net.miginfocom.swing.MigLayout Maven / Gradle / Ivy
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package net.miginfocom.swing;
/*
* License (BSD):
* ==============
*
* Copyright (c) 2004, Mikael Grev, MiG InfoCom AB. (miglayout (at) miginfocom (dot) com)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
* Neither the name of the MiG InfoCom AB nor the names of its contributors may be
* used to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
* @version 1.0
* @author Mikael Grev, MiG InfoCom AB
* Date: 2006-sep-08
*/
import net.miginfocom.layout.*;
import javax.swing.*;
import javax.swing.Timer;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.*;
import java.lang.ref.WeakReference;
import java.util.*;
/** A very flexbile layout manager.
*
* Read the documentation that came with this layout manager for information on usage.
*/
public final class MigLayout implements LayoutManager2, Externalizable
{
// ******** Instance part ********
/** The component to string constraints mappings.
*/
private final Map scrConstrMap = new IdentityHashMap(8);
/** Hold the serializable text representation of the constraints.
*/
private Object layoutConstraints = "", colConstraints = "", rowConstraints = ""; // Should never be null!
// ******** Transient part ********
private transient ContainerWrapper cacheParentW = null;
private transient final Map ccMap = new HashMap(8);
private transient javax.swing.Timer debugTimer = null;
private transient LC lc = null;
private transient AC colSpecs = null, rowSpecs = null;
private transient Grid grid = null;
private transient int lastModCount = PlatformDefaults.getModCount();
private transient int lastHash = -1;
private transient Dimension lastInvalidSize = null;
private transient ArrayList callbackList = null;
private transient boolean dirty = true;
/** Constructor with no constraints.
*/
public MigLayout()
{
this("", "", "");
}
/** Constructor.
* @param layoutConstraints The constraints that concern the whole layout. null will be treated as "".
*/
public MigLayout(String layoutConstraints)
{
this(layoutConstraints, "", "");
}
/** Constructor.
* @param layoutConstraints The constraints that concern the whole layout. null will be treated as "".
* @param colConstraints The constraints for the columns in the grid. null will be treated as "".
*/
public MigLayout(String layoutConstraints, String colConstraints)
{
this(layoutConstraints, colConstraints, "");
}
/** Constructor.
* @param layoutConstraints The constraints that concern the whole layout. null will be treated as "".
* @param colConstraints The constraints for the columns in the grid. null will be treated as "".
* @param rowConstraints The constraints for the rows in the grid. null will be treated as "".
*/
public MigLayout(String layoutConstraints, String colConstraints, String rowConstraints)
{
setLayoutConstraints(layoutConstraints);
setColumnConstraints(colConstraints);
setRowConstraints(rowConstraints);
}
/** Constructor.
* @param layoutConstraints The constraints that concern the whole layout. null will be treated as an empty cosntraint.
*/
public MigLayout(LC layoutConstraints)
{
this(layoutConstraints, null, null);
}
/** Constructor.
* @param layoutConstraints The constraints that concern the whole layout. null will be treated as an empty cosntraint.
* @param colConstraints The constraints for the columns in the grid. null will be treated as an empty constraint.
*/
public MigLayout(LC layoutConstraints, AC colConstraints)
{
this(layoutConstraints, colConstraints, null);
}
/** Constructor.
* @param layoutConstraints The constraints that concern the whole layout. null will be treated as an empty cosntraint.
* @param colConstraints The constraints for the columns in the grid. null will be treated as an empty constraint.
* @param rowConstraints The constraints for the rows in the grid. null will be treated as an empty constraint.
*/
public MigLayout(LC layoutConstraints, AC colConstraints, AC rowConstraints)
{
setLayoutConstraints(layoutConstraints);
setColumnConstraints(colConstraints);
setRowConstraints(rowConstraints);
}
/** Returns layout constraints either as a String or {@link net.miginfocom.layout.LC} depending what was sent in
* to the constructor or set with {@link #setLayoutConstraints(Object)}.
* @return The layout constraints either as a String or {@link net.miginfocom.layout.LC} depending what was sent in
* to the constructor or set with {@link #setLayoutConstraints(Object)}. Never null.
*/
public Object getLayoutConstraints()
{
return layoutConstraints;
}
/** Sets the layout constraints for the layout manager instance as a String.
*
* See the class JavaDocs for information on how this string is formatted.
* @param constr The layout constraints as a String representation. null is converted to "" for storage.
* @throws RuntimeException if the constaint was not valid.
*/
public void setLayoutConstraints(Object constr)
{
if (constr == null || constr instanceof String) {
constr = ConstraintParser.prepare((String) constr);
lc = ConstraintParser.parseLayoutConstraint((String) constr);
} else if (constr instanceof LC) {
lc = (LC) constr;
} else {
throw new IllegalArgumentException("Illegal constraint type: " + constr.getClass().toString());
}
layoutConstraints = constr;
dirty = true;
}
/** Returns the column layout constraints either as a String or {@link net.miginfocom.layout.AC}.
