org.vaadin.hene.splitbutton.widgetset.client.ui.VSplitButton.java Source code

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Here is the source code for org.vaadin.hene.splitbutton.widgetset.client.ui.VSplitButton.java

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/*
 * Copyright 2011 Henri Kerola
 *
 * Licensed 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.vaadin.hene.splitbutton.widgetset.client.ui;

import java.util.Set;

import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.Widget;
import com.vaadin.terminal.gwt.client.ApplicationConnection;
import com.vaadin.terminal.gwt.client.Container;
import com.vaadin.terminal.gwt.client.Paintable;
import com.vaadin.terminal.gwt.client.RenderSpace;
import com.vaadin.terminal.gwt.client.UIDL;
import com.vaadin.terminal.gwt.client.Util;

/**
 * @author Henri Kerola
 */
public class VSplitButton extends Composite implements Paintable, Container {

    public static final String CLASSNAME = "v-splitbutton";

    private final Panel panel;

    private Widget buttonWidget;
    private Widget popupButtonWidget;

    private boolean initDone = false;

    private int buttonWidth;
    private int popupButtonWidth;
    private int buttonsHeight;

    private String width;
    private String height;

    public VSplitButton() {
        panel = new FlowPanel();
        initWidget(panel);

        setStyleName(CLASSNAME);
    }

    public void updateFromUIDL(UIDL uidl, ApplicationConnection client) {
        if (client.updateComponent(this, uidl, false)) {
            return;
        }

        UIDL buttonUidl = uidl.getChildUIDL(0);
        Paintable buttonPaintable = client.getPaintable(buttonUidl);
        panel.add((Widget) buttonPaintable);
        buttonPaintable.updateFromUIDL(buttonUidl, client);
        buttonWidget = (Widget) buttonPaintable;

        UIDL popupButtonUidl = uidl.getChildUIDL(1);
        Paintable popupButtonPaintable = client.getPaintable(popupButtonUidl);
        panel.add((Widget) popupButtonPaintable);
        popupButtonPaintable.updateFromUIDL(popupButtonUidl, client);
        popupButtonWidget = (Widget) popupButtonPaintable;

        if (!initDone) {
            setButtonWidth();
            setHeight();
        }

        initDone = true;
    }

    private void setButtonWidth() {
        if (width == null) {
            buttonWidget.setWidth("");
            popupButtonWidth = -1;
        } else {
            popupButtonWidth = Util.getRequiredWidth(popupButtonWidget.getElement());

            buttonWidth = getOffsetWidth() - popupButtonWidth;
            if (buttonWidth < 0) {
                buttonWidth = 0;
            }
            buttonWidget.setWidth(buttonWidth + "px");
        }
    }

    @Override
    public void setWidth(String width) {
        if (width == null || "".equals(width)) {
            this.width = null;
        } else {
            this.width = width;
        }

        Util.setWidthExcludingPaddingAndBorder(this, width, 0);

        if (initDone) {
            setButtonWidth();
        }
    }

    private void setHeight() {
        if (this.height == null) {
            buttonWidget.setHeight("");
            popupButtonWidget.setHeight("");
            int buttonHeight = Util.getRequiredHeight(buttonWidget);
            int popupButtonHeight = Util.getRequiredHeight(popupButtonWidget);
            if (buttonHeight > popupButtonHeight) {
                buttonWidget.setHeight(buttonHeight + "px");
                popupButtonWidget.setHeight(buttonHeight + "px");
                buttonsHeight = buttonHeight;
            } else {
                buttonWidget.setHeight(popupButtonHeight + "px");
                popupButtonWidget.setHeight(popupButtonHeight + "px");
                buttonsHeight = popupButtonHeight;
            }
        } else {
            buttonWidget.setHeight(this.height);
            popupButtonWidget.setHeight(this.height);
            buttonsHeight = Integer.parseInt(this.height.substring(0, this.height.length() - 2));
        }
    }

    @Override
    public void setHeight(String height) {
        super.setHeight(height);
        if (height == null || "".equals(height)) {
            this.height = null;
        } else {
            this.height = height;
        }
        if (initDone) {
            setHeight();
        }
    }

    public void replaceChildComponent(Widget oldComponent, Widget newComponent) {
        // TODO Auto-generated method stub

    }

    public boolean hasChildComponent(Widget component) {
        return component.getParent() == panel;
    }

    public void updateCaption(Paintable component, UIDL uidl) {
        // TODO Auto-generated method stub

    }

    public boolean requestLayout(Set<Paintable> children) {
        if (initDone) {
            setButtonWidth();
            setHeight();
        }
        return false;
    }

    public RenderSpace getAllocatedSpace(Widget child) {
        if (buttonWidget == child) {
            return new RenderSpace(buttonWidth, buttonsHeight);
        } else if (popupButtonWidget == child) {
            return new RenderSpace(popupButtonWidth, buttonsHeight);
        } else {
            return new RenderSpace(buttonWidth + popupButtonWidth, buttonsHeight);
        }
    }
}