Spacebar doesn't work on first drag after clicking on other elements

[RogerLevy]

Describe the bug

Buggy spacebar detection leads to constant editing mistakes.

Steps to reproduce

1. Open/Create a map with several layers
2. Edit a layer, pan around with spacebar
3. Select a different layer
4. Hold spacebar and try to pan the tilemap. It will use the current tool instead of panning. Try again and it works the second time.

Expected behavior

Tiled should be detecting the spacebar at a global level, so that the first time you click in the editing area while holdign it, the view will pan as expected.

OS version

Windows 10

Tiled version

1.11.2

[Oval17]

Hi @RogerLevy @bjorn , I am able to replicate this issue.

Root cause Analysis led me to this

SpaceBarEventFilter is installed only on MainWindow. Key events go to the focused widget, not MainWindow. When the Layers dock (a QTreeView) has focus, it consumes the Space key itself (to expand/collapse nodes). The event never propagates to MainWindow → mSpacePressed stays false → first click uses the tool instead of panning. After that click, MapView gets focus — it explicitly ignores Space (e->ignore()) so the event bubbles up to MainWindow and works from then on.

Fix: Install the filter on qApp (application-level). Qt routes all application-level filters before any widget processes an event, so it catches Space regardless of which widget has focus. Add a guard to skip text-input widgets (QLineEdit etc.) so typing spaces doesn't accidentally enable pan mode.
Have a raised a pr as well for same...

[Oval17]

Hi @bjorn ,
This issue can be assigned to me , I have already raised a MR for this,
Kindly have look as well on that.
Thanks