* @return The column constraints either as a String or {@link net.miginfocom.layout.LC} depending what was sent in
* to the constructor or set with {@link #setLayoutConstraints(Object)}. Never null.
*/
public Object getColumnConstraints()
{
return colConstraints;
}
/** Sets the column layout constraints for the layout manager instance as a String.
*
* See the class JavaDocs for information on how this string is formatted.
* @param constr The column layout constraints as a String representation. null is converted to "" for storage.
* @throws RuntimeException if the constaint was not valid.
*/
public void setColumnConstraints(Object constr)
{
if (constr == null || constr instanceof String) {
constr = ConstraintParser.prepare((String) constr);
colSpecs = ConstraintParser.parseColumnConstraints((String) constr);
} else if (constr instanceof AC) {
colSpecs = (AC) constr;
} else {
throw new IllegalArgumentException("Illegal constraint type: " + constr.getClass().toString());
}
colConstraints = constr;
dirty = true;
}
/** Returns the row layout constraints as a String representation. This string is the exact string as set with {@link #setRowConstraints(Object)}
* or sent into the constructor.
*
* See the class JavaDocs for information on how this string is formatted.
* @return The row layout constraints as a String representation. Never null.
*/
public Object getRowConstraints()
{
return rowConstraints;
}
/** Sets the row layout constraints for the layout manager instance as a String.
*
* See the class JavaDocs for information on how this string is formatted.
* @param constr The row layout constraints as a String representation. null is converted to "" for storage.
* @throws RuntimeException if the constaint was not valid.
*/
public void setRowConstraints(Object constr)
{
if (constr == null || constr instanceof String) {
constr = ConstraintParser.prepare((String) constr);
rowSpecs = ConstraintParser.parseRowConstraints((String) constr);
} else if (constr instanceof AC) {
rowSpecs = (AC) constr;
} else {
throw new IllegalArgumentException("Illegal constraint type: " + constr.getClass().toString());
}
rowConstraints = constr;
dirty = true;
}
/** Returns a shallow copy of the constraints map.
* @return A shallow copy of the constraints map. Never null.
*/
public Map getConstraintMap()
{
return new IdentityHashMap(scrConstrMap);
}
/** Sets the constraints map.
* @param map The map. Will be copied.
*/
public void setConstraintMap(Map map)
{
scrConstrMap.clear();
ccMap.clear();
for (Map.Entry e : map.entrySet())
setComponentConstraintsImpl(e.getKey(), e.getValue(), true);
}
/** Returns the component constraints as a String representation. This string is the exact string as set with {@link #setComponentConstraints(java.awt.Component, Object)}
* or set when adding the component to the parent component.
*
* See the class JavaDocs for information on how this string is formatted.
* @param comp The component to return the constraints for.
* @return The component constraints as a String representation or null if the component is not registered
* with this layout manager. The returned values is either a String or a {@link net.miginfocom.layout.CC}
* depending on what constraint was sent in when the component was added. May be null.
*/
public Object getComponentConstraints(Component comp)
{
synchronized(comp.getParent().getTreeLock()) {
return scrConstrMap.get(comp);
}
}
/** Sets the component constraint for the component that already must be handleded by this layout manager.
*
* See the class JavaDocs for information on how this string is formatted.
* @param constr The component constraints as a String or {@link net.miginfocom.layout.CC}. null is ok.
* @param comp The component to set the constraints for.
* @throws RuntimeException if the constaint was not valid.
* @throws IllegalArgumentException If the component is not handlering the component.
*/
public void setComponentConstraints(Component comp, Object constr)
{
setComponentConstraintsImpl(comp, constr, false);
}
/** Sets the component constraint for the component that already must be handleded by this layout manager.
*
* See the class JavaDocs for information on how this string is formatted.
* @param constr The component constraints as a String or {@link net.miginfocom.layout.CC}. null is ok.
* @param comp The component to set the constraints for.
* @param noCheck Doe not check if the component is handled if true
* @throws RuntimeException if the constaint was not valid.
* @throws IllegalArgumentException If the component is not handling the component.
*/
private void setComponentConstraintsImpl(Component comp, Object constr, boolean noCheck)
{
Container parent = comp.getParent();
synchronized(parent.getTreeLock()) {
if (noCheck == false && scrConstrMap.containsKey(comp) == false)
throw new IllegalArgumentException("Component must already be added to parent!");
ComponentWrapper cw = new SwingComponentWrapper(comp);
if (constr == null || constr instanceof String) {
String cStr = ConstraintParser.prepare((String) constr);
scrConstrMap.put(comp, constr);
ccMap.put(cw, ConstraintParser.parseComponentConstraint(cStr));
} else if (constr instanceof CC) {
scrConstrMap.put(comp, constr);
ccMap.put(cw, (CC) constr);
} else {
throw new IllegalArgumentException("Constraint must be String or ComponentConstraint: " + constr.getClass().toString());
}
dirty = true;
}
}
/** Returns if this layout manager is currently managing this component.
