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static constexpr const char *const  | ItemSelected = "ItemSelected" | 
|   | An node was selected in the tree view. Optional parameter: selected node. 
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static constexpr const char *const  | DoubleClicked = "DoubleClicked" | 
|   | A leaf node was double clicked. Optional parameter: selected node. 
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static constexpr const char *const  | Expanded = "Expanded" | 
|   | A branch node was expanded in the tree view. Optional parameter: expanded node. 
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static constexpr const char *const  | Collapsed = "Collapsed" | 
|   | A branch node was collapsed in the tree view. Optional parameter: collapsed node. 
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static constexpr const char *const  | RightClicked = "RightClicked" | 
|   | A node was right clicked. Optional parameter: node below mouse. 
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static constexpr const char *const  | PositionChanged = "PositionChanged" | 
|   | The position of the widget changed. Optional parameter: new position. 
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static constexpr const char *const  | SizeChanged = "SizeChanged" | 
|   | The size of the widget changed. Optional parameter: new size. 
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static constexpr const char *const  | Focused = "Focused" | 
|   | The widget was focused. 
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static constexpr const char *const  | Unfocused = "Unfocused" | 
|   | The widget was unfocused. 
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static constexpr const char *const  | MouseEntered = "MouseEntered" | 
|   | The mouse entered the widget. 
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static constexpr const char *const  | MouseLeft = "MouseLeft" | 
|   | The mouse left the widget. 
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static constexpr const char *const  | AnimationFinished = "AnimationFinished" | 
|   | A show or hide animation finished. Optional parameters: animation type, new widget visibility or both. 
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