/*******************************************************************************
* Copyright (c) 2000, 2012 IBM Corporation 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
*******************************************************************************/
package org.eclipse.swt.widgets;
import org.eclipse.swt.internal.win32.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
/**
* Instances of this class represent a non-selectable
* user interface object that displays a string or image.
* When SEPARATOR is specified, displays a single
* vertical or horizontal line.
* <p>
* Shadow styles are hints and may not be honored
* by the platform. To create a separator label
* with the default shadow style for the platform,
* do not specify a shadow style.
* </p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>SEPARATOR, HORIZONTAL, VERTICAL</dd>
* <dd>SHADOW_IN, SHADOW_OUT, SHADOW_NONE</dd>
* <dd>CENTER, LEFT, RIGHT, WRAP</dd>
* <dt><b>Events:</b></dt>
* <dd>(none)</dd>
* </dl>
* <p>
* Note: Only one of SHADOW_IN, SHADOW_OUT and SHADOW_NONE may be specified.
* SHADOW_NONE is a HINT. Only one of HORIZONTAL and VERTICAL may be specified.
* Only one of CENTER, LEFT and RIGHT 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/#label">Label snippets</a>
* @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
* @noextend This class is not intended to be subclassed by clients.
*/
public class Label extends Control {
String text = "";
Image image;
static final int MARGIN = 4;
static /*final*/ boolean IMAGE_AND_TEXT = false;
static final long /*int*/ LabelProc;
static final TCHAR LabelClass = new TCHAR (0, "STATIC", true);
static {
WNDCLASS lpWndClass = new WNDCLASS ();
OS.GetClassInfo (0, LabelClass, lpWndClass);
LabelProc = lpWndClass.lpfnWndProc;
}
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <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#SEPARATOR
* @see SWT#HORIZONTAL
* @see SWT#VERTICAL
* @see SWT#SHADOW_IN
* @see SWT#SHADOW_OUT
* @see SWT#SHADOW_NONE
* @see SWT#CENTER
* @see SWT#LEFT
* @see SWT#RIGHT
* @see SWT#WRAP
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public Label (Composite parent, int style) {
super (parent, checkStyle (style));
}
long /*int*/ callWindowProc (long /*int*/ hwnd, int msg, long /*int*/ wParam, long /*int*/ lParam) {
if (handle == 0) return 0;
/*
* Feature in Windows 7. When the user double clicks
* on the label, the text of the label is copied to the
* clipboard. This is unwanted. The fix is to avoid
* calling the label window proc.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(6, 1)) {
switch (msg) {
case OS.WM_LBUTTONDBLCLK: return OS.DefWindowProc (hwnd, msg, wParam, lParam);
}
}
return OS.CallWindowProc (LabelProc, hwnd, msg, wParam, lParam);
}
static int checkStyle (int style) {
style |= SWT.NO_FOCUS;
if ((style & SWT.SEPARATOR) != 0) {
style = checkBits (style, SWT.VERTICAL, SWT.HORIZONTAL, 0, 0, 0, 0);
return checkBits (style, SWT.SHADOW_OUT, SWT.SHADOW_IN, SWT.SHADOW_NONE, 0, 0, 0);
}
return checkBits (style, SWT.LEFT, SWT.CENTER, SWT.RIGHT, 0, 0, 0);
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget ();
int width = 0, height = 0, border = getBorderWidth ();
if ((style & SWT.SEPARATOR) != 0) {
int lineWidth = OS.GetSystemMetrics (OS.SM_CXBORDER);
if ((style & SWT.HORIZONTAL) != 0) {
width = DEFAULT_WIDTH; height = lineWidth * 2;
} else {
width = lineWidth * 2; height = DEFAULT_HEIGHT;
}
if (wHint != SWT.DEFAULT) width = wHint;
if (hHint != SWT.DEFAULT) height = hHint;
width += border * 2; height += border * 2;
return new Point (width, height);
}
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
boolean drawText = true;
boolean drawImage = (bits & OS.SS_OWNERDRAW) == OS.SS_OWNERDRAW;
if (drawImage) {
if (image != null) {
Rectangle rect = image.getBounds();
width += rect.width;
height += rect.height;
if (IMAGE_AND_TEXT) {
if (text.length () != 0) width += MARGIN;
} else {
drawText = false;
}
}
}
if (drawText) {
long /*int*/ hDC = OS.GetDC (handle);
long /*int*/ newFont = OS.SendMessage (handle, OS.WM_GETFONT, 0, 0);
long /*int*/ oldFont = OS.SelectObject (hDC, newFont);
int length = OS.GetWindowTextLength (handle);
if (length == 0) {
TEXTMETRIC tm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW () : new TEXTMETRICA ();
OS.GetTextMetrics (hDC, tm);
height = Math.max (height, tm.tmHeight);
} else {
RECT rect = new RECT ();
int flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_EXPANDTABS;
if ((style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT) {
flags |= OS.DT_WORDBREAK;
rect.right = Math.max (0, wHint - width);
}
TCHAR buffer = new TCHAR (getCodePage (), length + 1);
OS.GetWindowText (handle, buffer, length + 1);
OS.DrawText (hDC, buffer, length, rect, flags);
width += rect.right - rect.left;
height = Math.max (height, rect.bottom - rect.top);
}
if (newFont != 0) OS.SelectObject (hDC, oldFont);
OS.ReleaseDC (handle, hDC);
}
if (wHint != SWT.DEFAULT) width = wHint;
if (hHint != SWT.DEFAULT) height = hHint;
width += border * 2;
height += border * 2;
/*
* Feature in WinCE PPC. Text labels have a trim
* of one pixel wide on the right and left side.
