/**
* Sets the image the receiver will display to the argument.
*
* <p>Note: This operation is a hint and is not supported on platforms that do not have this
* concept (for example, Windows NT). Furthermore, some platforms (such as GTK), cannot display
* both a check box and an image at the same time. Instead, they hide the image and display the
* check box.
*
* @param image the image to display
* @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 setImage(Image image) {
checkWidget();
if ((style & SWT.SEPARATOR) != 0) return;
super.setImage(image);
if (OS.IsWinCE) {
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
long /*int*/ hwndCB = parent.hwndCB;
TBBUTTONINFO info = new TBBUTTONINFO();
info.cbSize = TBBUTTONINFO.sizeof;
info.dwMask = OS.TBIF_IMAGE;
info.iImage = parent.imageIndex(image);
OS.SendMessage(hwndCB, OS.TB_SETBUTTONINFO, id, info);
}
return;
}
if (OS.WIN32_VERSION < OS.VERSION(4, 10)) return;
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_BITMAP;
if (parent.foreground != -1) {
info.hbmpItem = OS.HBMMENU_CALLBACK;
} else {
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(6, 0) && OS.IsAppThemed()) {
if (hBitmap != 0) OS.DeleteObject(hBitmap);
info.hbmpItem = hBitmap = image != null ? Display.create32bitDIB(image) : 0;
} else {
info.hbmpItem = image != null ? OS.HBMMENU_CALLBACK : 0;
}
}
long /*int*/ hMenu = parent.handle;
OS.SetMenuItemInfo(hMenu, id, false, info);
parent.redraw();
}
void releaseChildren(boolean destroy) {
if (menu != null) {
menu.release(false);
menu = null;
}
super.releaseChildren(destroy);
}
/**
* Returns <code>true</code> if the receiver is enabled, and <code>false</code> otherwise. A
* disabled menu item is typically not selectable from the user interface and draws with an
* inactive or "grayed" look.
*
* @return the receiver's enabled state
* @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>
*
* @see #isEnabled
*/
public boolean getEnabled() {
checkWidget();
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
long /*int*/ hwndCB = parent.hwndCB;
TBBUTTONINFO info = new TBBUTTONINFO();
info.cbSize = TBBUTTONINFO.sizeof;
info.dwMask = OS.TBIF_STATE;
OS.SendMessage(hwndCB, OS.TB_GETBUTTONINFO, id, info);
return (info.fsState & OS.TBSTATE_ENABLED) != 0;
}
/*
* Feature in Windows. For some reason, when the menu item
* is a separator, GetMenuItemInfo() always indicates that
* the item is not enabled. The fix is to track the enabled
* state for separators.
*/
if ((style & SWT.SEPARATOR) != 0) {
return (state & DISABLED) == 0;
}
long /*int*/ hMenu = parent.handle;
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_STATE;
boolean success;
if (OS.IsWinCE) {
int index = parent.indexOf(this);
if (index == -1) error(SWT.ERROR_CANNOT_GET_ENABLED);
success = OS.GetMenuItemInfo(hMenu, index, true, info);
} else {
success = OS.GetMenuItemInfo(hMenu, id, false, info);
}
if (!success) error(SWT.ERROR_CANNOT_GET_ENABLED);
return (info.fState & (OS.MFS_DISABLED | OS.MFS_GRAYED)) == 0;
}
MenuItem(Menu parent, Menu menu, int style, int index) {
super(parent, checkStyle(style));
this.parent = parent;
this.menu = menu;
this.index = index;
if (menu != null) menu.cascade = this;
display.addMenuItem(this);
}
void setOrientation(int orientation) {
long /*int*/ hMenu = parent.handle;
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_FTYPE;
info.fType = widgetStyle();
OS.SetMenuItemInfo(hMenu, id, false, info);
if (menu != null) menu._setOrientation(orientation);
}
void selectRadio() {
int index = 0;
MenuItem[] items = parent.getItems();
while (index < items.length && items[index] != this) index++;
int i = index - 1;
while (i >= 0 && items[i].setRadioSelection(false)) --i;
int j = index + 1;
while (j < items.length && items[j].setRadioSelection(false)) j++;
setSelection(true);
}
void releaseWidget() {
super.releaseWidget();
if (hBitmap != 0) OS.DeleteObject(hBitmap);
hBitmap = 0;
if (accelerator != 0) {
parent.destroyAccelerators();
}
accelerator = 0;
display.removeMenuItem(this);
}
/**
* Sets the selection state of the receiver.
