LRESULT WM_GETDLGCODE(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_GETDLGCODE(wParam, lParam);
if (result != null) return result;
int index, count;
int /*long*/ code = 0;
if (OS.COMCTL32_MAJOR >= 6) {
LITEM item = new LITEM();
item.mask = OS.LIF_ITEMINDEX | OS.LIF_STATE;
item.stateMask = OS.LIS_FOCUSED;
index = 0;
while (OS.SendMessage(handle, OS.LM_GETITEM, 0, item) != 0) {
if ((item.state & OS.LIS_FOCUSED) != 0) {
index = item.iLink;
}
item.iLink++;
}
count = item.iLink;
code = callWindowProc(handle, OS.WM_GETDLGCODE, wParam, lParam);
} else {
index = focusIndex;
count = offsets.length;
}
if (count == 0) {
return new LRESULT(code | OS.DLGC_STATIC);
}
boolean next = OS.GetKeyState(OS.VK_SHIFT) >= 0;
if (next && index < count - 1) {
return new LRESULT(code | OS.DLGC_WANTTAB);
}
if (!next && index > 0) {
return new LRESULT(code | OS.DLGC_WANTTAB);
}
return result;
}
LRESULT WM_MOUSEMOVE(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_MOUSEMOVE(wParam, lParam);
if (OS.COMCTL32_MAJOR < 6) {
int x = OS.GET_X_LPARAM(lParam);
int y = OS.GET_Y_LPARAM(lParam);
if (OS.GetKeyState(OS.VK_LBUTTON) < 0) {
int oldSelection = selection.y;
selection.y = layout.getOffset(x, y, null);
if (selection.y != oldSelection) {
int newSelection = selection.y;
if (oldSelection > newSelection) {
int temp = oldSelection;
oldSelection = newSelection;
newSelection = temp;
}
Rectangle rect = layout.getBounds(oldSelection, newSelection);
redraw(rect.x, rect.y, rect.width, rect.height, false);
}
} else {
for (int j = 0; j < offsets.length; j++) {
Rectangle[] rects = getRectangles(j);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
if (rect.contains(x, y)) {
setCursor(display.getSystemCursor(SWT.CURSOR_HAND));
return result;
}
}
}
setCursor(null);
}
}
return result;
}
void drawWidget(GC gc, RECT rect) {
drawBackground(gc.handle, rect);
int selStart = selection.x;
int selEnd = selection.y;
if (selStart > selEnd) {
selStart = selection.y;
selEnd = selection.x;
}
// temporary code to disable text selection
selStart = selEnd = -1;
if (!OS.IsWindowEnabled(handle)) gc.setForeground(disabledColor);
layout.draw(gc, 0, 0, selStart, selEnd, null, null);
if (hasFocus() && focusIndex != -1) {
Rectangle[] rects = getRectangles(focusIndex);
for (int i = 0; i < rects.length; i++) {
Rectangle rectangle = rects[i];
gc.drawFocus(rectangle.x, rectangle.y, rectangle.width, rectangle.height);
}
}
if (hooks(SWT.Paint) || filters(SWT.Paint)) {
Event event = new Event();
event.gc = gc;
event.x = rect.left;
event.y = rect.top;
event.width = rect.right - rect.left;
event.height = rect.bottom - rect.top;
sendEvent(SWT.Paint, event);
event.gc = null;
}
}
LRESULT WM_SETFONT(int /*long*/ wParam, int /*long*/ lParam) {
if (OS.COMCTL32_MAJOR < 6) {
layout.setFont(Font.win32_new(display, wParam));
}
if (lParam != 0) OS.InvalidateRect(handle, null, true);
return super.WM_SETFONT(font = wParam, lParam);
}
@Override
long /*int*/ gtk_key_press_event(long /*int*/ widget, long /*int*/ eventPtr) {
long /*int*/ result = super.gtk_key_press_event(widget, eventPtr);
if (result != 0) return result;
if (focusIndex == -1) return result;
GdkEventKey gdkEvent = new GdkEventKey();
OS.memmove(gdkEvent, eventPtr, GdkEventKey.sizeof);
switch (gdkEvent.keyval) {
case OS.GDK_Return:
case OS.GDK_KP_Enter:
case OS.GDK_space:
Event event = new Event();
event.text = ids[focusIndex];
sendSelectionEvent(SWT.Selection, event, true);
break;
case OS.GDK_Tab:
if (focusIndex < offsets.length - 1) {
focusIndex++;
redraw();
}
break;
case OS.GDK_ISO_Left_Tab:
if (focusIndex > 0) {
focusIndex--;
redraw();
}
break;
}
return result;
}
void enableWidget(boolean enabled) {
if (OS.COMCTL32_MAJOR >= 6) {
LITEM item = new LITEM();
item.mask = OS.LIF_ITEMINDEX | OS.LIF_STATE;
item.stateMask = OS.LIS_ENABLED;
item.state = enabled ? OS.LIS_ENABLED : 0;
while (OS.SendMessage(handle, OS.LM_SETITEM, 0, item) != 0) {
item.iLink++;
}
} else {
TextStyle linkStyle = new TextStyle(null, enabled ? linkColor : disabledColor, null);
linkStyle.underline = true;
for (int i = 0; i < offsets.length; i++) {