* The fix is to increase the width to include
* this trim.
*/
if (OS.IsWinCE && !drawImage) width += 2;
return new Point (width, height);
}
void createHandle () {
super.createHandle ();
state |= THEME_BACKGROUND;
}
/**
* 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>
* unless the receiver is a <code>SEPARATOR</code> label, in
* which case, <code>NONE</code> is returned.
*
* @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.SEPARATOR) != 0) return 0;
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;
}
/**
* Returns the receiver's image if it has one, or null
* if it does not.
*
* @return the receiver's image
*
* @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 Image getImage () {
checkWidget ();
return image;
}
String getNameText () {
return getText ();
}
/**
* Returns the receiver's text, which will be an empty
* string if it has never been set or if the receiver is
* a <code>SEPARATOR</code> label.
*
* @return the receiver's 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>
*/
public String getText () {
checkWidget ();
if ((style & SWT.SEPARATOR) != 0) return "";
return text;
}
boolean mnemonicHit (char key) {
Control control = this;
while (control.parent != null) {
Control [] children = control.parent._getChildren ();
int index = 0;
while (index < children.length) {
if (children [index] == control) break;
index++;
}
index++;
if (index < children.length) {
if (children [index].setFocus ()) return true;
}
control = control.parent;
}
return false;
}
boolean mnemonicMatch (char key) {
char mnemonic = findMnemonic (getText ());
if (mnemonic == '\0') return false;
return Character.toUpperCase (key) == Character.toUpperCase (mnemonic);
}
void releaseWidget () {
super.releaseWidget ();
text = null;
image = null;
}
/**
* 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>. If the receiver is a <code>SEPARATOR</code>
* label, the argument is ignored and the alignment is not changed.
*
* @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) {
checkWidget ();
if ((style & SWT.SEPARATOR) != 0) return;
if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return;
style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER);
style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER);
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
if ((bits & OS.SS_OWNERDRAW) != OS.SS_OWNERDRAW) {
bits &= ~(OS.SS_LEFTNOWORDWRAP | OS.SS_CENTER | OS.SS_RIGHT);
if ((style & SWT.LEFT) != 0) {
if ((style & SWT.WRAP) != 0) {
bits |= OS.SS_LEFT;
} else {
bits |= OS.SS_LEFTNOWORDWRAP;
}
}
if ((style & SWT.CENTER) != 0) bits |= OS.SS_CENTER;
if ((style & SWT.RIGHT) != 0) bits |= OS.SS_RIGHT;
OS.SetWindowLong (handle, OS.GWL_STYLE, bits);
}
OS.InvalidateRect (handle, null, true);
}
/**
* Sets the receiver's image to the argument, which may be
* null indicating that no image should be displayed.
*
* @param image the image to display on the receiver (may be null)
*
* @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 (Image image) {
checkWidget ();
if ((style & SWT.SEPARATOR) != 0) return;
if (image != null && image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
this.image = image;
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
if ((bits & OS.SS_OWNERDRAW) != OS.SS_OWNERDRAW) {
bits &= ~(OS.SS_LEFTNOWORDWRAP | OS.SS_CENTER | OS.SS_RIGHT);
bits |= OS.SS_OWNERDRAW;
OS.SetWindowLong (handle, OS.GWL_STYLE, bits);
}
OS.InvalidateRect (handle, null, true);
}
/**
* Sets the receiver's text.