*
* <p>When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, it is selected when
* it is checked.
*
* @param selected the new selection state
* @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 setSelection(boolean selected) {
checkWidget();
if ((style & (SWT.CHECK | SWT.RADIO)) == 0) return;
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) return;
long /*int*/ hMenu = parent.handle;
if (OS.IsWinCE) {
int index = parent.indexOf(this);
if (index == -1) return;
int uCheck = OS.MF_BYPOSITION | (selected ? OS.MF_CHECKED : OS.MF_UNCHECKED);
OS.CheckMenuItem(hMenu, index, uCheck);
} else {
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_STATE;
boolean success = OS.GetMenuItemInfo(hMenu, id, false, info);
if (!success) error(SWT.ERROR_CANNOT_SET_SELECTION);
info.fState &= ~OS.MFS_CHECKED;
if (selected) info.fState |= OS.MFS_CHECKED;
success = OS.SetMenuItemInfo(hMenu, id, false, info);
if (!success) {
/*
* Bug in Windows. For some reason SetMenuItemInfo(),
* returns a fail code when setting the enabled or
* selected state of a default item, but sets the
* state anyway. The fix is to ignore the error.
*
* NOTE: This only happens on Vista.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(6, 0)) {
success = id == OS.GetMenuDefaultItem(hMenu, OS.MF_BYCOMMAND, OS.GMDI_USEDISABLED);
}
if (!success) {
int error = OS.GetLastError();
SWT.error(
SWT.ERROR_CANNOT_SET_SELECTION,
null,
" [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
}
}
}
parent.redraw();
}
LRESULT wmCommandChild(long /*int*/ wParam, long /*int*/ lParam) {
if ((style & SWT.CHECK) != 0) {
setSelection(!getSelection());
} else {
if ((style & SWT.RADIO) != 0) {
if ((parent.getStyle() & SWT.NO_RADIO_GROUP) != 0) {
setSelection(!getSelection());
} else {
selectRadio();
}
}
}
sendSelectionEvent(SWT.Selection);
return null;
}
/**
* Sets the receiver's pull down menu to the argument. Only <code>CASCADE</code> menu items can
* have a pull down menu. The sequence of key strokes, button presses and/or button releases that
* are used to request a pull down menu is platform specific.
*
* <p>Note: Disposing of a menu item that has a pull down menu will dispose of the menu. To avoid
* this behavior, set the menu to null before the menu item is disposed.
*
* @param menu the new pull down menu
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_MENU_NOT_DROP_DOWN - if the menu is not a drop down menu
* <li>ERROR_MENUITEM_NOT_CASCADE - if the menu item is not a <code>CASCADE</code>
* <li>ERROR_INVALID_ARGUMENT - if the menu has been disposed
* <li>ERROR_INVALID_PARENT - if the menu is not in the same widget tree
* </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 setMenu(Menu menu) {
checkWidget();
/* Check to make sure the new menu is valid */
if ((style & SWT.CASCADE) == 0) {
error(SWT.ERROR_MENUITEM_NOT_CASCADE);
}
if (menu != null) {
if (menu.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT);
if ((menu.style & SWT.DROP_DOWN) == 0) {
error(SWT.ERROR_MENU_NOT_DROP_DOWN);
}
if (menu.parent != parent.parent) {
error(SWT.ERROR_INVALID_PARENT);
}
}
setMenu(menu, false);
}
/**
* Returns a rectangle describing the receiver's size and location relative to its parent (or its
* display if its parent is null).