Point point = offsets[i];
layout.setStyle(linkStyle, point.x, point.y);
}
redraw();
}
/*
* Feature in Windows. For some reason, setting
* LIS_ENABLED state using LM_SETITEM causes the
* SysLink to become enabled. To be specific,
* calling IsWindowEnabled() returns true. The
* fix is disable the SysLink after LM_SETITEM.
*/
super.enableWidget(enabled);
}
/**
* Sets the receiver's text.
*
* <p>The string can contain both regular text and hyperlinks. A hyperlink is delimited by an
* anchor tag, <A> and </A>. Within an anchor, a single HREF attribute is supported.
* When a hyperlink is selected, the text field of the selection event contains either the text of
* the hyperlink or the value of its HREF, if one was specified. In the rare case of identical
* hyperlinks within the same string, the HREF attribute can be used to distinguish between them.
* The string may include the mnemonic character and line delimiters. The only delimiter the HREF
* attribute supports is the quotation mark (").
*
* <p>Mnemonics are indicated by an '&' that causes the next character to be the mnemonic. The
* receiver can have a mnemonic in the text preceding each link. When the user presses a key
* sequence that matches the mnemonic, focus is assigned to the link that follows the text.
* Mnemonics in links and in the trailing text are ignored. 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.
*
* @param string the new text
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the text is null
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public void setText(String string) {
checkWidget();
if (string == null) error(SWT.ERROR_NULL_ARGUMENT);
if (string.equals(text)) return;
text = string;
if (OS.COMCTL32_MAJOR >= 6) {
boolean enabled = OS.IsWindowEnabled(handle);
/*
* Bug in Windows. For some reason, when SetWindowText()
* is used to set the text of a link control to the empty
* string, the old text remains. The fix is to set the
* text to a space instead.
*/
if (string.length() == 0) string = " "; // $NON-NLS-1$
TCHAR buffer = new TCHAR(getCodePage(), string, true);
OS.SetWindowText(handle, buffer);
parse(text);
enableWidget(enabled);
} else {
layout.setText(parse(text));
focusIndex = offsets.length > 0 ? 0 : -1;
selection.x = selection.y = -1;
int bits = OS.GetWindowLong(handle, OS.GWL_STYLE);
if (offsets.length > 0) {
bits |= OS.WS_TABSTOP;
} else {
bits &= ~OS.WS_TABSTOP;
}
OS.SetWindowLong(handle, OS.GWL_STYLE, bits);
boolean enabled = OS.IsWindowEnabled(handle);
TextStyle linkStyle = new TextStyle(null, enabled ? linkColor : disabledColor, null);
linkStyle.underline = true;
for (int i = 0; i < offsets.length; i++) {
Point point = offsets[i];
layout.setStyle(linkStyle, point.x, point.y);
}
TextStyle mnemonicStyle = new TextStyle(null, null, null);
mnemonicStyle.underline = true;
for (int i = 0; i < mnemonics.length; i++) {
int mnemonic = mnemonics[i];
if (mnemonic != -1) {
layout.setStyle(mnemonicStyle, mnemonic, mnemonic);
}
}
redraw();
}
}
void createHandle() {
super.createHandle();
state |= THEME_BACKGROUND;
if (OS.COMCTL32_MAJOR < 6) {
layout = new TextLayout(display);
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) {
linkColor = Color.win32_new(display, OS.GetSysColor(OS.COLOR_HOTLIGHT));
} else {
linkColor = new Color(display, LINK_FOREGROUND);
}
disabledColor = Color.win32_new(display, OS.GetSysColor(OS.COLOR_GRAYTEXT));
offsets = new Point[0];
ids = new String[0];
mnemonics = new int[0];
selection = new Point(-1, -1);
focusIndex = mouseDownIndex = -1;
}
}
LRESULT WM_SIZE(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_SIZE(wParam, lParam);
if (OS.COMCTL32_MAJOR < 6) {
RECT rect = new RECT();
OS.GetClientRect(handle, rect);
layout.setWidth(rect.right > 0 ? rect.right : -1);
redraw();
}
return result;
}
LRESULT wmColorChild(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.wmColorChild(wParam, lParam);
/*
* Feature in Windows. When a SysLink is disabled, it does
* not gray out the non-link portion of the text. The fix
* is to set the text color to the system gray color.