* @param c The component to check. If null then false will be returned.
* @return If this layout manager is currently managing this component.
*/
public boolean isManagingComponent(Component c)
{
return scrConstrMap.containsKey(c);
}
/** Adds the callback function that will be called at different stages of the layout cylce.
* @param callback The callback. Not null.
*/
public void addLayoutCallback(LayoutCallback callback)
{
if (callback == null)
throw new NullPointerException();
if (callbackList == null)
callbackList = new ArrayList(1);
callbackList.add(callback);
}
/** Removes the callback if it exists.
* @param callback The callback. May be null.
*/
public void removeLayoutCallback(LayoutCallback callback)
{
if (callbackList != null)
callbackList.remove(callback);
}
/** Sets the debugging state for this layout manager instance. If debug is turned on a timer will repaint the last laid out parent
* with debug information on top.
*
* Red fill and dashed darked red outline is used to indicate occupied cells in the grid. Blue dashed outline indicate indicate
* component bounds set.
*
* Note that debug can also be set on the layout constraints. There it will be persisted. The value set here will not. See the class
* JavaDocs for information.
* @param parentW The parent to set debug for.
* @param b true means debug is turned on.
*/
private synchronized void setDebug(final ComponentWrapper parentW, boolean b)
{
if (b && (debugTimer == null || debugTimer.getDelay() != getDebugMillis())) {
if (debugTimer != null)
debugTimer.stop();
ContainerWrapper pCW = parentW.getParent();
final Component parent = pCW != null ? (Component) pCW.getComponent() : null;
debugTimer = new Timer(getDebugMillis(), new MyDebugRepaintListener(MigLayout.this));
if (parent != null) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
Container p = parent.getParent();
if (p != null) {
if (p instanceof JComponent) {
((JComponent) p).revalidate();
} else {
parent.invalidate();
p.validate();
}
}
}
});
}
debugTimer.setInitialDelay(100);
debugTimer.start();
} else if (!b && debugTimer != null) {
debugTimer.stop();
debugTimer = null;
}
}
/** Returns the current debugging state.
* @return The current debugging state.
*/
private boolean getDebug()
{
return debugTimer != null;
}
/** Returns the debug millis. Combines the value from {@link net.miginfocom.layout.LC#getDebugMillis()} and {@link net.miginfocom.layout.LayoutUtil#getGlobalDebugMillis()}
* @return The combined value.
*/
private int getDebugMillis()
{
int globalDebugMillis = LayoutUtil.getGlobalDebugMillis();
return globalDebugMillis > 0 ? globalDebugMillis : lc.getDebugMillis();
}
/** Check if something has changed and if so recrete it to the cached objects.
* @param parent The parent that is the target for this layout manager.
*/
private void checkCache(Container parent)
{
if (parent == null)
return;
if (dirty)
grid = null;
// Check if the grid is valid
int mc = PlatformDefaults.getModCount();
if (lastModCount != mc) {
grid = null;
lastModCount = mc;
}
if (parent.isValid() == false) {
int hash = 0;
for (Iterator it = ccMap.keySet().iterator(); it.hasNext();)
hash += it.next().getLayoutHashCode();
if (hash != lastHash) {
grid = null;
lastHash = hash;
}
Dimension ps = parent.getSize();
if (lastInvalidSize == null || !lastInvalidSize.equals(ps)) {
if (grid != null)
grid.invalidateContainerSize();
lastInvalidSize = ps;
}
}
ContainerWrapper par = checkParent(parent);
setDebug(par, getDebugMillis() > 0);
if (grid == null)
grid = new Grid(par, lc, rowSpecs, colSpecs, ccMap, callbackList);
dirty = false;
}
private ContainerWrapper checkParent(Container parent)
{
if (parent == null)
return null;
if (cacheParentW == null || cacheParentW.getComponent() != parent)
cacheParentW = new SwingContainerWrapper(parent);
return cacheParentW;
}
private long lastSize = 0;
public void layoutContainer(final Container parent)
{
synchronized(parent.getTreeLock()) {
checkCache(parent);
Insets i = parent.getInsets();
int[] b = new int[] {
i.left,
i.top,
parent.getWidth() - i.left - i.right,
parent.getHeight() - i.top - i.bottom
};
if (grid.layout(b, lc.getAlignX(), lc.getAlignY(), getDebug(), true)) {
grid = null;
checkCache(parent);
grid.layout(b, lc.getAlignX(), lc.getAlignY(), getDebug(), false);
}
long newSize = grid.getHeight()[1] + (((long) grid.getWidth()[1]) << 32);
if (lastSize != newSize) {
lastSize = newSize;
SwingUtilities.invokeLater(new Runnable() { // Added 2008-12-04
public void run() {
adjustWindowSize(checkParent(parent));
}
});
}
lastInvalidSize = null;
}
}
/** Checks the parent window if its size is within parameters as set by the LC.
