HaikuDepot: LinkedBitmapView derived from BitmapView

Sends a BMessage when clicked and enabled, shows the link cursor
when hovered with the mouse.

src/apps/haikudepot/ui_generic/LinkedBitmapView.cpp

@@ -0,0 +1,66 @@
+/*
+ * Copyright 2014, Stephan Aßmus <superstippi@gmx.de>.
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+
+
+#include "LinkedBitmapView.h"
+
+#include <Cursor.h>
+
+
+LinkedBitmapView::LinkedBitmapView(const char* name, BMessage* message)
+	:
+	BitmapView(name),
+	BInvoker(message, NULL),
+	fEnabled(true),
+	fMouseInside(false)
+{
+}
+
+
+void
+LinkedBitmapView::MouseMoved(BPoint where, uint32 transit,
+	const BMessage* dragMessage)
+{
+	// TODO: Check that no buttons are pressed, don't indicate clickable
+	// link if a button is held.
+	if (transit == B_ENTERED_VIEW) {
+		fMouseInside = true;
+		_UpdateViewCursor();
+	} else if (transit == B_EXITED_VIEW) {
+		fMouseInside = false;
+		_UpdateViewCursor();
+	}
+}
+
+
+void
+LinkedBitmapView::MouseDown(BPoint where)
+{
+	if (fEnabled)
+		Invoke(Message());
+}
+
+
+void
+LinkedBitmapView::SetEnabled(bool enabled)
+{
+	if (fEnabled != enabled) {
+		fEnabled = enabled;
+		_UpdateViewCursor();
+	}
+}
+
+
+void
+LinkedBitmapView::_UpdateViewCursor()
+{
+	if (fEnabled && fMouseInside) {
+		BCursor cursor(B_CURSOR_ID_FOLLOW_LINK);
+		SetViewCursor(&cursor, true);
+	} else {
+		BCursor cursor(B_CURSOR_SYSTEM_DEFAULT);
+		SetViewCursor(&cursor, true);
+	}
+}

src/apps/haikudepot/ui_generic/LinkedBitmapView.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2014, Stephan Aßmus <superstippi@gmx.de>.
+ * All rights reserved. Distributed under the terms of the MIT License.
+ */
+#ifndef LINKED_BITMAP_VIEW_H
+#define LINKED_BITMAP_VIEW_H
+
+
+#include <Invoker.h>
+
+#include "BitmapView.h"
+
+
+class LinkedBitmapView : public BitmapView, public BInvoker {
+public:
+								LinkedBitmapView(const char* name,
+									BMessage* message);
+
+	virtual	void				MouseMoved(BPoint where, uint32 transit,
+									const BMessage* dragMessage);
+	virtual	void				MouseDown(BPoint where);
+
+			void				SetEnabled(bool enabled);
+
+private:
+			void				_UpdateViewCursor();
+
+private:
+			bool				fEnabled;
+			bool				fMouseInside;
+};
+
+
+#endif // LINKED_BITMAP_VIEW_H