com.qualogy.qafe.gwt.client.component.QStackPanel.java Source code

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Here is the source code for com.qualogy.qafe.gwt.client.component.QStackPanel.java

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/**
 * Copyright 2008-2015 Qualogy Solutions B.V.
 *
 * 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 com.qualogy.qafe.gwt.client.component;

import java.util.ArrayList;

import com.google.gwt.user.client.ui.DecoratedStackPanel;
import com.google.gwt.user.client.ui.Widget;

public class QStackPanel extends DecoratedStackPanel {
    private Widget selectedStack;

    public Widget getSelectedStack() {
        return selectedStack;
    }

    public void setSelectedStack(Widget selectedStack) {
        this.selectedStack = selectedStack;
    }

    public void storeSelectedWidget() {
        int currentSelectedIndex = getSelectedIndex();
        if (currentSelectedIndex > -1) {
            selectedStack = getWidget(currentSelectedIndex);
        }
    }

    public void showStack(Widget stack) {
        setSelectedStack(stack);
        showStack();
    }

    public void processVisible(QStack stackToProcess, boolean visible) {
        storeSelectedWidget();
        if (visible) {
            if (stackToProcess.isAttached()) {
                return;
            }
            ArrayList<QStack> stacks = makeCopyOfStacks();
            //remove all items and add it again to avoid selection problems.
            for (QStack qStack : stacks) {
                remove(qStack);
            }

            addStacksInOrder(stackToProcess, stacks);

        } else if (stackToProcess.isAttached()) {
            remove(stackToProcess);
        }
        showStack();
    }

    private void addStacksInOrder(QStack stackToProcess, ArrayList<QStack> stacks) {
        boolean added = false;
        for (int i = 0; i < stacks.size(); i++) {
            QStack qStack = stacks.get(i);
            if (!added && qStack.getStackIndex() > stackToProcess.getStackIndex()) {
                add(stackToProcess, stackToProcess.getStackText());
                added = true;
            }
            add(qStack, qStack.getStackText());
        }
        if (!added) {
            add(stackToProcess, stackToProcess.getStackText());
        }
    }

    private void showStack() {
        int currentSelectedIndex = getWidgetIndex(selectedStack);
        currentSelectedIndex = (currentSelectedIndex > -1) ? currentSelectedIndex : 0;
        showStack(currentSelectedIndex);
    }

    private ArrayList<QStack> makeCopyOfStacks() {
        ArrayList<QStack> stacks = new ArrayList<QStack>();
        for (int i = 0; i < getWidgetCount(); i++) {
            if (getWidget(i) instanceof QStack) {
                QStack stack = (QStack) getWidget(i);
                stacks.add(stack);
            }
        }
        return stacks;
    }
}