal and Vertical). This is
not
in the GUI yet. Flipping can be bound to keys (not done by
default
since there are few keys free).
So here is a summary of what you can do:
* Rotate canvas
- Via GUI spin-entry box:
* Directly enter a number.
* Mouse up/down to change by ±1°.
* Click on + or − to change by ±1°.
* Left click to open pop-up.
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Rotate Clockwise (Recommended: 'Shift-(')
- Rotate Counter-Clockwise (Recommended: 'Shift-)')
- Rotate 0 (Recommended: '0')
* Uses /options/rotateincrement/value for step size if set.
- Via Ctrl-Middle-Mouse-Button.
Drag cursor keeping Middle-Mouse-Button down to rotate.
Release mouse button to end.
* No auxilary key: ±1°.
* Shift: ±15°.
* Alt: arbitrary rotation.
* Shift + Ctrl: reset to zero.
* Flip canvas
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Flip Horizontal (Recommended: 'Shift-H')
- Flip Vertical (Recommended: 'Shift-V')
- Flip None
Thank you very much for the work. The shortcut keys are great now
:)
--
Raghavendra Kamath
Illustrator
raghukamath.com
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1:46 a.m.
New subject: Canvas rotation and flip update.
Actually, I think I just had another idea, and yes it means scrapping the rotating canvas
function. What about implementing rotate/flip entire vector objects (including the info
within the objects and layers) within arbitrary numbers and orthographic numbers and being
able to record the number? It'd be almost like rotating/flipping entire canvas. Also,
when I was testing squares when the canvas is rotated, the square is still aligned to the
viewbox lines. The guideline also are aligned to the viewbox. Neither of those is suppose
to happen. Rotate/flipping entire vector objects including information doesn't really
affect the the creation of squares or guidelines relative to your own viewpoint.
On 4/22/2017 11:30 PM, Miguel Lopez wrote:
Uh, they do have canvas rotation at 15 degrees last time I checked. Just pointing that
out.
"There's a couple of possibilities here: either 4 and 6, or ctrl+[ and ctrl+] for
basic 15 degrees rotation left and right. But you can also have more sophisticated
rotation with Shift+Space+drag or shift+[middle mouse button]+drag. To reset the rotation,
press 5." - Introduction to Krita Coming from Sai at docs.krita.org
Plus, Krita can be horrifying to work with at times. More instable than Inkscape
Development Builds at times.
Oh, and a question. If I were to rotate and flip, can I save using that coordinate and
then freeze transformation akin to maya? Let me explain a little further.
In Maya, you can edit the rotation, scale, and position of a object. If you freeze the
transformation, the scale, rotation, and position becomes 0 without affecting the actual
coordinate of the vertex of a object.
So, in Inkscape, this is like flipping/rotating the entire scene, but resetting it back to
0 with the flipped/rotated result. I don't think this is neccessary unless one wants
to do something like mirror scene. Maybe it can come in handy for some people.
On 4/22/2017 11:00 PM, Yale Zhang wrote:
Well, I built on what Jabier and Tav did, so hats off to them too.
I just realized even Krita doesn't have canvas rotation (Autodesk
Sketchpad is the only other program I know). Good to be ahead of Krita
for once (and all the fancy Qt, VC SIMD libraries they use)!
On Sat, Apr 22, 2017 at 12:16 PM, Victor Westmann
<victor.westmann@...400...><mailto:victor.westmann@...400...> wrote:
That's amazing Yale! Can't wait to use Inkcape in a tablet in the near
future to test this new gestures.
Cheers.
--Victor Westmann
2017-04-22 5:04 GMT-07:00 Tavmjong Bah
<tavmjong@...8...><mailto:tavmjong@...8...>:
Looks nice.
I'll try to set some time aside next week to have a good look at the
code and hopefully merge it.
Tav
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:
https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP<https://1drv.ms/u/s%2...
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
*I couldn't figure out how to set the rotation, zoom, and offset
using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine
matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
*had to roll back r15548 or else touch screen events get lost
somehow.
* I couldn't figure out how to use the GTK gesture classes (which are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes
weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
-Yale
On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath
<raghu@...3496...><mailto:raghu@...3496...> wrote:
Hi Tav,
On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
Hi,
I've just checked in code to quickly preview canvas rotation.
