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for GTK runtime, don't call cursorPosCallback in mouse motion callback if the cursor hasn't actually moved

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james
2025-01-11 23:53:19 -05:00
parent d4190c9c02
commit faea09bbde
1 changed files with 27 additions and 21 deletions
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18
src/apprt/gtk/Surface.zig
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@ -1496,17 +1496,22 @@ fn gtkMouseMotion(
.y = @floatCast(scaled.y),
};
// When the GLArea is resized under the mouse, GTK issues a mouse motion
// event. This has the unfortunate side effect of causing focus to potentially
// change when `focus-follows-mouse` is enabled. To prevent this, we check
// if the cursor is still in the same place as the last event and only grab
// focus if it has moved.
// There seem to be at least two cases where GTK issues a mouse motion
// event without the cursor actually moving:
// 1. GLArea is resized under the mouse. This has the unfortunate
// side effect of causing focus to potentially change when
// `focus-follows-mouse` is enabled.
// 2. The window title is updated. This can cause the mouse to unhide
// incorrectly when hide-mouse-when-typing is enabled.
// To prevent incorrect behavior, we'll only grab focus and
// continue with callback logic if the cursor has actually moved.
const is_cursor_still = @abs(self.cursor_pos.x - pos.x) < 1 and
@abs(self.cursor_pos.y - pos.y) < 1;
if (!is_cursor_still) {
// If we don't have focus, and we want it, grab it.
const gl_widget = @as(*c.GtkWidget, @ptrCast(self.gl_area));
if (!is_cursor_still and c.gtk_widget_has_focus(gl_widget) == 0 and self.app.config.@"focus-follows-mouse") {
if (c.gtk_widget_has_focus(gl_widget) == 0 and self.app.config.@"focus-follows-mouse") {
self.grabFocus();
}
@ -1522,6 +1527,7 @@ fn gtkMouseMotion(
return;
};
}
}
fn gtkMouseLeave(
ec: *c.GtkEventControllerMotion,