tableitem.java

源码为Eclipse开源开发平台桌面开发工具SWT的源代码,

	parent.setScrollWidth (this, false);
	redraw (-1, true, true);
}

/**
 * Sets the font that the receiver will use to paint textual information
 * for the specified cell in this item to the font specified by the 
 * argument, or to the default font for that kind of control if the 
 * argument is null.
 *
 * @param index the column index
 * @param font the new font (or null)
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
 * 
 * @since 3.0
 */
public void setFont (int index, Font font) {
	checkWidget ();
	if (font != null && font.isDisposed ()) {
		SWT.error (SWT.ERROR_INVALID_ARGUMENT);
	}
	int count = Math.max (1, parent.getColumnCount ());
	if (0 > index || index > count - 1) return;
	int hFont = -1;
	if (font != null) {
		parent.customDraw = true;
		hFont = font.handle;
	}
	if (cellFont == null) {
		cellFont = new int [count];
		for (int i = 0; i < count; i++) {
			cellFont [i] = -1;
		}
	}
	if (cellFont [index] == hFont) return;
	cellFont [index] = hFont;
	if (index == 0) {
		/*
		* Bug in Windows.  Despite the fact that every item in the
		* table always has LPSTR_TEXTCALLBACK, Windows caches the
		* bounds for the selected items.  This means that 
		* when you change the string to be something else, Windows
		* correctly asks you for the new string but when the item
		* is selected, the selection draws using the bounds of the
		* previous item.  The fix is to reset LPSTR_TEXTCALLBACK
		* even though it has not changed, causing Windows to flush
		* cached bounds.
		*/
		if ((parent.style & SWT.VIRTUAL) == 0 && cached) {
			int itemIndex = parent.indexOf (this);
			if (itemIndex != -1) {
				int hwnd = parent.handle;
				LVITEM lvItem = new LVITEM ();
				lvItem.mask = OS.LVIF_TEXT;
				lvItem.iItem = itemIndex;
				lvItem.pszText = OS.LPSTR_TEXTCALLBACK;
				OS.SendMessage (hwnd, OS.LVM_SETITEM, 0, lvItem);
				cached = false;
			}
		}
		parent.setScrollWidth (this, false);
	}	
	redraw (index, true, true);
}
/**
 * Sets the receiver's foreground color to the color specified
 * by the argument, or to the default system color for the item
 * if the argument is null.
 *
 * @param color the new color (or null)
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
 * 
 * @since 2.0
 * 
 */
public void setForeground (Color color){
	checkWidget ();
	if (color != null && color.isDisposed ()) {
		SWT.error (SWT.ERROR_INVALID_ARGUMENT);
	}
	int pixel = -1;
	if (color != null) {
		parent.customDraw = true;
		pixel = color.handle;
	}
	if (foreground == pixel) return;
	foreground = pixel;
	redraw (-1, true, true);
}

/**
 * Sets the foreground color at the given column index in the receiver 
 * to the color specified by the argument, or to the default system color for the item
 * if the argument is null.
 *
 * @param index the column index
 * @param color the new color (or null)
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the argument has been disposed</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>
 * 
 * @since 3.0
 * 
 */
public void setForeground (int index, Color color){
	checkWidget ();
	if (color != null && color.isDisposed ()) {
		SWT.error (SWT.ERROR_INVALID_ARGUMENT);
	}
	int count = Math.max (1, parent.getColumnCount ());
	if (0 > index || index > count - 1) return;
	int pixel = -1;
	if (color != null) {
		parent.customDraw = true;
		pixel = color.handle;
	}
	if (cellForeground == null) {
		cellForeground = new int [count];
		for (int i = 0; i < count; i++) {
			cellForeground [i] = -1;
		}
	}
	if (cellForeground [index] == pixel) return;
	cellForeground [index] = pixel;
	redraw (index, true, true);
}

/**
 * Sets the grayed state of the checkbox for this item.  This state change 
 * only applies if the Table was created with the SWT.CHECK style.
 *
 * @param grayed the new grayed state of the checkbox; 
 *
 * @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 setGrayed (boolean grayed) {
	checkWidget();
	if ((parent.style & SWT.CHECK) == 0) return;
	if (this.grayed == grayed) return;
	this.grayed = grayed;
	redraw (-1, true, true);
}