*
* @return the receiver's bounding rectangle
* @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>
*
* @since 3.1
*/
/*public*/ Rectangle getBounds() {
checkWidget();
if (OS.IsWinCE) return new Rectangle(0, 0, 0, 0);
int index = parent.indexOf(this);
if (index == -1) return new Rectangle(0, 0, 0, 0);
if ((parent.style & SWT.BAR) != 0) {
Decorations shell = parent.parent;
if (shell.menuBar != parent) {
return new Rectangle(0, 0, 0, 0);
}
long /*int*/ hwndShell = shell.handle;
MENUBARINFO info1 = new MENUBARINFO();
info1.cbSize = MENUBARINFO.sizeof;
if (!OS.GetMenuBarInfo(hwndShell, OS.OBJID_MENU, 1, info1)) {
return new Rectangle(0, 0, 0, 0);
}
MENUBARINFO info2 = new MENUBARINFO();
info2.cbSize = MENUBARINFO.sizeof;
if (!OS.GetMenuBarInfo(hwndShell, OS.OBJID_MENU, index + 1, info2)) {
return new Rectangle(0, 0, 0, 0);
}
int x = info2.left - info1.left;
int y = info2.top - info1.top;
int width = info2.right - info2.left;
int height = info2.bottom - info2.top;
return new Rectangle(x, y, width, height);
} else {
long /*int*/ hMenu = parent.handle;
RECT rect1 = new RECT();
if (!OS.GetMenuItemRect(0, hMenu, 0, rect1)) {
return new Rectangle(0, 0, 0, 0);
}
RECT rect2 = new RECT();
if (!OS.GetMenuItemRect(0, hMenu, index, rect2)) {
return new Rectangle(0, 0, 0, 0);
}
int x = rect2.left - rect1.left + 2;
int y = rect2.top - rect1.top + 2;
int width = rect2.right - rect2.left;
int height = rect2.bottom - rect2.top;
return new Rectangle(x, y, width, height);
}
}
LRESULT wmMeasureChild(long /*int*/ wParam, long /*int*/ lParam) {
MEASUREITEMSTRUCT struct = new MEASUREITEMSTRUCT();
OS.MoveMemory(struct, lParam, MEASUREITEMSTRUCT.sizeof);
int width = 0, height = 0;
if (image != null) {
Rectangle rect = image.getBounds();
width = rect.width;
height = rect.height;
} else {
/*
* Bug in Windows. If a menu contains items that have
* images and can be checked, Windows does not include
* the width of the image and the width of the check when
* computing the width of the menu. When the longest item
* does not have an image, the label and the accelerator
* text can overlap. The fix is to use SetMenuItemInfo()
* to indicate that all items have a bitmap and then include
* the width of the widest bitmap in WM_MEASURECHILD.
*/
MENUINFO lpcmi = new MENUINFO();
lpcmi.cbSize = MENUINFO.sizeof;
lpcmi.fMask = OS.MIM_STYLE;
long /*int*/ hMenu = parent.handle;
OS.GetMenuInfo(hMenu, lpcmi);
if ((lpcmi.dwStyle & OS.MNS_CHECKORBMP) == 0) {
MenuItem[] items = parent.getItems();
for (int i = 0; i < items.length; i++) {
MenuItem item = items[i];
if (item.image != null) {
Rectangle rect = item.image.getBounds();
width = Math.max(width, rect.width);
}
}
}
}
if (width != 0 || height != 0) {
struct.itemWidth = width + MARGIN_WIDTH * 2;
struct.itemHeight = height + MARGIN_HEIGHT * 2;
OS.MoveMemory(lParam, struct, MEASUREITEMSTRUCT.sizeof);
}
return null;
}
/**
* Constructs a new instance of this class given its parent (which must be a <code>Menu</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.
*
* @param parent a menu 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
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
* </ul>
*
* @see SWT#CHECK
* @see SWT#CASCADE
* @see SWT#PUSH
* @see SWT#RADIO
* @see SWT#SEPARATOR
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public MenuItem(Menu parent, int style) {
super(parent, checkStyle(style));
this.parent = parent;
parent.createItem(this, (index = parent.getItemCount()));
}
/**
* Sets the receiver's text. The string may include the mnemonic character and accelerator text.
*
* <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, a selection event occurs. 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>Accelerator text is indicated by the '\t' character. On platforms that support accelerator
* text, the text that follows the '\t' character is displayed to the user, typically indicating
* the key stroke that will cause the item to become selected. On most platforms, the accelerator
* text appears right aligned in the menu. Setting the accelerator text does not install the
* accelerator key sequence. The accelerator key sequence is installed using #setAccelerator.
