概要
概要
JComboBoxのEditorComponentにJButtonやJLabelなどを配置します。
Screenshot
サンプルコード
サンプルコード
#spandel
combo02.setLayout(new LayoutManager() {
#spanend
@Override public void addLayoutComponent(String name, Component comp) {}
@Override public void removeLayoutComponent(Component comp) {}
#spanadd
class SiteComboBoxLayout implements LayoutManager {
#spanend
private final JLabel favicon;
private final JButton feedButton;
#spanadd
#spanend
protected SiteComboBoxLayout(JLabel favicon, JButton feedButton) {
this.favicon = favicon;
this.feedButton = feedButton;
}
#spanadd
#spanend
@Override public void addLayoutComponent(String name, Component comp) {
/* not needed */
}
#spanadd
#spanend
@Override public void removeLayoutComponent(Component comp) {
/* not needed */
}
#spanadd
#spanend
@Override public Dimension preferredLayoutSize(Container parent) {
return parent.getPreferredSize();
}
#spanadd
#spanend
@Override public Dimension minimumLayoutSize(Container parent) {
return parent.getMinimumSize();
}
#spanadd
#spanend
@Override public void layoutContainer(Container parent) {
if(!(parent instanceof JComboBox)) return;
JComboBox cb = (JComboBox)parent;
int width = cb.getWidth();
int height = cb.getHeight();
Insets insets = cb.getInsets();
int buttonHeight = height - (insets.top + insets.bottom);
int buttonWidth = buttonHeight;
int labelWidth = buttonHeight;
int loupeWidth = buttonHeight;
if (!(parent instanceof JComboBox)) {
return;
}
JComboBox<?> cb = (JComboBox<?>) parent;
int width = cb.getWidth();
int height = cb.getHeight();
Insets insets = cb.getInsets();
int arrowHeight = height - insets.top - insets.bottom;
int arrowWidth = arrowHeight;
int faviconWidth = arrowHeight;
int feedWidth; // = arrowHeight;
JButton arrowButton = (JButton)cb.getComponent(0);
if(arrowButton != null) {
// Arrow Icon JButton
JButton arrowButton = (JButton) cb.getComponent(0);
if (Objects.nonNull(arrowButton)) {
Insets arrowInsets = arrowButton.getInsets();
buttonWidth = arrowButton.getPreferredSize().width
arrowWidth = arrowButton.getPreferredSize().width
+ arrowInsets.left + arrowInsets.right;
arrowButton.setBounds(width - (insets.right + buttonWidth),
insets.top, buttonWidth, buttonHeight);
arrowButton.setBounds(width - insets.right - arrowWidth, insets.top,
arrowWidth, arrowHeight);
}
if(label != null) {
Insets labelInsets = label.getInsets();
labelWidth = label.getPreferredSize().width
+ labelInsets.left + labelInsets.right;
label.setBounds(insets.left, insets.top, labelWidth, buttonHeight);
#spanadd
#spanend
// Favicon JLabel
if (Objects.nonNull(favicon)) {
Insets faviconInsets = favicon.getInsets();
faviconWidth = favicon.getPreferredSize().width
+ faviconInsets.left + faviconInsets.right;
favicon.setBounds(insets.left, insets.top, faviconWidth, arrowHeight);
}
JButton rssButton = button;
if(rssButton != null && rssButton.isVisible()) {
Insets loupeInsets = rssButton.getInsets();
loupeWidth = rssButton.getPreferredSize().width
+ loupeInsets.left + loupeInsets.right;
rssButton.setBounds(width - (insets.right + loupeWidth + buttonWidth),
insets.top, loupeWidth, buttonHeight);
}else{
loupeWidth = 0;
#spanadd
#spanend
// Feed Icon JButton
if (Objects.nonNull(feedButton) && feedButton.isVisible()) {