/**
 * Sets the image for multiple columns in the Table. 
 * 
 * @param images the array of new images
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the array of images is null</li>
 *    <li>ERROR_INVALID_ARGUMENT - if one of the images has been disposed</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>
 */
public void setImage (Image [] images) {
	checkWidget();
	if (images == null) error (SWT.ERROR_NULL_ARGUMENT);
	for (int i=0; i<images.length; i++) {
		setImage (i, images [i]);
	}
}

/**
 * Sets the receiver's image at a column.
 *
 * @param index the column index
 * @param image the new image
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</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>
 */
public void setImage (int index, Image image) {
	checkWidget();
	if (image != null && image.isDisposed ()) {
		error(SWT.ERROR_INVALID_ARGUMENT);
	}
	if (index == 0) {
		if (image != null && image.type == SWT.ICON) {
			if (image.equals (this.image)) return;
		}
		super.setImage (image);
	}
	int count = Math.max (1, parent.getColumnCount ());
	if (0 > index || index > count - 1) return;
	if (images == null && index != 0) images = new Image [count];
	if (images != null) {
		if (image != null && image.type == SWT.ICON) {
			if (image.equals (images [index])) return;
		}
		images [index] = image;
	}
	
	/* Ensure that the image list is created */
	parent.imageIndex (image);
	
	if (index == 0) parent.setScrollWidth (this, false);
	redraw (index, false, true);
}

public void setImage (Image image) {
	checkWidget ();
	setImage (0, image);
}

/**
 * Sets the indent of the first column's image, expressed in terms of the image's width.
 *
 * @param indent the new indent
 *
 * </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>
 */
public void setImageIndent (int indent) {
	checkWidget();
	if (indent < 0) return;
	if (imageIndent == indent) return;
	imageIndent = indent;
	if ((parent.style & SWT.VIRTUAL) == 0) {
		int index = parent.indexOf (this);
		if (index != -1) {
			int hwnd = parent.handle;
			LVITEM lvItem = new LVITEM ();
			lvItem.mask = OS.LVIF_INDENT;
			lvItem.iItem = index;
			lvItem.iIndent = indent;
			OS.SendMessage (hwnd, OS.LVM_SETITEM, 0, lvItem);
		}
	}
	parent.setScrollWidth (this, false);
	redraw (-1, true, true);
}

/**
 * Sets the text for multiple columns in the table. 
 * 
 * @param strings the array of new strings
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the text 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>
 */
public void setText (String [] strings) {
	checkWidget();
	if (strings == null) error (SWT.ERROR_NULL_ARGUMENT);
	for (int i=0; i<strings.length; i++) {
		String string = strings [i];
		if (string != null) setText (i, string);
	}
}

/**
 * Sets the receiver's text at a column
 *
 * @param index the column index
 * @param string the new text
 *
 * @exception IllegalArgumentException <ul>
 *    <li>ERROR_NULL_ARGUMENT - if the text 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>
 */
public void setText (int index, String string) {
	checkWidget();
	if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
	if (index == 0) {
		if (string.equals (text)) return;
		super.setText (string);
	}
	int count = Math.max (1, parent.getColumnCount ());
	if (0 > index || index > count - 1) return;
	if (strings == null && index != 0) strings = new String [count];
	if (strings != null) {
		if (string.equals (strings [index])) return;
		strings [index] = string;
	}
	if (index == 0) {
		/*
		* Bug in Windows.  Despite the fact that every item in the
		* table always has LPSTR_TEXTCALLBACK, Windows caches the
		* bounds for the selected items.  This means that 
		* when you change the string to be something else, Windows
		* correctly asks you for the new string but when the item
		* is selected, the selection draws using the bounds of the
		* previous item.  The fix is to reset LPSTR_TEXTCALLBACK
		* even though it has not changed, causing Windows to flush
		* cached bounds.
		*/
		if ((parent.style & SWT.VIRTUAL) == 0 && cached) {
			int itemIndex = parent.indexOf (this);
			if (itemIndex != -1) {
				int hwnd = parent.handle;
				LVITEM lvItem = new LVITEM ();
				lvItem.mask = OS.LVIF_TEXT;
				lvItem.iItem = itemIndex;
				lvItem.pszText = OS.LPSTR_TEXTCALLBACK;
				OS.SendMessage (hwnd, OS.LVM_SETITEM, 0, lvItem);
				cached = false;
			}
		}
		parent.setScrollWidth (this, false);
	}
	redraw (index, true, false);
}

public void setText (String string) {
	checkWidget();
	setText (0, string);
}

}