* @param parent The parent who's window to possibly adjust the size for.
*/
private void adjustWindowSize(ContainerWrapper parent)
{
BoundSize wBounds = lc.getPackWidth();
BoundSize hBounds = lc.getPackHeight();
if (wBounds == null && hBounds == null)
return;
Window win = ((Window) SwingUtilities.getAncestorOfClass(Window.class, (Component) parent.getComponent()));
if (win == null)
return;
Dimension prefSize = win.getPreferredSize();
int targW = constrain(checkParent(win), win.getWidth(), prefSize.width, wBounds);
int targH = constrain(checkParent(win), win.getHeight(), prefSize.height, hBounds);
int x = Math.round(win.getX() - ((targW - win.getWidth()) * (1 - lc.getPackWidthAlign())));
int y = Math.round(win.getY() - ((targH - win.getHeight()) * (1 - lc.getPackHeightAlign())));
win.setBounds(x, y, targW, targH);
}
private int constrain(ContainerWrapper parent, int winSize, int prefSize, BoundSize constrain)
{
if (constrain == null)
return winSize;
int retSize = winSize;
UnitValue wUV = constrain.getPreferred();
if (wUV != null)
retSize = wUV.getPixels(prefSize, parent, parent);
retSize = constrain.constrain(retSize, prefSize, parent);
return constrain.getGapPush() ? Math.max(winSize, retSize) : retSize;
}
public Dimension minimumLayoutSize(Container parent)
{
synchronized(parent.getTreeLock()) {
return getSizeImpl(parent, LayoutUtil.MIN);
}
}
public Dimension preferredLayoutSize(Container parent)
{
synchronized(parent.getTreeLock()) {
return getSizeImpl(parent, LayoutUtil.PREF);
}
}
public Dimension maximumLayoutSize(Container parent)
{
return new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);
}
// Implementation method that does the job.
private Dimension getSizeImpl(Container parent, int sizeType)
{
checkCache(parent);
Insets i = parent.getInsets();
int w = LayoutUtil.getSizeSafe(grid != null ? grid.getWidth() : null, sizeType) + i.left + i.right;
int h = LayoutUtil.getSizeSafe(grid != null ? grid.getHeight() : null, sizeType) + i.top + i.bottom;
return new Dimension(w, h);
}
public float getLayoutAlignmentX(Container parent)
{
return lc != null && lc.getAlignX() != null ? lc.getAlignX().getPixels(1, checkParent(parent), null) : 0;
}
public float getLayoutAlignmentY(Container parent)
{
return lc != null && lc.getAlignY() != null ? lc.getAlignY().getPixels(1, checkParent(parent), null) : 0;
}
public void addLayoutComponent(String s, Component comp)
{
addLayoutComponent(comp, s);
}
public void addLayoutComponent(Component comp, Object constraints)
{
synchronized(comp.getParent().getTreeLock()) {
setComponentConstraintsImpl(comp, constraints, true);
}
}
public void removeLayoutComponent(Component comp)
{
synchronized(comp.getParent().getTreeLock()) {
scrConstrMap.remove(comp);
ccMap.remove(new SwingComponentWrapper(comp));
}
}
public void invalidateLayout(Container target)
{
// if (lc.isNoCache()) // Commented for 3.5 since there was too often that the "nocache" was needed and the user did not know.
dirty = true;
// the validity of components is maintained automatically.
}
// ************************************************
// Persistence Delegate and Serializable combined.
// ************************************************
private Object readResolve() throws ObjectStreamException
{
return LayoutUtil.getSerializedObject(this);
}
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
{
LayoutUtil.setSerializedObject(this, LayoutUtil.readAsXML(in));
}
public void writeExternal(ObjectOutput out) throws IOException
{
if (getClass() == MigLayout.class)
LayoutUtil.writeAsXML(out, this);
}
private static class MyDebugRepaintListener implements ActionListener
{
private final WeakReference layoutRef;
private MyDebugRepaintListener(MigLayout layout)
{
this.layoutRef = new WeakReference(layout);
}
public void actionPerformed(ActionEvent e)
{
MigLayout layout = layoutRef.get();
if (layout != null && layout.grid != null)
layout.grid.paintDebug();
}
}
}