* <p>
* This method sets the widget label. The label may include
* the mnemonic character and line delimiters.
* </p>
* <p>
* Mnemonics are indicated by an '&' that causes the next
* character to be the mnemonic. When the user presses a
* key sequence that matches the mnemonic, focus is assigned
* to the control that follows the label. On most platforms,
* the mnemonic appears underlined but may be emphasised in a
* platform specific manner. The mnemonic indicator character
* '&' can be escaped by doubling it in the string, causing
* a single '&' to be displayed.
* </p>
*
* @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 (String string) {
checkWidget ();
if (string == null) error (SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.SEPARATOR) != 0) return;
/*
* Feature in Windows. For some reason, SetWindowText() for
* static controls redraws the control, even when the text has
* has not changed. The fix is to check for this case and do
* nothing.
*/
if (string.equals (text)) return;
text = string;
if (image == null || !IMAGE_AND_TEXT) {
int oldBits = OS.GetWindowLong (handle, OS.GWL_STYLE), newBits = oldBits;
newBits &= ~OS.SS_OWNERDRAW;
if ((style & SWT.LEFT) != 0) {
if ((style & SWT.WRAP) != 0) {
newBits |= OS.SS_LEFT;
} else {
newBits |= OS.SS_LEFTNOWORDWRAP;
}
}
if ((style & SWT.CENTER) != 0) newBits |= OS.SS_CENTER;
if ((style & SWT.RIGHT) != 0) newBits |= OS.SS_RIGHT;
if (oldBits != newBits) OS.SetWindowLong (handle, OS.GWL_STYLE, newBits);
}
string = Display.withCrLf (string);
TCHAR buffer = new TCHAR (getCodePage (), string, true);
OS.SetWindowText (handle, buffer);
/*
* Bug in Windows. For some reason, the HBRUSH that
* is returned from WM_CTRLCOLOR is misaligned when
* the label uses it to draw. If the brush is a solid
* color, this does not matter. However, if the brush
* contains an image, the image is misaligned. The
* fix is to draw the background in WM_ERASEBKGND.
*/
if (OS.COMCTL32_MAJOR < 6) {
if (findImageControl () != null) OS.InvalidateRect (handle, null, true);
}
}
int widgetExtStyle () {
int bits = super.widgetExtStyle () & ~OS.WS_EX_CLIENTEDGE;
if ((style & SWT.BORDER) != 0) return bits | OS.WS_EX_STATICEDGE;
return bits;
}
int widgetStyle () {
int bits = super.widgetStyle () | OS.SS_NOTIFY;
if ((style & SWT.SEPARATOR) != 0) return bits | OS.SS_OWNERDRAW;
if (OS.WIN32_VERSION >= OS.VERSION (5, 0)) {
if ((style & SWT.WRAP) != 0) bits |= OS.SS_EDITCONTROL;
}
if ((style & SWT.CENTER) != 0) return bits | OS.SS_CENTER;
if ((style & SWT.RIGHT) != 0) return bits | OS.SS_RIGHT;
if ((style & SWT.WRAP) != 0) return bits | OS.SS_LEFT;
return bits | OS.SS_LEFTNOWORDWRAP;
}
TCHAR windowClass () {
return LabelClass;
}
long /*int*/ windowProc () {
return LabelProc;
}
LRESULT WM_ERASEBKGND (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_ERASEBKGND (wParam, lParam);
if (result != null) return result;
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
if ((bits & OS.SS_OWNERDRAW) == OS.SS_OWNERDRAW) {
return LRESULT.ONE;
}
/*
* Bug in Windows. For some reason, the HBRUSH that
* is returned from WM_CTRLCOLOR is misaligned when
* the label uses it to draw. If the brush is a solid
* color, this does not matter. However, if the brush
* contains an image, the image is misaligned. The
* fix is to draw the background in WM_ERASEBKGND.
*/
if (OS.COMCTL32_MAJOR < 6) {
if (findImageControl () != null) {
drawBackground (wParam);
return LRESULT.ONE;
}
}
return result;
}
LRESULT WM_SIZE (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_SIZE (wParam, lParam);
if (isDisposed ()) return result;
if ((style & SWT.SEPARATOR) != 0) {
OS.InvalidateRect (handle, null, true);
return result;
}
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
if ((bits & OS.SS_OWNERDRAW) == OS.SS_OWNERDRAW) {
OS.InvalidateRect (handle, null, true);
return result;
}
/*
* Bug in Windows. For some reason, a label with
* style SS_LEFT, SS_CENTER or SS_RIGHT does not
* redraw the text in the new position when resized.