*
* @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>
*
* @see #setAccelerator
*/
public void setText(String string) {
checkWidget();
if (string == null) error(SWT.ERROR_NULL_ARGUMENT);
if ((style & SWT.SEPARATOR) != 0) return;
if (text.equals(string)) return;
super.setText(string);
long /*int*/ hHeap = OS.GetProcessHeap();
long /*int*/ pszText = 0;
boolean success = false;
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
/*
* Bug in WinCE PPC. Tool items on the menubar don't resize
* correctly when the character '&' is used (even when it
* is a sequence '&&'). The fix is to remove all '&' from
* the string.
*/
if (string.indexOf('&') != -1) {
int length = string.length();
char[] text = new char[length];
string.getChars(0, length, text, 0);
int i = 0, j = 0;
for (i = 0; i < length; i++) {
if (text[i] != '&') text[j++] = text[i];
}
if (j < i) string = new String(text, 0, j);
}
/* Use the character encoding for the default locale */
TCHAR buffer = new TCHAR(0, string, true);
int byteCount = buffer.length() * TCHAR.sizeof;
pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
OS.MoveMemory(pszText, buffer, byteCount);
long /*int*/ hwndCB = parent.hwndCB;
TBBUTTONINFO info2 = new TBBUTTONINFO();
info2.cbSize = TBBUTTONINFO.sizeof;
info2.dwMask = OS.TBIF_TEXT;
info2.pszText = pszText;
success = OS.SendMessage(hwndCB, OS.TB_SETBUTTONINFO, id, info2) != 0;
} else {
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
long /*int*/ hMenu = parent.handle;
/* Use the character encoding for the default locale */
TCHAR buffer = new TCHAR(0, string, true);
int byteCount = buffer.length() * TCHAR.sizeof;
pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
OS.MoveMemory(pszText, buffer, byteCount);
/*
* Bug in Windows 2000. For some reason, when MIIM_TYPE is set
* on a menu item that also has MIIM_BITMAP, the MIIM_TYPE clears
* the MIIM_BITMAP style. The fix is to use MIIM_STRING.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) {
info.fMask = OS.MIIM_STRING;
} else {
info.fMask = OS.MIIM_TYPE;
info.fType = widgetStyle();
}
info.dwTypeData = pszText;
success = OS.SetMenuItemInfo(hMenu, id, false, info);
}
if (pszText != 0) OS.HeapFree(hHeap, 0, pszText);
if (!success) {
int error = OS.GetLastError();
SWT.error(
SWT.ERROR_CANNOT_SET_TEXT,
null,
" [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
}
parent.redraw();
}
/**
* Enables the receiver if the argument is <code>true</code>, and disables it otherwise. A
* disabled menu item is typically not selectable from the user interface and draws with an
* inactive or "grayed" look.
*
* @param enabled the new enabled state
* @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 setEnabled(boolean enabled) {
checkWidget();
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
long /*int*/ hwndCB = parent.hwndCB;
TBBUTTONINFO info = new TBBUTTONINFO();
info.cbSize = TBBUTTONINFO.sizeof;
info.dwMask = OS.TBIF_STATE;
OS.SendMessage(hwndCB, OS.TB_GETBUTTONINFO, id, info);
info.fsState &= ~OS.TBSTATE_ENABLED;
if (enabled) info.fsState |= OS.TBSTATE_ENABLED;
OS.SendMessage(hwndCB, OS.TB_SETBUTTONINFO, id, info);
} else {
/*
* Feature in Windows. For some reason, when the menu item
* is a separator, GetMenuItemInfo() always indicates that
* the item is not enabled. The fix is to track the enabled
* state for separators.
*/
if ((style & SWT.SEPARATOR) != 0) {
if (enabled) {
state &= ~DISABLED;
} else {
state |= DISABLED;
}
}
long /*int*/ hMenu = parent.handle;
if (OS.IsWinCE) {
int index = parent.indexOf(this);
if (index == -1) return;
int uEnable = OS.MF_BYPOSITION | (enabled ? OS.MF_ENABLED : OS.MF_GRAYED);
OS.EnableMenuItem(hMenu, index, uEnable);
} else {
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_STATE;
boolean success = OS.GetMenuItemInfo(hMenu, id, false, info);
if (!success) {
int error = OS.GetLastError();
SWT.error(
SWT.ERROR_CANNOT_SET_ENABLED,
null,
" [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
}
int bits = OS.MFS_DISABLED | OS.MFS_GRAYED;
if (enabled) {
if ((info.fState & bits) == 0) return;
info.fState &= ~bits;
} else {
if ((info.fState & bits) == bits) return;
info.fState |= bits;
}
success = OS.SetMenuItemInfo(hMenu, id, false, info);
if (!success) {
/*
* Bug in Windows. For some reason SetMenuItemInfo(),
* returns a fail code when setting the enabled or
* selected state of a default item, but sets the
* state anyway. The fix is to ignore the error.
