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LibGUI+WindowServer: Start fleshing out drag&drop functionality

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This patch enables basic drag&drop between applications.
You initiate a drag by creating a GDragOperation object and calling
exec() on it. This creates a nested event loop in the calling program
that only returns once the drag operation has ended.

On the receiving side, you get a call to GWidget::drop_event() with
a GDropEvent containing information about the dropped data.

The only data passed right now is a piece of text that's also used
to visually indicate that a drag is happening (by showing the text in
a little box that follows the mouse cursor around.)

There are things to fix here, but we're off to a nice start. :^)
This commit is contained in:
Andreas Kling 2019-12-08 16:50:23 +01:00
parent e09a02ad3f
commit a7f414bba7
19 changed files with 318 additions and 3 deletions
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Servers/WindowServer/WSClientConnection.h
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@ -92,6 +92,7 @@ private:
virtual OwnPtr<WindowServer::DestroyMenuAppletResponse> handle(const WindowServer::DestroyMenuApplet&) override;
virtual OwnPtr<WindowServer::SetMenuAppletBackingStoreResponse> handle(const WindowServer::SetMenuAppletBackingStore&) override;
virtual OwnPtr<WindowServer::InvalidateMenuAppletRectResponse> handle(const WindowServer::InvalidateMenuAppletRect&) override;
virtual OwnPtr<WindowServer::StartDragResponse> handle(const WindowServer::StartDrag&) override;
HashMap<i32, NonnullOwnPtr<WSMenuApplet>> m_menu_applets;
HashMap<int, NonnullRefPtr<WSWindow>> m_windows;