Like
Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It
lacks
all the fancy graphics of Jabier's version. Some of this can be
added
back if there is user demand. There is certainly some tweaking to
do.
I also implemented canvas flip (Horizontal and Vertical). This is
not
in the GUI yet. Flipping can be bound to keys (not done by
default
since there are few keys free).
So here is a summary of what you can do:
* Rotate canvas
- Via GUI spin-entry box:
* Directly enter a number.
* Mouse up/down to change by ±1°.
* Click on + or − to change by ±1°.
* Left click to open pop-up.
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Rotate Clockwise (Recommended: 'Shift-(')
- Rotate Counter-Clockwise (Recommended: 'Shift-)')
- Rotate 0 (Recommended: '0')
* Uses /options/rotateincrement/value for step size if set.
- Via Ctrl-Middle-Mouse-Button.
Drag cursor keeping Middle-Mouse-Button down to rotate.
Release mouse button to end.
* No auxilary key: ±1°.
* Shift: ±15°.
* Alt: arbitrary rotation.
* Shift + Ctrl: reset to zero.
* Flip canvas
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Flip Horizontal (Recommended: 'Shift-H')
- Flip Vertical (Recommended: 'Shift-V')
- Flip None
Thank you very much for the work. The shortcut keys are great now
:)
--
Raghavendra Kamath
Illustrator
raghukamath.com
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3:29 a.m.
New subject: Canvas rotation and flip update.
"Lukas started working on canvas rotation for Krita in 2009"
Sorry, so Krita has had canvas rotation for a long time. I didn't think it
had it because in the latest version, I couldn't use touch to rotate the
canvas, only scale and scroll. I also tried some mouse combos (e.g. middle
button + drag like in Blender) and checked the menus but didn't see any
canvas rotation (only a lossy image rotate).
Boudewijn, excuse my jealousy of Krita. I'm just saying it takes a lot of
tolerance for pain and allegiance to the FSF to stick with GTK :)
"The guideline also are aligned to the viewbox."
I noticed that too and it doesn't make sense.
On Sun, Apr 23, 2017 at 9:46 AM, Miguel Lopez <reptillia39@...3425...> wrote:
Actually, I think I just had another idea, and yes it means scrapping
the
rotating canvas function. What about implementing rotate/flip entire vector
objects (including the info within the objects and layers) within arbitrary
numbers and orthographic numbers and being able to record the number? It'd
be almost like rotating/flipping entire canvas. Also, when I was testing
squares when the canvas is rotated, the square is still aligned to the
viewbox lines. The guideline also are aligned to the viewbox. Neither of
those is suppose to happen. Rotate/flipping entire vector objects including
information doesn't really affect the the creation of squares or guidelines
relative to your own viewpoint.
On 4/22/2017 11:30 PM, Miguel Lopez wrote:
Uh, they do have canvas rotation at 15 degrees last time I checked. Just
pointing that out.
"There's a couple of possibilities here: either 4 and 6, or ctrl+[ and
ctrl+] for basic 15 degrees rotation left and right. But you can also
have more sophisticated rotation with Shift+Space+drag or shift+[image:
middle mouse button]+drag. To reset the rotation, press 5." -
Introduction to Krita Coming from Sai at docs.krita.org
Plus, Krita can be horrifying to work with at times. More instable than
Inkscape Development Builds at times.
Oh, and a question. If I were to rotate and flip, can I save using that
coordinate and then freeze transformation akin to maya? Let me explain a
little further.
In Maya, you can edit the rotation, scale, and position of a object. If
you freeze the transformation, the scale, rotation, and position becomes 0
without affecting the actual coordinate of the vertex of a object.
So, in Inkscape, this is like flipping/rotating the entire scene, but
resetting it back to 0 with the flipped/rotated result. I don't think this
is neccessary unless one wants to do something like mirror scene. Maybe it
can come in handy for some people.
On 4/22/2017 11:00 PM, Yale Zhang wrote:
Well, I built on what Jabier and Tav did, so hats off to them too.
