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package com.github.bordertech.wcomponents.examples.menu;
import com.github.bordertech.wcomponents.Action;
import com.github.bordertech.wcomponents.ActionEvent;
import com.github.bordertech.wcomponents.Disableable;
import com.github.bordertech.wcomponents.WComponent;
import com.github.bordertech.wcomponents.WDecoratedLabel;
import com.github.bordertech.wcomponents.WImage;
import com.github.bordertech.wcomponents.WMenu;
import com.github.bordertech.wcomponents.WMenuItem;
import com.github.bordertech.wcomponents.WMenuItemGroup;
import com.github.bordertech.wcomponents.WPanel;
import com.github.bordertech.wcomponents.WStyledText;
import com.github.bordertech.wcomponents.WSubMenu;
import com.github.bordertech.wcomponents.WText;
/**
* This component demonstrates the usage of a {@link WMenu.MenuType#FLYOUT} {@link WMenu}.
*
* @author Mark Reeves
* @since 1.0.0
*/
public class MenuFlyoutExample extends WPanel {
/**
* A menu to be used by other examples.
*/
private WMenu menu;
/**
* Creates a MenuFlyoutExample.
*/
public MenuFlyoutExample() {
WPanel content = new WPanel(WPanel.Type.BLOCK);
WText selectedMenuText = new WText();
content.add(new WStyledText("Selected item: ", WStyledText.Type.EMPHASISED));
content.add(selectedMenuText);
add(content);
add(buildMenu(selectedMenuText));
}
/**
* Create a MenuFlyoutExample with an existing selectedItem reporter.
* @param selectedMenuText The container to report the selected item.
*/
public MenuFlyoutExample(final WText selectedMenuText) {
menu = buildMenu(selectedMenuText);
}
/**
* Allow an external example to get a menu from this example.
* @return the WMenu.
*/
public WMenu getMenu() {
return menu;
}
/**
* Builds up a menu bar for inclusion in the example.
*
* @param selectedMenuText the WText to display the selected menu item.
* @return a menu for the example.
*/
private WMenu buildMenu(final WText selectedMenuText) {
WMenu menu = new WMenu(WMenu.MenuType.FLYOUT);
// The Colours menu just shows simple text
WSubMenu colourMenu = new WSubMenu("Colours");
addMenuItem(colourMenu, "Red", selectedMenuText);
addMenuItem(colourMenu, "Green", selectedMenuText);
addMenuItem(colourMenu, "Blue", selectedMenuText);
colourMenu.addSeparator();
colourMenu.add(new WMenuItem("Disable colour menu", new ToggleDisabledAction(colourMenu)));
menu.add(colourMenu);
// The Shapes menu shows grouping of items
WSubMenu shapeMenu = new WSubMenu("Shapes");
addMenuItem(shapeMenu, "Circle", selectedMenuText);
WMenuItemGroup triangleGroup = new WMenuItemGroup("Triangles");
shapeMenu.add(triangleGroup);
addMenuItem(triangleGroup, "Equilateral", selectedMenuText);
addMenuItem(triangleGroup, "Isosceles", selectedMenuText);
addMenuItem(triangleGroup, "Scalene", selectedMenuText);
addMenuItem(triangleGroup, "Right-angled", selectedMenuText);
addMenuItem(triangleGroup, "Obtuse", selectedMenuText);
WMenuItemGroup quadGroup = new WMenuItemGroup("Quadrilaterals");
shapeMenu.add(quadGroup);
addMenuItem(quadGroup, "Square", selectedMenuText);
addMenuItem(quadGroup, "Rectangle", selectedMenuText);
addMenuItem(quadGroup, "Rhombus", selectedMenuText);
addMenuItem(quadGroup, "Trapezoid", selectedMenuText);
addMenuItem(quadGroup, "Parallelogram", selectedMenuText);
shapeMenu.addSeparator();
shapeMenu.add(new WMenuItem("Disable shape menu", new ToggleDisabledAction(shapeMenu)));
menu.add(shapeMenu);
// The Image menu shows use of decorated labels and images
WSubMenu imageMenu = new WSubMenu("Images");
imageMenu.add(createImageMenuItem("/image/flag.png", "Flag", "eg-menu-image-1",
selectedMenuText));
imageMenu.add(createImageMenuItem("/image/attachment.png", "Attachment", "eg-menu-image-2",
selectedMenuText));
imageMenu.add(createImageMenuItem("/image/settings.png", "Settings", "eg-menu-image-3",
selectedMenuText));
imageMenu.addSeparator();
imageMenu.add(new WMenuItem("Disable image menu", new ToggleDisabledAction(imageMenu)));
menu.add(imageMenu);
WSubMenu sitesMenu = new WSubMenu("External apps");
sitesMenu.add(new WMenuItem("Example website", "http://www.example.com/"));
WMenuItem google = new WMenuItem("Example (new window)", "http://www.example.com/");
google.setTargetWindow("exampleWindow");
sitesMenu.add(google);
menu.add(sitesMenu);
// Add an item to toggle the states of all the menus
menu.add(new WMenuItem("Toggle top-level menus", new ToggleDisabledAction(colourMenu,
shapeMenu, imageMenu,
sitesMenu)));
menu.add(new WMenuItem("Link", "http://www.example.com"));
menu.add(new WMenuItem("No Action"));
return menu;
}
/**
* Adds an example menu item with the given text and an example action to the a parent component.
*
* @param parent the component to add the menu item to.
* @param text the text to display on the menu item.
* @param selectedMenuText the WText to display the selected menu item.
*/
private void addMenuItem(final WComponent parent, final String text,
final WText selectedMenuText) {
WMenuItem menuItem = new WMenuItem(text, new ExampleMenuAction(selectedMenuText));
menuItem.setActionObject(text);
if (parent instanceof WSubMenu) {
((WSubMenu) parent).add(menuItem);
} else {
((WMenuItemGroup) parent).add(menuItem);
}
}
/**
* Creates an example menu item using an image.
*
* @param resource the name of the image resource
* @param desc the description for the image
* @param cacheKey the cache key for this image
* @param selectedMenuText the WText to display the selected menu item.
* @return a menu item using an image
*/
private WMenuItem createImageMenuItem(final String resource, final String desc,
final String cacheKey,
final WText selectedMenuText) {
WImage image = new WImage(resource, desc);
image.setCacheKey(cacheKey);
WDecoratedLabel label = new WDecoratedLabel(image, new WText(desc), null);
WMenuItem menuItem = new WMenuItem(label, new ExampleMenuAction(selectedMenuText));
menuItem.setActionObject(desc);
return menuItem;
}
/**
* An action which toggles the disabled status of a component.
*
* @author Yiannis Paschalidis
*/
private static final class ToggleDisabledAction implements Action {
/**
* The disableable to toggle the disabled status of.
*/
private final Disableable[] disableables;
/**
* Creates a ToggleDisabledMenuAction which toggles the disabled status of the given Disableable when the action
* executes.
*
* @param disableables the disableable to toggle the disabled status of.
*/
private ToggleDisabledAction(final Disableable... disableables) {
this.disableables = disableables;
}
/**
* {@inheritDoc}
*/
@Override
public void execute(final ActionEvent event) {
for (Disableable disableable : disableables) {
disableable.setDisabled(!disableable.isDisabled());
}
}
}
}