Insets feedInsets = feedButton.getInsets();
feedWidth = feedButton.getPreferredSize().width
+ feedInsets.left + feedInsets.right;
feedButton.setBounds(width - insets.right - feedWidth - arrowWidth, insets.top,
feedWidth, arrowHeight);
} else {
feedWidth = 0;
}
// JComboBox Editor
Component editor = cb.getEditor().getEditorComponent();
if ( editor != null ) {
editor.setBounds(insets.left + labelWidth, insets.top,
width -(insets.left+insets.right+buttonWidth+labelWidth+loupeWidth),
height-(insets.top +insets.bottom));
if (Objects.nonNull(editor)) {
editor.setBounds(insets.left + faviconWidth, insets.top,
width - insets.left - insets.right - arrowWidth - faviconWidth - feedWidth,
height - insets.top - insets.bottom);
}
}
#spandel
});
#spanend
#spanadd
}
#spanend
View in GitHub: Java, Kotlin解説
上記のサンプルでは、JComboBoxに独自のレイアウトマネージャーを設定して、JButtonやJLabelを配置しています。
解説
上記のサンプルでは、JComboBoxに独自のレイアウトマネージャーを設定して、そのエディタ内部にデフォルトのArrowButtonとは異なるJButtonやJLabelを追加で配置しています。
-
JButtonにFeedアイコンを設定してArrowButtonの左側に追加配置
-
EditorComponentにフォーカスがある場合このFeedButtonは非表示
-
JLabelにFaviconを設定して左端に追加配置
RolloverIconは、元のアイコンに以下のようなフィルタを掛けて作成しています。
-
RolloverIconは元のアイコンに以下のようなフィルタを掛けて作成している
#spanadd
// RGBImageFilter を使用
#spanend
private static ImageIcon makeFilteredImage(ImageIcon srcIcon) {
RGBImageFilter filter = new SelectedImageFilter();
FilteredImageSource fis = new FilteredImageSource(srcIcon.getImage().getSource(), filter);
FilteredImageSource fis = new FilteredImageSource(
srcIcon.getImage().getSource(), filter);
return new ImageIcon(Toolkit.getDefaultToolkit().createImage(fis));
}
#spandel
static class SelectedImageFilter extends RGBImageFilter {
#spanend
public SelectedImageFilter() {
canFilterIndexColorModel = false;
#spanadd
#spanend
#spanadd
class SelectedImageFilter extends RGBImageFilter {
#spanend
private static final float SCALE = 1.2f;
@Override public int filterRGB(int x, int y, int argb) {
// int a = (argb >> 24) & 0xFF;
int r = (int) Math.min(0xFF, ((argb >> 16) & 0xFF) * SCALE);
int g = (int) Math.min(0xFF, ((argb >> 8) & 0xFF) * SCALE);
int b = (int) Math.min(0xFF, ((argb) & 0xFF) * SCALE);
return (argb & 0xFF_00_00_00) | (r << 16) | (g << 8) | (b);
}
private final float scale = 1.2f;
public int filterRGB(int x, int y, int argb) {
//int a = (argb >> 24) & 0xff;
int r = (argb >> 16) & 0xff;
int g = (argb >> 8) & 0xff;
int b = (argb) & 0xff;
r = (int)(r*scale);
g = (int)(g*scale);
b = (int)(b*scale);
if(r > 255) r = 255;
if(g > 255) g = 255;
if(b > 255) b = 255;
return (argb & 0xff000000) | (r<<16) | (g<<8) | (b);
}
}
#spandel
#spanend
#spanadd
// RescaleOp を使用
#spanend
private static ImageIcon makeFilteredImage2(ImageIcon srcIcon) {
RescaleOp op = new RescaleOp(
new float[] { 1.2f,1.2f,1.2f,1.0f },
new float[] { 0f,0f,0f,0f }, null);
new float[] { 1.2f, 1.2f, 1.2f, 1f },
new float[] { 0f, 0f, 0f, 0f }, null);
BufferedImage img = new BufferedImage(
srcIcon.getIconWidth(), srcIcon.getIconHeight(), BufferedImage.TYPE_INT_ARGB);
Graphics g = img.getGraphics();
//g.drawImage(srcIcon.getImage(), 0, 0, null);
srcIcon.paintIcon(null, g, 0, 0);
g.dispose();
return new ImageIcon(op.filter(img, null));
}
参考リンク
参考リンク
コメント
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