I just realized even Krita doesn't have canvas rotation (Autodesk
Sketchpad is the only other program I know). Good to be ahead of Krita
for once (and all the fancy Qt, VC SIMD libraries they use)!
On Sat, Apr 22, 2017 at 12:16 PM, Victor Westmann<victor.westmann@...972.....>
<victor.westmann@...400...> wrote:
That's amazing Yale! Can't wait to use Inkcape in a tablet in the near
future to test this new gestures.
Cheers.
--Victor Westmann
2017-04-22 5:04 GMT-07:00 Tavmjong Bah <tavmjong@...8...>
<tavmjong@...2205.....>:
Looks nice.
I'll try to set some time aside next week to have a good look at the
code and hopefully merge it.
Tav
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
*I couldn't figure out how to set the rotation, zoom, and offset
using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine
matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
*had to roll back r15548 or else touch screen events get lost
somehow.
* I couldn't figure out how to use the GTK gesture classes (which are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes
weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
-Yale
On Tue, Apr 4, 2017 at 8:35 PM, Raghavendra Kamath<raghu@...3496...>
<raghu@...3496...> wrote:
Hi Tav,
On 2017 Mar 30 13:29:23, Tavmjong Bah wrote:
Hi,
I've just checked in code to quickly preview canvas rotation.
Like
Jabier's code, it is triggered by Ctrl-Middle-Mouse-Button. It
lacks
all the fancy graphics of Jabier's version. Some of this can be
added
back if there is user demand. There is certainly some tweaking to
do.
I also implemented canvas flip (Horizontal and Vertical). This is
not
in the GUI yet. Flipping can be bound to keys (not done by
default
since there are few keys free).
So here is a summary of what you can do:
* Rotate canvas
- Via GUI spin-entry box:
* Directly enter a number.
* Mouse up/down to change by ±1°.
* Click on + or − to change by ±1°.
* Left click to open pop-up.
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Rotate Clockwise (Recommended: 'Shift-(')
- Rotate Counter-Clockwise (Recommended: 'Shift-)')
- Rotate 0 (Recommended: '0')
* Uses /options/rotateincrement/value for step size if set.
- Via Ctrl-Middle-Mouse-Button.
Drag cursor keeping Middle-Mouse-Button down to rotate.
Release mouse button to end.
* No auxilary key: ±1°.
* Shift: ±15°.
* Alt: arbitrary rotation.
* Shift + Ctrl: reset to zero.
* Flip canvas
- Via Key shortcut
* Inkscape Preferences->Interface->Keyboard Shortcuts, View
- Flip Horizontal (Recommended: 'Shift-H')
- Flip Vertical (Recommended: 'Shift-V')
- Flip None
Thank you very much for the work. The shortcut keys are great now
:)
--
Raghavendra Kamath
Illustratorraghukamath.com
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9:11 p.m.
New subject: Canvas rotation and flip update.
On Sat, 22 Apr 2017, Yale Zhang wrote:
I just realized even Krita doesn't have canvas rotation
(Autodesk
Sketchpad is the only other program I know). Good to be ahead of Krita
for once (and all the fancy Qt, VC SIMD libraries they use)!
Lukas started working on canvas rotation for Krita in 2009:
http://lukast.mediablog.sk/log/?p=73
And it was released in 2010:
http://blog.cberger.net/2010/12/11/krita-2-3-new-feature-5-canvas-rotation/
:-)
--
Boudewijn Rempt | http://www.krita.org, http://www.valdyas.org
9:39 p.m.
New subject: Touch
Hi,
I've had a look at the code and have come comments.
General comments:
1. Coding style should conform to:
https://inkscape.org/en/develop/coding-style/
2. Loads of compiler errors of the type:
src/display.sp-canvas.cpp:1556:43: error: invalid conversion from
'gpointer {aka void*}' to 'GdkWindow* {aka _GdkWindow*}; [-fpermissive]
These are mostly in copying event data to bevent. Why is bevent
necessary? Can't the function just return 'FALSE' to get
gtk_widget_real_touch_event() to do the translation?
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
Rotate should be useful. I think most people find it easier to draw
vertical lines than horizontal since there's less wrist motion.
