com.viaoa.jfc.OATabbedPane Maven / Gradle / Ivy

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/*  Copyright 1999-2015 Vince Via [email protected]
    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.viaoa.jfc;

import java.awt.Component;
import java.awt.Dimension;

import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JTabbedPane;

/**
 * This is to allow left pane Tabs to have the tab title left aligned.
 * @author vvia
 */
public class OATabbedPane extends JTabbedPane {
    private Dimension dimMaxSize;
    
    public OATabbedPane(int tabPlacement) {
        super(tabPlacement);
    }
    public OATabbedPane(int tabPlacement, int tabLayoutPolicy) {
        super(tabPlacement, tabLayoutPolicy);
    }
    
    @Override
    public void setTabPlacement(int tabPlacement) {
        dimMaxSize = null;
        super.setTabPlacement(tabPlacement);
    }
    
    @Override
    public void addTab(String title, Component component) {
        this.addTab(title, null, component, null);
    }

    @Override
    public void addTab(String title, Icon icon, Component component) {
        this.addTab(title, icon, component, null);
    }
    
    @Override
    public void addTab(String title, Icon icon, Component component, String tip) {
        dimMaxSize = null;
        super.addTab(title, icon, component, tip);
    }
    
    @Override
    public void setEnabled(boolean enabled) {
        super.setEnabled(enabled);
        if (getTabPlacement() == LEFT) {
            int tabCount = getTabCount();
            for (int i = 0; i < tabCount; i++) {
                JComponent comp = (JComponent) getTabComponentAt(i);
                if (comp != null) comp.setEnabled(enabled);
            }        
        }        
    }
    
    @Override
    public void doLayout() {
        if (getTabPlacement() == LEFT && dimMaxSize == null) {
            int tabCount = getTabCount();
            for (int i = 0; i < tabCount; i++) {
                JComponent oomp = (JComponent) getTabComponentAt(i);
                
                if (oomp == null) {
                    oomp = new JLabel(getTitleAt(i), getIconAt(i), JLabel.LEFT);
                    setTabComponentAt(i, oomp);
                }
                
                Dimension d = oomp.getPreferredSize();
                if (dimMaxSize == null) dimMaxSize = d;
                else {
                    dimMaxSize.width = Math.max(dimMaxSize.width, d.width);
                    dimMaxSize.height = Math.max(dimMaxSize.height, d.height);
                }
            }
            for (int i = 0; i < tabCount && dimMaxSize != null; i++) {
                JComponent comp = (JComponent) getTabComponentAt(i);
                if (comp != null) {
                    comp.setPreferredSize(dimMaxSize);
                }
            }
        }
        super.doLayout();
    }

}