org.eclipse.swt.widgets.TreeColumn Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2002, 2019 Innoopract Informationssysteme GmbH 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:
* Innoopract Informationssysteme GmbH - initial API and implementation
* EclipseSource - ongoing development
******************************************************************************/
package org.eclipse.swt.widgets;
import static org.eclipse.swt.internal.widgets.MarkupUtil.checkMarkupPrecondition;
import static org.eclipse.swt.internal.widgets.MarkupUtil.isToolTipMarkupEnabledFor;
import static org.eclipse.swt.internal.widgets.MarkupUtil.MarkupTarget.TOOLTIP;
import static org.eclipse.swt.internal.widgets.MarkupValidator.isValidationDisabledFor;
import org.eclipse.rap.rwt.RWT;
import org.eclipse.rap.rwt.internal.lifecycle.WidgetLCA;
import org.eclipse.rap.rwt.internal.textsize.TextSizeUtil;
import org.eclipse.rap.rwt.theme.BoxDimensions;
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.Font;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.internal.SerializableCompatibility;
import org.eclipse.swt.internal.widgets.IColumnAdapter;
import org.eclipse.swt.internal.widgets.MarkupValidator;
import org.eclipse.swt.internal.widgets.treecolumnkit.TreeColumnLCA;
/**
* Instances of this class represent a column in a tree widget.
*
*
* - Styles:
* - LEFT, RIGHT, CENTER
* - Events:
* - Move, Resize, Selection
*
*
*
* Note: Only one of the styles LEFT, RIGHT and CENTER may be specified.
*
*
* IMPORTANT: This class is not intended to be subclassed.
*
*
* @since 1.0
*/
public class TreeColumn extends Item {
private static final int SORT_INDICATOR_WIDTH = 10;
private static final int MARGIN_IMAGE = 3;
private Tree parent;
private final IColumnAdapter columnAdapter;
private int width;
private String toolTipText;
private boolean resizable;
private boolean moveable;
private int sort;
int itemImageCount;
private boolean packed;
/**
* Constructs a new instance of this class given its parent (which must be a
* Tree) and a style value describing its behavior and
* appearance. The item is added to the end of the items maintained by its
* parent.
*
* The style value is either one of the style constants defined in class
* SWT which is applicable to instances of this class, or must be
* built by bitwise OR'ing together (that is, using the
* int "|" operator) two or more of those SWT style
* constants. The class description lists the style constants that are
* applicable to the class. Style bits are also inherited from superclasses.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if the parent is null
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed
* subclass
*
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#CENTER
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public TreeColumn( Tree parent, int style ) {
this( parent, style, checkNull( parent ).columnHolder.size() );
}
/**
* Constructs a new instance of this class given its parent (which must be a
* Tree), a style value describing its behavior and appearance,
* and the index at which to place it in the items maintained by its parent.
*
* The style value is either one of the style constants defined in class
* SWT which is applicable to instances of this class, or must be
* built by bitwise OR'ing together (that is, using the
* int "|" operator) two or more of those SWT style
* constants. The class description lists the style constants that are
* applicable to the class. Style bits are also inherited from superclasses.
*
*
* @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
* - ERROR_NULL_ARGUMENT - if the parent is null
* - ERROR_INVALID_RANGE - if the index is not between 0 and
* the number of elements in the parent (inclusive)
*
* @exception SWTException
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the parent
* - ERROR_INVALID_SUBCLASS - if this class is not an allowed
* subclass
*
* @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 ) );
if( !( 0 <= index && index <= parent.columnHolder.size() ) ) {
error( SWT.ERROR_INVALID_RANGE );
}
this.parent = parent;
sort = SWT.NONE;
resizable = true;
columnAdapter = new ColumnAdapter();
parent.createColumn( this, 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 ControlListener interface.
*
* @param listener the listener which should be notified
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
* @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.Move, typedListener );
addListener( SWT.Resize, typedListener );
}
/**
* 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
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
* @see ControlListener
* @see #addControlListener
*/
public void removeControlListener( ControlListener listener ) {
checkWidget();
if( listener == null ) {
error( SWT.ERROR_NULL_ARGUMENT );
}
removeListener( SWT.Move, listener );
removeListener( SWT.Resize, listener );
}
/**
* 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 SelectionListener interface.