I've updated my touchscreen code to support canvas rotation. Anyone
want to use it?
https://youtu.be/-8v1EVKqcaM
transform math:
https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
A couple of notes:
*awkward coordinate system - Why is the canvas completely off the
screen when rotation=0, offset=0? It seems the window's Y axis points
down while the document's Y axis points up?
Inkscape uses an inverted coordinate system as compared to SVG. This is
a long standing "bug" which we hope to fix some day but it is so
embedded inside Inkscape so that fixing every occurrence is a
nightmare.
* why is a positive rotation counter clockwise? In a left handed
coordinate system, it should be clockwise.
It depends on where the rotation is taking place. Desktop uses right-
handed, SVG uses left-handed. See above.
*I couldn't figure out how to set the rotation, zoom, and offset
using
the functions in the desktop class (scroll_to_point(),
zoom_absolute_keep_point() and had to access the private affine
matrix
directly. Calling those functions in sequence seems to add unwanted
offsets on top of each other instead of letting me set the offset
directly.
I can help with this. One shouldn't need to access the private affine
matrix. You probably want:
SPDesktop::rotate_relative_keep_point (Geom::Point const &c, double
rotate);
and
SPDesktop::zoom_relative_keep_point (Geom::Point const &c, double
zoom);
where 'c' is the point halfway between the two touch points in desktop
coordinates:
Geom::Point const event_w(ave.x, ave.y);
Geom::Point const event_dt(desktop->w2d(event_w));
c = event_dt;
Note also that rotation and scaling are handled independently of
offset.
*had to roll back r15548 or else touch screen events get lost
somehow.
This should be investigated as using gtk_device_grab (which you have
reverted to) is deprecated.
* I couldn't figure out how to use the GTK gesture classes (which
are
probably more robust), so wrote my own code for detecting zoom,
rotate, and scroll gestures. When I tried, the gesture classes
weren't
receiving any events. 2nd, it seems only 2 finger rotation and zoom
gestures are recognized, but not 2 finger scrolling. There is a 1
finger scroll gesture.
How important is it to be able to scroll using two fingers? I imagine
it would be useful to be able to rotate and scroll at the same time.
One finger scroll might work by ignoring the second finger.... (one
would need to experiment with a gesture group containing zooming,
rotating, and scrolling).
Tav
-Yale
7:38 p.m.
New subject: Touch
Thanks for the review Tav. It's been a busy few weeks, but I'm back.
2. Yes, I tried since the beginning to have SPCanvas::handle_touch()
return false so that gtk_widget_real_touch_event() is used to generate
the mouse emulation events. gtk_widget_real_touch_event() indeed gets
called and generates an event, but for some reason, that event doesn't
get received by Inkscape. I'll have to dig further.
-----------------------------------------------------------------------------------------------------------------------
[use SPDesktop::rotate_relative_keep_point (Geom::Point const &c,
double rotate);]
I tried using those functions, but couldn't avoid reading/writing the
offset of the transform matrix directly.
Here's the only version that I got to work.
#if 0
desktop->_current_affine.setRotate(finalRotation);
desktop->_current_affine.setScale(scale0 * scale);
desktop->_current_affine.setOffset(-offset);
#else
Geom::Point const rotationCenter_dt(desktop->w2d(rotationCenter -
desktop->_current_affine.getOffset())); // have to subtract
offset because w2d matrix doesn't have it !
desktop->zoom_absolute_keep_point(rotationCenter_dt, scale0 * scale);
desktop->rotate_absolute_keep_point(rotationCenter_dt, finalRotation);
desktop->scroll_absolute(-offset);
#endif
offset is highly coupled with the rotation and scaling. I thought
there might be a way to describe the transform without that
complicated expression for offset. I tried a few permutations of
zoom_absolute_keep_point(), rotate_absolute_keep_point(), and
scroll_absolute() but couldn't figure it out.
Is there any objection to adding a function in Desktop to set the
rotation, scaling, and offset together?
--------------------------------------------------------------------------------------------------------------
"*had to roll back r15548 or else touch screen events get lost"
I've found this was a problem with gdk_seat_grab(), which doesn't
listen for touch events. I've filed a report and possible solution:
https://bugzilla.gnome.org/show_bug.cgi?id=781757
This isn't a complete stopper. It only causes touch events to be
dropped when using certain tools like selection. Using touch when
holding other tools like tweak, there's no difference between
gtk_device_grab() and gdk_seat_grab().