* Note that SS_LEFTNOWORDWRAP does not have the
* problem. The fix is to force the redraw.
*/
if ((bits & OS.SS_LEFTNOWORDWRAP) != OS.SS_LEFTNOWORDWRAP) {
OS.InvalidateRect (handle, null, true);
return result;
}
return result;
}
LRESULT WM_UPDATEUISTATE (long /*int*/ wParam, long /*int*/ lParam) {
LRESULT result = super.WM_UPDATEUISTATE (wParam, lParam);
if (result != null) return result;
/*
* Feature in Windows. When WM_UPDATEUISTATE is sent to
* a static control, it sends WM_CTLCOLORSTATIC to get the
* foreground and background. If any drawing happens in
* WM_CTLCOLORSTATIC, it overwrites the contents of the control.
* The fix is draw the static without drawing the background
* and avoid the static window proc.
*/
boolean redraw = findImageControl () != null;
if (!redraw) {
if ((state & THEME_BACKGROUND) != 0) {
if (OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ()) {
redraw = findThemeControl () != null;
}
}
}
if (redraw) {
OS.InvalidateRect (handle, null, false);
long /*int*/ code = OS.DefWindowProc (handle, OS.WM_UPDATEUISTATE, wParam, lParam);
return new LRESULT (code);
}
return result;
}
LRESULT wmColorChild (long /*int*/ wParam, long /*int*/ lParam) {
/*
* Bug in Windows. For some reason, the HBRUSH that
* is returned from WM_CTRLCOLOR is misaligned when
* the label uses it to draw. If the brush is a solid
* color, this does not matter. However, if the brush
* contains an image, the image is misaligned. The
* fix is to draw the background in WM_ERASEBKGND.
*/
LRESULT result = super.wmColorChild (wParam, lParam);
if (OS.COMCTL32_MAJOR < 6) {
int bits = OS.GetWindowLong (handle, OS.GWL_STYLE);
if ((bits & OS.SS_OWNERDRAW) != OS.SS_OWNERDRAW) {
if (findImageControl () != null) {
OS.SetBkMode (wParam, OS.TRANSPARENT);
return new LRESULT (OS.GetStockObject (OS.NULL_BRUSH));
}
}
}
return result;
}
LRESULT WM_PAINT (long /*int*/ wParam, long /*int*/ lParam) {
if ((state & DISPOSE_SENT) != 0) return LRESULT.ZERO;
if (OS.IsWinCE) {
boolean drawImage = image != null;
boolean drawSeparator = (style & SWT.SEPARATOR) != 0 && (style & SWT.SHADOW_NONE) == 0;
if (drawImage || drawSeparator) {
LRESULT result = null;
PAINTSTRUCT ps = new PAINTSTRUCT ();
GCData data = new GCData ();
data.ps = ps;
data.hwnd = handle;
GC gc = new_GC (data);
if (gc != null) {
drawBackground (gc.handle);
RECT clientRect = new RECT();
OS.GetClientRect (handle, clientRect);
if (drawSeparator) {
RECT rect = new RECT ();
int lineWidth = OS.GetSystemMetrics (OS.SM_CXBORDER);
int flags = (style & SWT.SHADOW_IN) != 0 ? OS.EDGE_SUNKEN : OS.EDGE_ETCHED;
if ((style & SWT.HORIZONTAL) != 0) {
int bottom = clientRect.top + Math.max (lineWidth * 2, (clientRect.bottom - clientRect.top) / 2);
OS.SetRect (rect, clientRect.left, clientRect.top, clientRect.right, bottom);
OS.DrawEdge (gc.handle, rect, flags, OS.BF_BOTTOM);
} else {
int right = clientRect.left + Math.max (lineWidth * 2, (clientRect.right - clientRect.left) / 2);
OS.SetRect (rect, clientRect.left, clientRect.top, right, clientRect.bottom);
OS.DrawEdge (gc.handle, rect, flags, OS.BF_RIGHT);
}
result = LRESULT.ONE;
}
if (drawImage) {
Rectangle imageBounds = image.getBounds ();
int x = 0;
if ((style & SWT.CENTER) != 0) {
x = Math.max (0, (clientRect.right - imageBounds.width) / 2);
} else {
if ((style & SWT.RIGHT) != 0) {