*
* widgetSelected is called when the column header is selected.
* widgetDefaultSelected is not called.
*
*
* @param listener the listener which should be notified when the control is
* selected by the user
* @exception IllegalArgumentException
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener( SelectionListener listener ) {
checkWidget();
if( listener == null ) {
SWT.error( SWT.ERROR_NULL_ARGUMENT );
}
TypedListener typedListener = new TypedListener( listener );
addListener( SWT.Selection, typedListener );
addListener( SWT.DefaultSelection, typedListener );
}
/**
* 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
* - ERROR_NULL_ARGUMENT - if the listener is null
*
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener( SelectionListener listener ) {
checkWidget();
if( listener == null ) {
SWT.error( SWT.ERROR_NULL_ARGUMENT );
}
removeListener( SWT.Selection, listener );
removeListener( SWT.DefaultSelection, listener );
}
static Tree checkNull( Tree tree ) {
if( tree == null ) {
SWT.error( SWT.ERROR_NULL_ARGUMENT );
}
return tree;
}
static int checkStyle( int style ) {
return checkBits( style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0 );
}
/**
* Returns a value which describes the position of the text or image in the
* receiver. The value will be one of LEFT, RIGHT or
* CENTER.
*
* @return the alignment
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public int getAlignment() {
checkWidget();
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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
* @see Tree#getColumnOrder()
* @see Tree#setColumnOrder(int[])
* @see TreeColumn#setMoveable(boolean)
* @see SWT#Move
*/
public boolean getMoveable() {
checkWidget();
return moveable;
}
/**
* Returns the receiver's parent, which must be a Tree.
*
* @return the receiver's parent
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public Tree getParent() {
checkWidget();
return parent;
}
int getPreferredWidth() {
int result = 0;
Font font = parent.getHeaderFont();
if( text.length() > 0 ) {
if( text.indexOf( '\n' ) != -1 ) {
result = TextSizeUtil.textExtent( font, text, 0 ).x;
} else {
result = TextSizeUtil.stringExtent( font, text ).x;
}
}
if( image != null ) {
result += image.getBounds().width;
if( text.length() > 0 ) {
result += MARGIN_IMAGE;
}
}
if( sort != SWT.NONE ) {
result += SORT_INDICATOR_WIDTH;
if( text.length() > 0 || image != null ) {
result += MARGIN_IMAGE;
}
}
BoxDimensions headerPadding = parent.getThemeAdapter().getHeaderPadding( parent );
// Add 1px for the right column border
return result + headerPadding.left + headerPadding.right + 1;
}
/**
* 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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public boolean getResizable() {
checkWidget();
return resizable;
}
/**
* Returns the receiver's tool tip text, or null if it has not been set.
*
* @return the receiver's tool tip text
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public String getToolTipText() {
checkWidget();
return toolTipText;
}
/**
* Gets the width of the receiver.
*
* @return the width
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public int getWidth() {
checkWidget();
return width;
}
/**
* 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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public void pack() {
checkWidget();
int newWidth = getPreferredWidth();
int contentWidth = parent.getMaxContentWidth( this );
newWidth = Math.max( newWidth, contentWidth );
// Mimic Windows behaviour that has a minimal width
if( newWidth < 12 ) {
newWidth = 12;
}
setWidth( newWidth );
packed = true;
}
/**
* Controls how text and images will be displayed in the receiver. The
* argument should be one of LEFT, RIGHT or
* CENTER.
