/** * 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); } }