Using arrow keys to do single-pixel nudge transforms fails with hiDPI #67924

New Issue

Sebastian Koenig · 2019-07-30T10:23:44+02:00

Sebastian Koenig commented

2019-07-30 10:23:44 +02:00

System Information
Operating system: Darwin-15.6.0-x86_64-i386-64bit 64 Bits
Graphics card: NVIDIA GeForce GT 750M OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.10.14 310.42.25f02

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-24 14:22, hash: 507ffee6e1
Worked: (optional)

Short description of error
Moving an object with the arrow keys has problems when combined with hiDPI. Pressing G and right or up arrows does not move the object, pressing G and left or down arrows does work.

Exact steps for others to reproduce the error

Open Blender using a hiDPI display
Press G to enter the translate modal operator
Press Up or Left arrows
Nothing happens

**System Information** Operating system: Darwin-15.6.0-x86_64-i386-64bit 64 Bits Graphics card: NVIDIA GeForce GT 750M OpenGL Engine NVIDIA Corporation 4.1 NVIDIA-10.10.14 310.42.25f02 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-24 14:22, hash: `507ffee6e1` Worked: (optional) **Short description of error** Moving an object with the arrow keys has problems when combined with hiDPI. Pressing G and right or up arrows does not move the object, pressing G and left or down arrows does work. **Exact steps for others to reproduce the error** - Open Blender using a hiDPI display - Press G to enter the translate modal operator - Press Up or Left arrows - Nothing happens

Sebastian Koenig commented

2019-07-30 10:23:44 +02:00

Added subscriber: @sebastian_k

William Reynish commented

2019-07-30 10:32:19 +02:00

Added subscriber: @WilliamReynish

William Reynish commented

2019-07-30 10:32:19 +02:00

Works fine here on a Danish keyboard which is similar to German. If I set the keyboard to German, it still works.

Martin Ackerl commented

2019-08-04 17:03:00 +02:00

Added subscriber: @martin.ackerl

Martin Ackerl commented

2019-08-04 17:03:00 +02:00

I have the same problem on my System. After pressing g, with the arrow keys I can move an object to the left and to the bottom but not to the right and up. Navigating in the timeline works fine with all arrow keys. Had the same problem already in 2.79

System Information
Operating system: Darwin-18.6.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro Vega 64 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.9.26

Blender Version
Broken: version: 2.81 (sub 1), branch: master, commit date: 2019-08-02 12:42, hash: 38ff5064b3

I have the same problem on my System. After pressing g, with the arrow keys I can move an object to the left and to the bottom but not to the right and up. Navigating in the timeline works fine with all arrow keys. Had the same problem already in 2.79 **System Information** Operating system: Darwin-18.6.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro Vega 64 OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.9.26 **Blender Version** Broken: version: 2.81 (sub 1), branch: master, commit date: 2019-08-02 12:42, hash: `38ff5064b3`

Yevgeny Makarov commented

2019-12-29 22:15:46 +01:00

Added subscriber: @jenkm

Yevgeny Makarov commented

2019-12-29 22:15:46 +01:00

It depends on the pixel density of a screen.
If you "Open in Low Resolution", then all keys will work.

The problem seems to be that when divided, the coordinates (integer type) are rounded down,
as a result, the cursor coordinates may decrease (left and down keys) but cannot increase (right and up keys).

void wm_cursor_position_to_ghost(wmWindow *win, int *x, int *y)
{
  float fac = GHOST_GetNativePixelSize(win->ghostwin);

  *x /= fac;
  *y /= fac;
  *y = win->sizey - *y - 1;

  GHOST_ClientToScreen(win->ghostwin, *x, *y, x, y);
}

It depends on the pixel density of a screen. If you "Open in Low Resolution", then all keys will work. The problem seems to be that when divided, the coordinates (integer type) are rounded down, as a result, the cursor coordinates may decrease (left and down keys) but cannot increase (right and up keys). ``` void wm_cursor_position_to_ghost(wmWindow *win, int *x, int *y) { float fac = GHOST_GetNativePixelSize(win->ghostwin); *x /= fac; *y /= fac; *y = win->sizey - *y - 1; GHOST_ClientToScreen(win->ghostwin, *x, *y, x, y); } ```

Martin Ackerl commented

2020-01-02 20:32:59 +01:00

Thank you @jenkm
I can confirm this on my system.

Thank you @jenkm I can confirm this on my system.

Yevgeny Makarov commented

2020-01-09 12:06:55 +01:00

@WilliamReynish can you rename this task, since it doesn't apply to the languages/keyboard but to the screen resolution and cursor coordinates.

William Reynish changed title from ~~Arrow keys on a German MacBookPro don't work correctly~~ to Using arrow keys to do single-pixel nudge transforms fails with hiDPI

2020-01-09 13:17:45 +01:00

William Reynish commented

2020-01-09 13:18:21 +01:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'