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/*
* Copyright 2000-2013 JetBrains s.r.o.
*
* 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.intellij.ui;
import com.intellij.util.ui.UIUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import java.awt.*;
/**
* @author Vladimir Kondratyev
*/
public abstract class ColoredListCellRenderer<T> extends SimpleColoredComponent implements ListCellRenderer {
private final ListCellRenderer myDefaultGtkRenderer = UIUtil.isUnderGTKLookAndFeel() ? new JComboBox().getRenderer() : null;
protected boolean mySelected;
protected Color myForeground;
protected Color mySelectionForeground;
@Nullable
private final JComboBox myComboBox;
public ColoredListCellRenderer() {
this(null);
}
public ColoredListCellRenderer(@Nullable JComboBox comboBox) {
myComboBox = comboBox;
setFocusBorderAroundIcon(true);
getIpad().left = UIUtil.getListCellHPadding();
getIpad().right = UIUtil.getListCellHPadding();
}
public Component getListCellRendererComponent(JList list, Object value, int index, boolean selected, boolean hasFocus) {
clear();
if (myComboBox != null) {
setEnabled(myComboBox.isEnabled());
}
setFont(list.getFont());
mySelected = selected;
myForeground = list.getForeground();
mySelectionForeground = list.getSelectionForeground();
if (UIUtil.isWinLafOnVista()) {
// the system draws a gradient background on the combobox selected item - don't overdraw it with our solid background
if (index == -1) {
setOpaque(false);
mySelected = false;
}
else {
setOpaque(true);
setBackground(selected ? list.getSelectionBackground() : null);
}
}
else {
setBackground(selected ? list.getSelectionBackground() : null);
}
setPaintFocusBorder(hasFocus);
customizeCellRenderer(list, (T)value, index, selected, hasFocus);
if (myDefaultGtkRenderer != null && list.getModel() instanceof ComboBoxModel) {
final Component component = myDefaultGtkRenderer.getListCellRendererComponent(list, value, index, selected, hasFocus);
if (component instanceof JLabel) {
return formatToLabel((JLabel)component);
}
}
return this;
}
/**
* When the item is selected then we use default tree's selection foreground.
* It guaranties readability of selected text in any LAF.
*/
public final void append(@NotNull String fragment, @NotNull SimpleTextAttributes attributes, boolean isMainText) {
if (mySelected) {
super.append(fragment, new SimpleTextAttributes(attributes.getStyle(), mySelectionForeground), isMainText);
}
else if (attributes.getFgColor() == null) {
super.append(fragment, new SimpleTextAttributes(attributes.getStyle(), myForeground), isMainText);
}
else {
super.append(fragment, attributes, isMainText);
}
}
@NotNull
public Dimension getPreferredSize() {
// There is a bug in BasicComboPopup. It does not add renderer into CellRendererPane,
// so font can be null here.
Font oldFont = getFont();
if (oldFont == null) {
setFont(UIUtil.getListFont());
}
Dimension result = super.getPreferredSize();
if (oldFont == null) {
setFont(null);
}
return result;
}
protected abstract void customizeCellRenderer(JList list, T value, int index, boolean selected, boolean hasFocus);
}
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