----------------------------------------------------------------------------------------------------------------
"How important is it to be able to scroll using two fingers?"
Probably not critical. If you use 1 finger to scroll, then you can no
longer use your finger to drive the tools (I don't see any way to tell
those actions apart). Giving that up might be OK, because I never pan
with my fingers - only pan/zoom/rotate and dragging selections.
On Mon, Apr 24, 2017 at 5:39 AM, Tavmjong Bah <tavmjong@...8...> wrote:
Hi,
I've had a look at the code and have come comments.
General comments:
1. Coding style should conform to:
https://inkscape.org/en/develop/coding-style/
2. Loads of compiler errors of the type:
src/display.sp-canvas.cpp:1556:43: error: invalid conversion from
'gpointer {aka void*}' to 'GdkWindow* {aka _GdkWindow*}; [-fpermissive]
These are mostly in copying event data to bevent. Why is bevent
necessary? Can't the function just return 'FALSE' to get
gtk_widget_real_touch_event() to do the translation?
On Sat, 2017-04-22 at 04:27 -0700, Yale Zhang wrote:
> Rotate should be useful. I think most people find it easier to draw
> vertical lines than horizontal since there's less wrist motion.
>
> I've updated my touchscreen code to support canvas rotation. Anyone
> want to use it?
>
> https://youtu.be/-8v1EVKqcaM
>
> transform math:
> https://1drv.ms/u/s!AngRQgSreBCehTiw0R_rGV7gxQIP
>
> A couple of notes:
> *awkward coordinate system - Why is the canvas completely off the
> screen when rotation=0, offset=0? It seems the window's Y axis points
> down while the document's Y axis points up?
Inkscape uses an inverted coordinate system as compared to SVG. This is
a long standing "bug" which we hope to fix some day but it is so
embedded inside Inkscape so that fixing every occurrence is a
nightmare.
> * why is a positive rotation counter clockwise? In a left handed
> coordinate system, it should be clockwise.
It depends on where the rotation is taking place. Desktop uses right-
handed, SVG uses left-handed. See above.
> *I couldn't figure out how to set the rotation, zoom, and offset
> using
> the functions in the desktop class (scroll_to_point(),
> zoom_absolute_keep_point() and had to access the private affine
> matrix
> directly. Calling those functions in sequence seems to add unwanted
> offsets on top of each other instead of letting me set the offset
> directly.
I can help with this. One shouldn't need to access the private affine
matrix. You probably want:
SPDesktop::rotate_relative_keep_point (Geom::Point const &c, double
rotate);
and
SPDesktop::zoom_relative_keep_point (Geom::Point const &c, double
zoom);
where 'c' is the point halfway between the two touch points in desktop
coordinates:
Geom::Point const event_w(ave.x, ave.y);
Geom::Point const event_dt(desktop->w2d(event_w));
c = event_dt;
Note also that rotation and scaling are handled independently of
offset.
> *had to roll back r15548 or else touch screen events get lost
> somehow.
This should be investigated as using gtk_device_grab (which you have
reverted to) is deprecated.
> * I couldn't figure out how to use the GTK gesture classes (which are
> probably more robust), so wrote my own code for detecting zoom,
> rotate, and scroll gestures. When I tried, the gesture classes
> weren't
> receiving any events. 2nd, it seems only 2 finger rotation and zoom
> gestures are recognized, but not 2 finger scrolling. There is a 1
> finger scroll gesture.
How important is it to be able to scroll using two fingers? I imagine
it would be useful to be able to rotate and scroll at the same time.
One finger scroll might work by ignoring the second finger.... (one
would need to experiment with a gesture group containing zooming,
rotating, and scrolling).
Tav
> -Yale
2200
days inactive
2263
days old
inkscape-devel@lists.inkscape.org
16 comments
9 participants
participants (9)
-
Boudewijn Rempt -
Jabier Arraiza -
Jean-François Lemaire -
Martin Owens -
Miguel Lopez -
Raghavendra Kamath -
Tavmjong Bah -
Victor Westmann -
Yale Zhang