Button that pops out a [ColorPicker]. Encapsulates a [ColorPicker] making it accesible by pressing a button, pressing the button will toggle the [ColorPicker] visibility Returns the [code]ColorPicker[/code] that this [code]ColorPickerButton[/code] toggles. Returns the control's [PopupPanel] which allows you to connect to Popup Signals. This allows you to handle events when the ColorPicker is shown or hidden. The currently selected color. If [code]true[/code] the alpha channel in the displayed [ColorPicker] will be visible. Default value: [code]true[/code]. Emitted when the color changes.