/*******************************************************************************
* Copyright (c) 2000, 2010, 2012 IBM Corporation, Gerhardt Informatics Kft. and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Gerhardt Informatics Kft. - GEFGWT port
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.events.ControlListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Image;
/**
* Instances of this class represent a column in a tree widget.
* <p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>LEFT, RIGHT, CENTER</dd>
* <dt><b>Events:</b></dt>
* <dd>Move, Resize, Selection</dd>
* </dl>
* </p>
* <p>
* Note: Only one of the styles LEFT, RIGHT and CENTER may be specified.
* </p>
* <p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see <a href="http://www.eclipse.org/swt/snippets/#tree">Tree, TreeItem,
* TreeColumn snippets</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further
* information</a>
*
* @since 3.1
* @noextend This class is not intended to be subclassed by clients.
*/
public class TreeColumn extends Item {
long /* int */labelHandle, imageHandle, buttonHandle;
Tree parent;
int modelIndex, lastButton, lastTime, lastX, lastWidth;
boolean customDraw, useFixedWidth;
String toolTipText;
/**
* Constructs a new instance of this class given its parent (which must be a
* <code>Tree</code>) and a style value describing its behavior and
* appearance. The item is added to the end of the items maintained by its
* parent.
* <p>
* The style value is either one of the style constants defined in class
* <code>SWT</code> which is applicable to instances of this class, or must
* be built by <em>bitwise OR</em>'ing together (that is, using the
* <code>int</code> "|" operator) two or more of those <code>SWT</code>
* style constants. The class description lists the style constants that are
* applicable to the class. Style bits are also inherited from superclasses.
* </p>
*
* @param parent
* a composite control which will be the parent of the new
* instance (cannot be null)
* @param style
* the style of control to construct
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an
* allowed subclass</li>
* </ul>
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public TreeColumn(Tree parent, int style) {
super(parent, checkStyle(style));
this.parent = parent;
createWidget(parent.getColumnCount());
}
/**
* Constructs a new instance of this class given its parent (which must be a
* <code>Tree</code>), a style value describing its behavior and appearance,
* and the index at which to place it in the items maintained by its parent.
* <p>
* The style value is either one of the style constants defined in class
* <code>SWT</code> which is applicable to instances of this class, or must
* be built by <em>bitwise OR</em>'ing together (that is, using the
* <code>int</code> "|" operator) two or more of those <code>SWT</code>
* style constants. The class description lists the style constants that are
* applicable to the class. Style bits are also inherited from superclasses.
* </p>
* <p>
* Note that due to a restriction on some platforms, the first column is
* always left aligned.
* </p>
*
* @param parent
* a composite control which will be the parent of the new
* instance (cannot be null)
* @param style
* the style of control to construct
* @param index
* the zero-relative index to store the receiver in its parent
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* <li>ERROR_INVALID_RANGE - if the index is not between 0
* and the number of elements in the parent (inclusive)</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the parent</li>
* <li>ERROR_INVALID_SUBCLASS - if this class is not an
* allowed subclass</li>
* </ul>
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public TreeColumn(Tree parent, int style, int index) {
super(parent, checkStyle(style));
this.parent = parent;
createWidget(index);
}
/**
* Adds the listener to the collection of listeners who will be notified
* when the control is moved or resized, by sending it one of the messages
* defined in the <code>ControlListener</code> interface.
*
* @param listener
* the listener which should be notified
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @see ControlListener
* @see #removeControlListener
*/
public void addControlListener(ControlListener listener) {
checkWidget();
if (listener == null)
error(SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Resize, typedListener);
addListener(SWT.Move, typedListener);
}
/**
* Adds the listener to the collection of listeners who will be notified
* when the control is selected by the user, by sending it one of the
* messages defined in the <code>SelectionListener</code> interface.
* <p>
* <code>widgetSelected</code> is called when the column header is selected.
* <code>widgetDefaultSelected</code> is not called.
* </p>
*
* @param listener
* the listener which should be notified when the control is
* selected by the user
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null)
error(SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Selection, typedListener);
addListener(SWT.DefaultSelection, typedListener);
}
static int checkStyle(int style) {
return checkBits(style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
}
protected void checkSubclass() {
if (!isValidSubclass())
error(SWT.ERROR_INVALID_SUBCLASS);
}
void createWidget(int index) {
parent.createItem(this, index);
setOrientation(true);
hookEvents();
register();
text = "";
}
void destroyWidget() {
parent.destroyItem(this);
releaseHandle();
}
/**
* Returns a value which describes the position of the text or image in the
* receiver. The value will be one of <code>LEFT</code>, <code>RIGHT</code>
* or <code>CENTER</code>.
