Open source Star Ruler 2 source code!

2018-07-17 14:15:37 +02:00
commit cc307720ff
4342 changed files with 2365070 additions and 0 deletions
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+import elements.BaseGuiElement;
+
+export GuiDraggable;
+
+class GuiDraggable : BaseGuiElement {
+	bool Dragging;
+	bool allowPassthrough;
+	bool btnDown = false;
+	vec2i dragPos;
+	vec2i dragOffset;
+
+	GuiDraggable(IGuiElement@ ParentElement, const recti& Rectangle) {
+		Dragging = false;
+		allowPassthrough = true;
+		super(ParentElement, Rectangle);
+		updateAbsolutePosition();
+	}
+
+	void emitChange() {
+		GuiEvent evt;
+		evt.type = GUI_Changed;
+		@evt.caller = this;
+		onGuiEvent(evt);
+	}
+
+	bool onMouseEvent(const MouseEvent& event, IGuiElement@ source) {
+		if(source is this || allowPassthrough) {
+			switch(event.type) {
+				case MET_Button_Down:
+					if(event.button == 0) {
+						btnDown = true;
+						dragPos = Position.topLeft;
+						dragOffset = mousePos;
+						bringToFront();
+						return true;
+					}
+				break;
+				case MET_Moved:
+					if(Dragging) {
+						position = mousePos - dragOffset + dragPos;
+						return true;
+					}
+					else if(btnDown) {
+						if((mousePos - dragOffset).length > 2)
+							Dragging = true;
+						return true;
+					}
+				break;
+				case MET_Button_Up:
+					if(event.button == 0) {
+						btnDown = false;
+						if(Dragging) {
+							if(Position.topLeft != dragPos)
+								emitChange();
+							Dragging = false;
+							return true;
+						}
+					}
+				break;
+			}
+		}
+		return BaseGuiElement::onMouseEvent(event, source);
+	}
+
+	bool onGuiEvent(const GuiEvent& event) {
+		if(event.caller is this) {
+			switch(event.type) {
+				case GUI_Mouse_Left:
+				case GUI_Focus_Lost:
+					if(Dragging)
+						return true;
+					break;
+			}
+		}
+		return BaseGuiElement::onGuiEvent(event);
+	}
+};