*/
if (OS.COMCTL32_MAJOR >= 6) {
if (!OS.IsWindowEnabled(handle)) {
OS.SetTextColor(wParam, OS.GetSysColor(OS.COLOR_GRAYTEXT));
if (result == null) {
int backPixel = getBackgroundPixel();
OS.SetBkColor(wParam, backPixel);
int /*long*/ hBrush = findBrush(backPixel, OS.BS_SOLID);
return new LRESULT(hBrush);
}
}
}
return result;
}
LRESULT WM_LBUTTONUP(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_LBUTTONUP(wParam, lParam);
if (result == LRESULT.ZERO) return result;
if (OS.COMCTL32_MAJOR < 6) {
if (mouseDownIndex == -1) return result;
int x = OS.GET_X_LPARAM(lParam);
int y = OS.GET_Y_LPARAM(lParam);
Rectangle[] rects = getRectangles(mouseDownIndex);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
if (rect.contains(x, y)) {
Event event = new Event();
event.text = ids[mouseDownIndex];
sendSelectionEvent(SWT.Selection, event, true);
break;
}
}
}
mouseDownIndex = -1;
return result;
}
@Override
long /*int*/ gtk_event_after(long /*int*/ widget, long /*int*/ gdkEvent) {
long /*int*/ result = super.gtk_event_after(widget, gdkEvent);
GdkEvent event = new GdkEvent();
OS.memmove(event, gdkEvent, GdkEvent.sizeof);
switch (event.type) {
case OS.GDK_FOCUS_CHANGE:
redraw();
break;
}
return result;
}
int /*long*/ callWindowProc(
int /*long*/ hwnd, int msg, int /*long*/ wParam, int /*long*/ lParam) {
if (handle == 0) return 0;
if (LinkProc != 0) {
/*
* Feature in Windows. By convention, native Windows controls
* check for a non-NULL wParam, assume that it is an HDC and
* paint using that device. The SysLink control does not.
* The fix is to check for an HDC and use WM_PRINTCLIENT.
*/
switch (msg) {
case OS.WM_PAINT:
if (wParam != 0) {
OS.SendMessage(hwnd, OS.WM_PRINTCLIENT, wParam, 0);
return 0;
}
break;
}
return OS.CallWindowProc(LinkProc, hwnd, msg, wParam, lParam);
}
return OS.DefWindowProc(hwnd, msg, wParam, lParam);
}
boolean mnemonicHit(char key) {
if (mnemonics != null) {
char uckey = Character.toUpperCase(key);
String parsedText = parse(text);
for (int i = 0; i < mnemonics.length - 1; i++) {
if (mnemonics[i] != -1) {
char mnemonic = parsedText.charAt(mnemonics[i]);
if (uckey == Character.toUpperCase(mnemonic)) {
if (!setFocus()) return false;
if (OS.COMCTL32_MAJOR >= 6) {
int bits = OS.GetWindowLong(handle, OS.GWL_STYLE);
LITEM item = new LITEM();
item.mask = OS.LIF_ITEMINDEX | OS.LIF_STATE;
item.stateMask = OS.LIS_FOCUSED;
while (item.iLink < mnemonics.length) {
if (item.iLink != i) OS.SendMessage(handle, OS.LM_SETITEM, 0, item);
item.iLink++;
}
item.iLink = i;
item.state = OS.LIS_FOCUSED;
OS.SendMessage(handle, OS.LM_SETITEM, 0, item);
/* Feature in Windows. For some reason, setting the focus to
* any item but first causes the control to clear the WS_TABSTOP
* bit. The fix is always to reset the bit.
