wtk/src/org/apache/pivot/wtk/content/MenuItemDataRenderer.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pivot.wtk.content;

import java.awt.Color;
import java.awt.Font;

import org.apache.pivot.wtk.BoxPane;
import org.apache.pivot.wtk.Button;
import org.apache.pivot.wtk.ImageView;
import org.apache.pivot.wtk.Insets;
import org.apache.pivot.wtk.Keyboard;
import org.apache.pivot.wtk.Label;
import org.apache.pivot.wtk.Menu;
import org.apache.pivot.wtk.Style;
import org.apache.pivot.wtk.TablePane;
import org.apache.pivot.wtk.VerticalAlignment;
import org.apache.pivot.wtk.media.Image;

/**
 * Default menu item data renderer.
 */
public class MenuItemDataRenderer extends TablePane implements Button.DataRenderer {
    protected ImageView imageView = new ImageView();
    protected Label textLabel = new Label();
    protected Label keyboardShortcutLabel = new Label();

    @SuppressWarnings("unused")
    public MenuItemDataRenderer() {
        getStyles().put(Style.padding, new Insets(2));

        new TablePane.Column(this, 1, true);
        new TablePane.Column(this);

        BoxPane boxPane = new BoxPane();
        boxPane.add(imageView);
        boxPane.add(textLabel);
        boxPane.getStyles().put(Style.verticalAlignment, VerticalAlignment.CENTER);
        boxPane.getStyles().put(Style.padding, new Insets(0, 0, 0, 6));

        TablePane.Row row = new TablePane.Row(this);
        row.add(boxPane);
        row.add(keyboardShortcutLabel);

        imageView.getStyles().put(Style.backgroundColor, null);
    }

    @Override
    public void setSize(int width, int height) {
        super.setSize(width, height);

        // Since this component doesn't have a parent, it won't be validated
        // via layout; ensure that it is valid here
        validate();
    }

    @Override
    public void render(Object data, Button button, boolean highlighted) {
        Image icon = null;
        String text = null;
        Keyboard.KeyStroke keyboardShortcut = null;

        if (data instanceof BaseContent) {
            BaseContent buttonData = (BaseContent) data;
            icon = buttonData.getIcon();

            if (buttonData instanceof MenuItemData) {
                MenuItemData menuItemData = (MenuItemData) buttonData;
                keyboardShortcut = menuItemData.getKeyboardShortcut();
            }
        } else if (data instanceof Image) {
            icon = (Image) data;
        }
        text = toString(data);

        // If the button is selected, icon is a checkmark; otherwise,
        // attempt to retrieve icon from button data
        if (button.isSelected()) {
            icon = (Image) button.getStyles().get(Style.checkmarkImage);
        }

        // Update the image view
        Menu.Item menuItem = (Menu.Item) button;
        Menu menu = (Menu) menuItem.getParent();

        int margin = menu.getStyles().getInt(Style.margin);
        Insets padding = (Insets) getStyles().get(Style.padding);

        imageView.setImage(icon);
        imageView.setPreferredWidth(margin - padding.left * 2);
        imageView.getStyles().put(Style.opacity, button.isEnabled() ? new Float(1.0f) : new Float(0.5f));

        // Update the labels
        textLabel.setText(text != null ? text : "");

        Font font = menu.getStyles().getFont(Style.font);
        textLabel.getStyles().put(Style.font, font);
        keyboardShortcutLabel.getStyles().put(Style.font, font.deriveFont(Font.ITALIC));

        Color color;
        if (button.isEnabled()) {
            if (highlighted) {
                color = menu.getStyles().getColor(Style.activeColor);
            } else {
                color = menu.getStyles().getColor(Style.color);
            }
        } else {
            color = menu.getStyles().getColor(Style.disabledColor);
        }

        textLabel.getStyles().put(Style.color, color);
        keyboardShortcutLabel.getStyles().put(Style.color, color);

        boolean showKeyboardShortcuts = false;
        if (menu.getStyles().containsKey(Style.showKeyboardShortcuts)) {
            showKeyboardShortcuts = menu.getStyles().getBoolean(Style.showKeyboardShortcuts);
        }

        if (showKeyboardShortcuts) {
            keyboardShortcutLabel.setVisible(true);
            keyboardShortcutLabel.setText(keyboardShortcut != null ? keyboardShortcut.toString()
                : "");
        } else {
            keyboardShortcutLabel.setVisible(false);
        }
    }

    @Override
    public String toString(Object data) {
        String string = null;

        if (data instanceof BaseContent) {
            BaseContent baseContent = (BaseContent) data;
            string = baseContent.getText();
        } else if (!(data instanceof Image)) {
            if (data != null) {
                string = data.toString();
            }
        }

        return string;
    }
}