/**
* Construct a new button that can be used to toggle between black and white.
*
* @param appState Reference to the model, used to change drawing colour.
* @param identifier Identifier for this object.
*/
public ToggleColourButton(ApplicationState appState, String identifier) {
super();
this.as = appState;
this.identifier = identifier;
this.fgCol = Colour.BLACK;
this.bgCol = Colour.WHITE;
addPressHandler(this);
// Set class of button element
setStyleName(STYLENAME);
// Create element that shows foreground colour, set it up and add it
fgColEl = DivElement.as(DOM.createElement("div"));
fgColEl.setPropertyString("className", STYLENAME_FG_EL);
fgColEl.getStyle().setBackgroundColor(fgCol.toString());
getElement().appendChild(fgColEl);
// Create element that shows background colour, set it up and add it
bgColEl = DivElement.as(DOM.createElement("div"));
bgColEl.setPropertyString("className", STYLENAME_BG_EL);
bgColEl.getStyle().setBackgroundColor(bgCol.toString());
getElement().appendChild(bgColEl);
// Set the debug ID for the toggle colour button.
ensureDebugId("toggleColor");
}
/**
* Set the background colour properties for the foreground and background elements (using the
* global {@link #fgCol} and {@link #bgCol}).
*
* @param updateWhat A constant to indicate if only the foreground colour, only the background
* colour or both should be updated.
*/
protected void update(int updateWhat) {
boolean updateBg = (updateWhat == UPDATE_BOTH || updateWhat == UPDATE_BG);
boolean updateFg = (updateWhat == UPDATE_BOTH || updateWhat == UPDATE_FG);
if (updateFg) {
fgColEl.getStyle().setBackgroundColor(fgCol.toString());
}
if (updateBg) {
bgColEl.getStyle().setBackgroundColor(bgCol.toString());
}
// There are two ToggleColourButtons, update both
if (identifier.equals(TOGGLE_COLOUR)) {
if (updateFg && !GuiState.toolMenuToggleColour.fgCol.equals(fgCol)) {
GuiState.toolMenuToggleColour.setForegroundColour(fgCol);
}
if (updateBg && !GuiState.toolMenuToggleColour.bgCol.equals(bgCol)) {
GuiState.toolMenuToggleColour.setBackgroundColour(bgCol);
}
} else {
if (updateFg && !GuiState.toggleColour.fgCol.equals(fgCol)) {
GuiState.toggleColour.setForegroundColour(fgCol);
}
if (updateBg && !GuiState.toggleColour.bgCol.equals(bgCol)) {
GuiState.toggleColour.setBackgroundColour(bgCol);
}
}
// Update the colours of the drawing tool buttons
GuiState.squareDrawingTool.setColour(fgCol);
GuiState.circleDrawingTool.setColour(fgCol);
}