*/
OS.SetWindowLong(handle, OS.GWL_STYLE, bits);
} else {
focusIndex = i;
redraw();
}
return true;
}
}
}
}
return false;
}
LRESULT WM_PRINTCLIENT(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_PRINTCLIENT(wParam, lParam);
if (OS.COMCTL32_MAJOR < 6) {
RECT rect = new RECT();
OS.GetClientRect(handle, rect);
GCData data = new GCData();
data.device = display;
data.foreground = getForegroundPixel();
GC gc = GC.win32_new(wParam, data);
drawWidget(gc, rect);
gc.dispose();
}
return result;
}
LRESULT WM_LBUTTONDOWN(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_LBUTTONDOWN(wParam, lParam);
if (result == LRESULT.ZERO) return result;
if (OS.COMCTL32_MAJOR < 6) {
if (focusIndex != -1) setFocus();
int x = OS.GET_X_LPARAM(lParam);
int y = OS.GET_Y_LPARAM(lParam);
int offset = layout.getOffset(x, y, null);
int oldSelectionX = selection.x;
int oldSelectionY = selection.y;
selection.x = offset;
selection.y = -1;
if (oldSelectionX != -1 && oldSelectionY != -1) {
if (oldSelectionX > oldSelectionY) {
int temp = oldSelectionX;
oldSelectionX = oldSelectionY;
oldSelectionY = temp;
}
Rectangle rect = layout.getBounds(oldSelectionX, oldSelectionY);
redraw(rect.x, rect.y, rect.width, rect.height, false);
}
for (int j = 0; j < offsets.length; j++) {
Rectangle[] rects = getRectangles(j);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
if (rect.contains(x, y)) {
if (j != focusIndex) {
redraw();
}
focusIndex = mouseDownIndex = j;
return result;
}
}
}
}
return result;
}
LRESULT wmNotifyChild(NMHDR hdr, int /*long*/ wParam, int /*long*/ lParam) {
if (OS.COMCTL32_MAJOR >= 6) {
switch (hdr.code) {
case OS.NM_RETURN:
case OS.NM_CLICK:
NMLINK item = new NMLINK();
OS.MoveMemory(item, lParam, NMLINK.sizeof);
Event event = new Event();
event.text = ids[item.iLink];
sendSelectionEvent(SWT.Selection, event, true);
break;
}
}
return super.wmNotifyChild(hdr, wParam, lParam);
}
public Point computeSize(int wHint, int hHint, boolean changed) {
checkWidget();
if (wHint != SWT.DEFAULT && wHint < 0) wHint = 0;
if (hHint != SWT.DEFAULT && hHint < 0) hHint = 0;
int width, height;
if (OS.COMCTL32_MAJOR >= 6) {
int /*long*/ hDC = OS.GetDC(handle);
int /*long*/ newFont = OS.SendMessage(handle, OS.WM_GETFONT, 0, 0);
int /*long*/ oldFont = OS.SelectObject(hDC, newFont);
if (text.length() > 0) {
TCHAR buffer = new TCHAR(getCodePage(), parse(text), false);
RECT rect = new RECT();
int flags = OS.DT_CALCRECT | OS.DT_NOPREFIX;
if (wHint != SWT.DEFAULT) {
flags |= OS.DT_WORDBREAK;
rect.right = wHint;
}
OS.DrawText(hDC, buffer, buffer.length(), rect, flags);
width = rect.right - rect.left;
height = rect.bottom;
} else {
TEXTMETRIC lptm = OS.IsUnicode ? (TEXTMETRIC) new TEXTMETRICW() : new TEXTMETRICA();
OS.GetTextMetrics(hDC, lptm);
width = 0;
height = lptm.tmHeight;
}
if (newFont != 0) OS.SelectObject(hDC, oldFont);
OS.ReleaseDC(handle, hDC);
} else {
int layoutWidth = layout.getWidth();
// TEMPORARY CODE
if (wHint == 0) {
layout.setWidth(1);
Rectangle rect = layout.getBounds();
width = 0;
height = rect.height;
} else {
layout.setWidth(wHint);
Rectangle rect = layout.getBounds();
width = rect.width;
height = rect.height;
}
layout.setWidth(layoutWidth);
}
if (wHint != SWT.DEFAULT) width = wHint;
if (hHint != SWT.DEFAULT) height = hHint;
int border = getBorderWidth();