*
* @return the alignment
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public int getAlignment() {
checkWidget();
if ((style & SWT.LEFT) != 0)
return SWT.LEFT;
if ((style & SWT.CENTER) != 0)
return SWT.CENTER;
if ((style & SWT.RIGHT) != 0)
return SWT.RIGHT;
return SWT.LEFT;
}
/**
* Gets the moveable attribute. A column that is not moveable cannot be
* reordered by the user by dragging the header but may be reordered by the
* programmer.
*
* @return the moveable attribute
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @see Tree#getColumnOrder()
* @see Tree#setColumnOrder(int[])
* @see TreeColumn#setMoveable(boolean)
* @see SWT#Move
*
* @since 3.2
*/
public boolean getMoveable() {
return false;
}
/**
* Returns the receiver's parent, which must be a <code>Tree</code>.
*
* @return the receiver's parent
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public Tree getParent() {
checkWidget();
return parent;
}
/**
* Gets the resizable attribute. A column that is not resizable cannot be
* dragged by the user but may be resized by the programmer.
*
* @return the resizable attribute
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public boolean getResizable() {
return false;
}
/**
* Returns the receiver's tool tip text, or null if it has not been set.
*
* @return the receiver's tool tip text
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @since 3.2
*/
public String getToolTipText() {
checkWidget();
return toolTipText;
}
/**
* Gets the width of the receiver.
*
* @return the width
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public int getWidth() {
return 0;
}
void hookEvents() {
}
/**
* Causes the receiver to be resized to its preferred size. For a composite,
* this involves computing the preferred size from its layout, if there is
* one.
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
*/
public void pack() {
}
void register() {
super.register();
if (buttonHandle != 0)
display.addWidget(buttonHandle, this);
if (labelHandle != 0)
display.addWidget(labelHandle, this);
}
void releaseHandle() {
super.releaseHandle();
modelIndex = -1;
parent = null;
}
void releaseParent() {
super.releaseParent();
if (parent.sortColumn == this) {
parent.sortColumn = null;
}
}
/**
* Removes the listener from the collection of listeners who will be
* notified when the control is moved or resized.
*
* @param listener
* the listener which should no longer be notified
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @see ControlListener
* @see #addControlListener
*/
public void removeControlListener(ControlListener listener) {
checkWidget();
if (listener == null)
error(SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null)
return;
eventTable.unhook(SWT.Move, listener);
eventTable.unhook(SWT.Resize, listener);
}
/**
* Removes the listener from the collection of listeners who will be
* notified when the control is selected by the user.
*
* @param listener
* the listener which should no longer be notified
*
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null)
error(SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null)
return;
eventTable.unhook(SWT.Selection, listener);
eventTable.unhook(SWT.DefaultSelection, listener);
}
/**
* Controls how text and images will be displayed in the receiver. The
* argument should be one of <code>LEFT</code>, <code>RIGHT</code> or
* <code>CENTER</code>.
* <p>
* Note that due to a restriction on some platforms, the first column is
* always left aligned.
* </p>
*
* @param alignment
* the new alignment
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public void setAlignment(int alignment) {
}
void setFontDescription(long /* int */font) {
}
public void setImage(Image image) {
}
/**
* Sets the moveable attribute. A column that is moveable can be reordered
* by the user by dragging the header. A column that is not moveable cannot
* be dragged by the user but may be reordered by the programmer.
*
* @param moveable
* the moveable attribute
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @see Tree#setColumnOrder(int[])
* @see Tree#getColumnOrder()
* @see TreeColumn#getMoveable()
* @see SWT#Move
*
* @since 3.2
*/
public void setMoveable(boolean moveable) {
}
void setOrientation(boolean create) {
}
/**
* Sets the resizable attribute. A column that is not resizable cannot be
* dragged by the user but may be resized by the programmer.
*
* @param resizable
* the resize attribute
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public void setResizable(boolean resizable) {
}
public void setText(String string) {
}
/**
* Sets the receiver's tool tip text to the argument, which may be null
* indicating that the default tool tip for the control will be shown. For a
* control that has a default tool tip, such as the Tree control on Windows,
* setting the tool tip text to an empty string replaces the default,
* causing no tool tip text to be shown.
* <p>
* The mnemonic indicator (character '&') is not displayed in a tool
* tip. To display a single '&' in the tool tip, the character '&'
* can be escaped by doubling it in the string.
* </p>
*
* @param string
* the new tool tip text (or null)
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*
* @since 3.2
*/
public void setToolTipText(String string) {
checkWidget();
Shell shell = parent._getShell();
setToolTipText(shell, string);
toolTipText = string;
}
void setToolTipText(Shell shell, String newString) {
shell.setToolTipText(buttonHandle, newString);
}
/**
* Sets the width of the receiver.
*
* @param width
* the new width
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been
* disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver</li>
* </ul>
*/
public void setWidth(int width) {
sendEvent(SWT.Resize);
}
}