/**
* Returns the amount of space the layout would like to have.
*
* @param the Container for which this layout manager is being used
* @return a Dimension object containing the layout's preferred size
*/
public Dimension preferredLayoutSize(Container parent) {
Dimension cpd, tpd;
int cpWidth = 0;
int cpHeight = 0;
int mbWidth = 0;
int mbHeight = 0;
int tpWidth = 0;
Insets i = parent.getInsets();
JRootPane root = (JRootPane) parent;
if (root.getContentPane() != null) {
cpd = root.getContentPane().getPreferredSize();
} else {
cpd = root.getSize();
}
if (cpd != null) {
cpWidth = cpd.width;
cpHeight = cpd.height;
}
if (root.getWindowDecorationStyle() != JRootPane.NONE
&& (root.getUI() instanceof RootPaneUI)) {
JComponent titlePane = ((RootPaneUI) root.getUI()).getTitlePane();
if (titlePane != null) {
tpd = titlePane.getPreferredSize();
if (tpd != null) {
tpWidth = tpd.width;
}
}
}
return new Dimension(
Math.max(Math.max(cpWidth, mbWidth), tpWidth) + i.left + i.right,
cpHeight + mbHeight + tpWidth + i.top + i.bottom);
}
/**
* Instructs the layout manager to perform the layout for the specified container.
*
* @param the Container for which this layout manager is being used
*/
public void layoutContainer(Container parent) {
JRootPane root = (JRootPane) parent;
Rectangle b = root.getBounds();
Insets i = root.getInsets();
int nextY = 0;
int w = b.width - i.right - i.left;
int h = b.height - i.top - i.bottom;
if (root.getLayeredPane() != null) {
root.getLayeredPane().setBounds(i.left, i.top, w, h);
}
if (root.getGlassPane() != null) {
root.getGlassPane().setBounds(i.left, i.top, w, h);
}
// Note: This is laying out the children in the layeredPane,
// technically, these are not our children.
if (root.getWindowDecorationStyle() != JRootPane.NONE
&& (root.getUI() instanceof RootPaneUI)) {
JComponent titlePane = ((RootPaneUI) root.getUI()).getTitlePane();
if (titlePane != null) {
Dimension tpd = titlePane.getPreferredSize();
if (tpd != null) {
int tpHeight = tpd.height;
titlePane.setBounds(0, 0, w, tpHeight);
nextY += tpHeight;
}
}
}
if (root.getContentPane() != null) {
root.getContentPane().setBounds(0, nextY, w, h < nextY ? 0 : h - nextY);
}
}
private void updateLabelSizes() {
Dictionary labelTable = getLabelTable();
if (labelTable != null) {
Enumeration labels = labelTable.elements();
while (labels.hasMoreElements()) {
JComponent component = (JComponent) labels.nextElement();
component.setSize(component.getPreferredSize());
}
}
}
/**
* Updates the UIs for the labels in the label table by calling {@code updateUI} on each label.
* The UIs are updated from the current look and feel. The labels are also set to their preferred
* size.
*
* @see #setLabelTable
* @see JComponent#updateUI
*/
protected void updateLabelUIs() {
Dictionary labelTable = getLabelTable();
if (labelTable == null) {
return;
}
Enumeration labels = labelTable.keys();
while (labels.hasMoreElements()) {
JComponent component = (JComponent) labelTable.get(labels.nextElement());
component.updateUI();
component.setSize(component.getPreferredSize());
}
}
/**
* Paints the border for the specified component with the specified position and size.
*
* @param c the component for which this border is being painted
* @param g the paint graphics
* @param x the x position of the painted border
* @param y the y position of the painted border
* @param width the width of the painted border
* @param height the height of the painted border
*/
public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
Border border = getBorder();
if (label == null) {
if (border != null) {
border.paintBorder(c, g, x, y, width, height);
}
return;
}
Rectangle grooveRect =
new Rectangle(
x + EDGE_SPACING,
y + EDGE_SPACING,
width - (EDGE_SPACING * 2),
height - (EDGE_SPACING * 2));
Dimension labelDim = label.getPreferredSize();
int baseline = label.getBaseline(labelDim.width, labelDim.height);
int ascent = Math.max(0, baseline);
int descent = labelDim.height - ascent;
int diff;
Insets insets;
if (border != null) {
insets = border.getBorderInsets(c);
} else {
insets = new Insets(0, 0, 0, 0);
}
diff = Math.max(0, ascent / 2 + TEXT_SPACING - EDGE_SPACING);
grooveRect.y += diff;
grooveRect.height -= diff;
compLoc.y = grooveRect.y + insets.top / 2 - (ascent + descent) / 2 - 1;
int justification;
if (c.getComponentOrientation().isLeftToRight()) {
justification = LEFT;
} else {
justification = RIGHT;
}
switch (justification) {
case LEFT:
compLoc.x = grooveRect.x + TEXT_INSET_H + insets.left;
break;
case RIGHT:
compLoc.x =
(grooveRect.x + grooveRect.width - (labelDim.width + TEXT_INSET_H + insets.right));
break;
}
// If title is positioned in middle of border AND its fontsize
// is greater than the border's thickness, we'll need to paint
// the border in sections to leave space for the component's background
// to show through the title.
//
if (border != null) {
if (grooveRect.y > compLoc.y - ascent) {
Rectangle clipRect = new Rectangle();
// save original clip
Rectangle saveClip = g.getClipBounds();
// paint strip left of text
clipRect.setBounds(saveClip);
if (computeIntersection(clipRect, x, y, compLoc.x - 1 - x, height)) {
g.setClip(clipRect);
border.paintBorder(
c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
// paint strip right of text
clipRect.setBounds(saveClip);
if (computeIntersection(
clipRect,
compLoc.x + labelDim.width + 1,
y,
x + width - (compLoc.x + labelDim.width + 1),
height)) {
g.setClip(clipRect);
border.paintBorder(
c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
// paint strip below text
clipRect.setBounds(saveClip);
if (computeIntersection(
clipRect,
compLoc.x - 1,
compLoc.y + ascent + descent,
labelDim.width + 2,
y + height - compLoc.y - ascent - descent)) {
g.setClip(clipRect);
border.paintBorder(
c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
// restore clip
g.setClip(saveClip);
} else {
border.paintBorder(c, g, grooveRect.x, grooveRect.y, grooveRect.width, grooveRect.height);
}
label.setLocation(compLoc);
label.setSize(labelDim);
}
}