width += border * 2;
height += border * 2;
return new Point(width, height);
}
@Override
void createHandle(int index) {
state |= HANDLE | THEME_BACKGROUND;
handle = OS.g_object_new(display.gtk_fixed_get_type(), 0);
if (handle == 0) error(SWT.ERROR_NO_HANDLES);
gtk_widget_set_has_window(handle, true);
gtk_widget_set_can_focus(handle, true);
layout = new TextLayout(display);
linkColor = display.getSystemColor(SWT.COLOR_LINK_FOREGROUND);
disabledColor = new Color(display, LINK_DISABLED_FOREGROUND);
offsets = new Point[0];
ids = new String[0];
mnemonics = new int[0];
selection = new Point(-1, -1);
focusIndex = -1;
}
LRESULT WM_CHAR(int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_CHAR(wParam, lParam);
if (result != null) return result;
if (OS.COMCTL32_MAJOR < 6) {
if (focusIndex == -1) return result;
switch ((int) /*64*/ wParam) {
case ' ':
case SWT.CR:
Event event = new Event();
event.text = ids[focusIndex];
sendSelectionEvent(SWT.Selection, event, true);
break;
case SWT.TAB:
boolean next = OS.GetKeyState(OS.VK_SHIFT) >= 0;
if (next) {
if (focusIndex < offsets.length - 1) {
focusIndex++;
redraw();
}
} else {
if (focusIndex > 0) {
focusIndex--;
redraw();
}
}
break;
}
} else {
switch ((int) /*64*/ wParam) {
case ' ':
case SWT.CR:
case SWT.TAB:
/*
* NOTE: Call the window proc with WM_KEYDOWN rather than WM_CHAR
* so that the key that was ignored during WM_KEYDOWN is processed.
* This allows the application to cancel an operation that is normally
* performed in WM_KEYDOWN from WM_CHAR.
*/
int /*long*/ code = callWindowProc(handle, OS.WM_KEYDOWN, wParam, lParam);
return new LRESULT(code);
}
}
return result;
}
LRESULT WM_PAINT(int /*long*/ wParam, int /*long*/ lParam) {
if (OS.COMCTL32_MAJOR >= 6) {
return super.WM_PAINT(wParam, lParam);
}
PAINTSTRUCT ps = new PAINTSTRUCT();
GCData data = new GCData();
data.ps = ps;
data.hwnd = handle;
GC gc = new_GC(data);
if (gc != null) {
int width = ps.right - ps.left;
int height = ps.bottom - ps.top;
if (width != 0 && height != 0) {
RECT rect = new RECT();
OS.SetRect(rect, ps.left, ps.top, ps.right, ps.bottom);
drawWidget(gc, rect);
}
gc.dispose();
}
return LRESULT.ZERO;
}
@Override
long /*int*/ gtk_button_press_event(long /*int*/ widget, long /*int*/ event) {
long /*int*/ result = super.gtk_button_press_event(widget, event);
if (result != 0) return result;
GdkEventButton gdkEvent = new GdkEventButton();
OS.memmove(gdkEvent, event, GdkEventButton.sizeof);
if (gdkEvent.button == 1 && gdkEvent.type == OS.GDK_BUTTON_PRESS) {
if (focusIndex != -1) setFocus();
int x = (int) gdkEvent.x;
int y = (int) gdkEvent.y;
if ((style & SWT.MIRRORED) != 0) x = getClientWidth() - x;
int offset = layout.getOffset(x, y, null);
int oldSelectionX = selection.x;
int oldSelectionY = selection.y;
selection.x = offset;
selection.y = -1;
if (oldSelectionX != -1 && oldSelectionY != -1) {
if (oldSelectionX > oldSelectionY) {
int temp = oldSelectionX;
oldSelectionX = oldSelectionY;
oldSelectionY = temp;
}
Rectangle rect = layout.getBounds(oldSelectionX, oldSelectionY);
redraw(rect.x, rect.y, rect.width, rect.height, false);
}
for (int j = 0; j < offsets.length; j++) {
Rectangle[] rects = getRectangles(j);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
if (rect.contains(x, y)) {
focusIndex = j;
redraw();