x = Math.max (0, (clientRect.right - imageBounds.width));
}
}
gc.drawImage (image, x, Math.max (0, (clientRect.bottom - imageBounds.height) / 2));
result = LRESULT.ONE;
}
int width = ps.right - ps.left;
int height = ps.bottom - ps.top;
if (width != 0 && height != 0) {
Event event = new Event ();
event.gc = gc;
event.x = ps.left;
event.y = ps.top;
event.width = width;
event.height = height;
sendEvent (SWT.Paint, event);
// widget could be disposed at this point
event.gc = null;
}
gc.dispose ();
}
return result;
}
}
return super.WM_PAINT(wParam, lParam);
}
LRESULT wmDrawChild (long /*int*/ wParam, long /*int*/ lParam) {
DRAWITEMSTRUCT struct = new DRAWITEMSTRUCT ();
OS.MoveMemory (struct, lParam, DRAWITEMSTRUCT.sizeof);
drawBackground (struct.hDC);
if ((style & SWT.SEPARATOR) != 0) {
if ((style & SWT.SHADOW_NONE) != 0) return null;
RECT rect = new RECT ();
int lineWidth = OS.GetSystemMetrics (OS.SM_CXBORDER);
int flags = (style & SWT.SHADOW_IN) != 0 ? OS.EDGE_SUNKEN : OS.EDGE_ETCHED;
if ((style & SWT.HORIZONTAL) != 0) {
int bottom = struct.top + Math.max (lineWidth * 2, (struct.bottom - struct.top) / 2);
OS.SetRect (rect, struct.left, struct.top, struct.right, bottom);
OS.DrawEdge (struct.hDC, rect, flags, OS.BF_BOTTOM);
} else {
int right = struct.left + Math.max (lineWidth * 2, (struct.right - struct.left) / 2);
OS.SetRect (rect, struct.left, struct.top, right, struct.bottom);
OS.DrawEdge (struct.hDC, rect, flags, OS.BF_RIGHT);
}
} else {
int width = struct.right - struct.left;
int height = struct.bottom - struct.top;
if (width != 0 && height != 0) {
boolean drawImage = image != null;
boolean drawText = IMAGE_AND_TEXT && text.length () != 0;
int margin = drawText && drawImage ? MARGIN : 0;
int imageWidth = 0, imageHeight = 0;
if (drawImage) {
Rectangle rect = image.getBounds ();
imageWidth = rect.width;
imageHeight = rect.height;
}
RECT rect = null;
TCHAR buffer = null;
int textWidth = 0, textHeight = 0, flags = 0;
if (drawText) {
rect = new RECT ();
flags = OS.DT_CALCRECT | OS.DT_EDITCONTROL | OS.DT_EXPANDTABS;
if ((style & SWT.LEFT) != 0) flags |= OS.DT_LEFT;
if ((style & SWT.CENTER) != 0) flags |= OS.DT_CENTER;
if ((style & SWT.RIGHT) != 0) flags |= OS.DT_RIGHT;
if ((style & SWT.WRAP) != 0) {
flags |= OS.DT_WORDBREAK;
rect.right = Math.max (0, width - imageWidth - margin);
}
buffer = new TCHAR (getCodePage (), text, true);
OS.DrawText (struct.hDC, buffer, -1, rect, flags);
textWidth = rect.right - rect.left;
textHeight = rect.bottom - rect.top;
}
int x = 0;
if ((style & SWT.CENTER) != 0) {
x = Math.max (0, (width - imageWidth - textWidth - margin) / 2);
} else {
if ((style & SWT.RIGHT) != 0) {
x = width - imageWidth - textWidth - margin;
}
}
if (drawImage) {
GCData data = new GCData();
data.device = display;
GC gc = GC.win32_new (struct.hDC, data);
Image image = getEnabled () ? this.image : new Image (display, this.image, SWT.IMAGE_DISABLE);
gc.drawImage (image, x, Math.max (0, (height - imageHeight) / 2));
if (image != this.image) image.dispose ();
gc.dispose ();
x += imageWidth + margin;
}
if (drawText) {
flags &= ~OS.DT_CALCRECT;
rect.left = x;
rect.right += rect.left;
rect.top = Math.max (0, (height - textHeight) / 2);
rect.bottom += rect.top;
OS.DrawText (struct.hDC, buffer, -1, rect, flags);
}
}
}
return null;
}
}