*
* @param alignment the new alignment
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public void setAlignment( int alignment ) {
checkWidget();
if( ( alignment & ( SWT.LEFT | SWT.RIGHT | SWT.CENTER ) ) == 0 ) {
return;
}
int newAlignment = checkBits( alignment, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0 );
if( ( style & newAlignment ) != 0 ) {
return; /* same value */
}
style &= ~( SWT.LEFT | SWT.CENTER | SWT.RIGHT );
style |= newAlignment;
// if (getOrderIndex () == 0) return; /* no update needed since first
// ordered column appears left-aligned */
}
/**
* 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
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
* @see Tree#setColumnOrder(int[])
* @see Tree#getColumnOrder()
* @see TreeColumn#getMoveable()
* @see SWT#Move
*/
public void setMoveable( boolean moveable ) {
checkWidget();
this.moveable = moveable;
}
/**
* Sets the resizable attribute. A column that is not resizable cannot be
* dragged by the user but may be resized by the programmer.
*
* @param value the resize attribute
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public void setResizable( boolean value ) {
checkWidget();
resizable = value;
}
void setSortDirection( int value ) {
if( value != sort ) {
sort = value;
}
}
@Override
public void setText( String value ) {
checkWidget();
if( value == null ) {
error( SWT.ERROR_NULL_ARGUMENT );
}
if( !value.equals( text ) ) {
super.setText( value );
parent.layoutCache.invalidateHeaderHeight();
}
}
/**
* Sets the receiver's tool tip text to the argument, which may be null
* indicating that no tool tip text should be shown.
*
* @param toolTipText the new tool tip text (or null)
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public void setToolTipText( String toolTipText ) {
checkWidget();
if( toolTipText != null
&& isToolTipMarkupEnabledFor( this )
&& !isValidationDisabledFor( this ) )
{
MarkupValidator.getInstance().validate( toolTipText );
}
this.toolTipText = toolTipText;
}
/**
* Sets the width of the receiver.
*
* @param value the new width
* @exception SWTException
* - ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* - ERROR_THREAD_INVALID_ACCESS - if not called from the
* thread that created the receiver
*
*/
public void setWidth( int value ) {
checkWidget();
if( value >= 0 && width != value ) {
width = value;
parent.updateScrollBars();
notifyListeners( SWT.Resize, new Event() );
processNextColumnsMoveEvent();
packed = false;
}
}
@Override
@SuppressWarnings("unchecked")
public T getAdapter( Class adapter ) {
if( adapter == IColumnAdapter.class ) {
return ( T )columnAdapter;
}
if( adapter == WidgetLCA.class ) {
return ( T )TreeColumnLCA.INSTANCE;
}
return super.getAdapter( adapter );
}
@Override
public void setImage( Image image ) {
super.setImage( image );
parent.layoutCache.invalidateHeaderHeight();
}
@Override
public void setData( String key, Object value ) {
if( RWT.CUSTOM_VARIANT.equals( key ) ) {
parent.layoutCache.invalidateAll();
}
if( !RWT.TOOLTIP_MARKUP_ENABLED.equals( key ) || !isToolTipMarkupEnabledFor( this ) ) {
checkMarkupPrecondition( key, TOOLTIP, () -> toolTipText == null );
super.setData( key, value );
}
}
@Override
void releaseParent() {
super.releaseParent();
parent.destroyColumn( this );
}
//////////////////
// Helping methods
private void processNextColumnsMoveEvent() {
int[] columnsOrder = parent.getColumnOrder();
boolean found = false;
for( int i = 0; i < columnsOrder.length; i++ ) {
TreeColumn column = parent.getColumn( columnsOrder[ i ] );
if( column == this ) {
found = true;
} else if( found ) {
column.notifyListeners( SWT.Move, new Event() );
}
}
}
//////////////
// Left offset
final int getLeft() {
int result = 0;
TreeColumn[] columns = parent.getColumns();
int[] columnOrder = parent.getColumnOrder();
int orderedIndex = -1;
for( int i = 0; orderedIndex == -1 && i < columnOrder.length; i++ ) {
if( columnOrder[ i ] == parent.indexOf( this ) ) {
orderedIndex = i;
}
}
for( int i = 0; i < orderedIndex; i++ ) {
result += columns[ columnOrder[ i ] ].getWidth();
}
return result;
}
////////////////
// Inner classes
private final class ColumnAdapter implements IColumnAdapter, SerializableCompatibility {
@Override
public boolean isPacked() {
return packed;
}
@Override
public void clearPacked() {
packed = false;
}
}
}
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