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Add support for mouse input transparency

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This adds the GLFW_MOUSE_PASSTHROUGH window hint and attribute for
controlling whether mouse input passes through the window to whatever
window is behind it.

Fixes #1236.
Closes #1568.
This commit is contained in:
Rokas Kupstys
2019-09-30 15:44:43 +03:00
committed by Camilla Löwy
parent 6c031af245
commit d285a9fdeb
10 changed files with 148 additions and 0 deletions
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src/x11_window.c
+26
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@@ -2702,6 +2702,32 @@ void _glfwPlatformSetWindowFloating(_GLFWwindow* window, GLFWbool enabled)
XFlush(_glfw.x11.display);
}
void _glfwPlatformSetWindowMousePassthrough(_GLFWwindow* window, GLFWbool enabled)
{
if (!_glfw.x11.xshape.available)
return;
if (enabled == window->mousePassthrough)
return;
int width = 0;
int height = 0;
if (!enabled)
_glfwPlatformGetWindowSize(window, &width, &height);
XRectangle rect;
rect.x = 0;
rect.y = 0;
rect.width = (unsigned short)width;
rect.height = (unsigned short)height;
Region region = XCreateRegion();
XUnionRectWithRegion(&rect, region, region);
XShapeCombineRegion(_glfw.x11.display, window->x11.handle, 2/*ShapeInput*/, 0, 0, region, 0/*ShapeSet*/);
XDestroyRegion(region);
window->mousePassthrough = enabled;
}
float _glfwPlatformGetWindowOpacity(_GLFWwindow* window)
{
float opacity = 1.f;