return result;
}
}
}
}
return result;
}
@Override
long /*int*/ gtk_motion_notify_event(long /*int*/ widget, long /*int*/ event) {
long /*int*/ result = super.gtk_motion_notify_event(widget, event);
if (result != 0) return result;
GdkEventMotion gdkEvent = new GdkEventMotion();
OS.memmove(gdkEvent, event, GdkEventMotion.sizeof);
int x = (int) gdkEvent.x;
int y = (int) gdkEvent.y;
if ((style & SWT.MIRRORED) != 0) x = getClientWidth() - x;
if ((gdkEvent.state & OS.GDK_BUTTON1_MASK) != 0) {
int oldSelection = selection.y;
selection.y = layout.getOffset(x, y, null);
if (selection.y != oldSelection) {
int newSelection = selection.y;
if (oldSelection > newSelection) {
int temp = oldSelection;
oldSelection = newSelection;
newSelection = temp;
}
Rectangle rect = layout.getBounds(oldSelection, newSelection);
redraw(rect.x, rect.y, rect.width, rect.height, false);
}
} else {
for (int j = 0; j < offsets.length; j++) {
Rectangle[] rects = getRectangles(j);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
if (rect.contains(x, y)) {
setCursor(display.getSystemCursor(SWT.CURSOR_HAND));
return result;
}
}
}
setCursor(null);
}
return result;
}
@Override
long /*int*/ gtk_button_release_event(long /*int*/ widget, long /*int*/ event) {
long /*int*/ result = super.gtk_button_release_event(widget, event);
if (result != 0) return result;
if (focusIndex == -1) return result;
GdkEventButton gdkEvent = new GdkEventButton();
OS.memmove(gdkEvent, event, GdkEventButton.sizeof);
if (gdkEvent.button == 1) {
int x = (int) gdkEvent.x;
int y = (int) gdkEvent.y;
if ((style & SWT.MIRRORED) != 0) x = getClientWidth() - x;
Rectangle[] rects = getRectangles(focusIndex);
for (int i = 0; i < rects.length; i++) {
Rectangle rect = rects[i];
if (rect.contains(x, y)) {
Event ev = new Event();
ev.text = ids[focusIndex];
sendSelectionEvent(SWT.Selection, ev, true);
return result;
}
}
}
return result;
}
static {
if (OS.COMCTL32_MAJOR >= 6) {
WNDCLASS lpWndClass = new WNDCLASS();
OS.GetClassInfo(0, LinkClass, lpWndClass);
LinkProc = lpWndClass.lpfnWndProc;
/*
* Feature in Windows. The SysLink window class
* does not include CS_DBLCLKS. This means that these
* controls will not get double click messages such as
* WM_LBUTTONDBLCLK. The fix is to register a new
* window class with CS_DBLCLKS.
*
* NOTE: Screen readers look for the exact class name
* of the control in order to provide the correct kind
* of assistance. Therefore, it is critical that the
* new window class have the same name. It is possible
* to register a local window class with the same name
* as a global class. Since bits that affect the class
* are being changed, it is possible that other native
* code, other than SWT, could create a control with
* this class name, and fail unexpectedly.
*/
int /*long*/ hInstance = OS.GetModuleHandle(null);
int /*long*/ hHeap = OS.GetProcessHeap();
lpWndClass.hInstance = hInstance;
lpWndClass.style &= ~OS.CS_GLOBALCLASS;
lpWndClass.style |= OS.CS_DBLCLKS;
int byteCount = LinkClass.length() * TCHAR.sizeof;
int /*long*/ lpszClassName = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
OS.MoveMemory(lpszClassName, LinkClass, byteCount);
lpWndClass.lpszClassName = lpszClassName;
OS.RegisterClass(lpWndClass);
OS.HeapFree(hHeap, 0, lpszClassName);
} else {
LinkProc = 0;
}
}