*
* NOTE: This only happens on Vista.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(6, 0)) {
success = id == OS.GetMenuDefaultItem(hMenu, OS.MF_BYCOMMAND, OS.GMDI_USEDISABLED);
}
if (!success) {
int error = OS.GetLastError();
SWT.error(
SWT.ERROR_CANNOT_SET_ENABLED,
null,
" [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
}
}
}
}
parent.destroyAccelerators();
parent.redraw();
}
/**
* Sets the widget accelerator. An accelerator is the bit-wise OR of zero or more modifier masks
* and a key. Examples: <code>SWT.MOD1 | SWT.MOD2 | 'T', SWT.MOD3 | SWT.F2</code>. <code>
* SWT.CONTROL | SWT.SHIFT | 'T', SWT.ALT | SWT.F2</code>. The default value is zero, indicating
* that the menu item does not have an accelerator.
*
* @param accelerator an integer that is the bit-wise OR of masks and a key
* </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 setAccelerator(int accelerator) {
checkWidget();
if (this.accelerator == accelerator) return;
this.accelerator = accelerator;
parent.destroyAccelerators();
}
void reskinChildren(int flags) {
if (menu != null) {
menu.reskin(flags);
}
super.reskinChildren(flags);
}
void releaseParent() {
super.releaseParent();
if (menu != null) menu.dispose();
menu = null;
}
/**
* Constructs a new instance of this class given its parent (which must be a <code>Menu</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.
*
* @param parent a menu 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>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the
* parent (inclusive)
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass
* </ul>
*
* @see SWT#CHECK
* @see SWT#CASCADE
* @see SWT#PUSH
* @see SWT#RADIO
* @see SWT#SEPARATOR
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public MenuItem(Menu parent, int style, int index) {
super(parent, checkStyle(style));
this.parent = parent;
parent.createItem(this, (this.index = index));
}
void fixMenus(Decorations newParent) {
if (menu != null) menu.fixMenus(newParent);
}
void destroyWidget() {
parent.destroyItem(this);
releaseHandle();
}
void setMenu(Menu menu, boolean dispose) {
/* Assign the new menu */
Menu oldMenu = this.menu;
if (oldMenu == menu) return;
if (oldMenu != null) oldMenu.cascade = null;
this.menu = menu;
/* Assign the new menu in the OS */
if ((OS.IsPPC || OS.IsSP) && parent.hwndCB != 0) {
if (OS.IsPPC) {
long /*int*/ hwndCB = parent.hwndCB;
long /*int*/ hMenu = menu == null ? 0 : menu.handle;
OS.SendMessage(hwndCB, OS.SHCMBM_SETSUBMENU, id, hMenu);
}
if (OS.IsSP) error(SWT.ERROR_CANNOT_SET_MENU);
} else {
long /*int*/ hMenu = parent.handle;
MENUITEMINFO info = new MENUITEMINFO();
info.cbSize = MENUITEMINFO.sizeof;
info.fMask = OS.MIIM_DATA;
int index = 0;
while (OS.GetMenuItemInfo(hMenu, index, true, info)) {
if (info.dwItemData == id) break;
index++;
}
if (info.dwItemData != id) return;
int cch = 128;
long /*int*/ hHeap = OS.GetProcessHeap();
int byteCount = cch * TCHAR.sizeof;
long /*int*/ pszText = OS.HeapAlloc(hHeap, OS.HEAP_ZERO_MEMORY, byteCount);
info.fMask = OS.MIIM_STATE | OS.MIIM_ID | OS.MIIM_DATA;
/*
* Bug in Windows. When GetMenuItemInfo() is used to get the text,
* for an item that has a bitmap set using MIIM_BITMAP, the text is
* not returned. This means that when SetMenuItemInfo() is used to
* set the submenu and the current menu state, the text is lost.
* The fix is use MIIM_BITMAP and MIIM_STRING.
*/
if (!OS.IsWinCE && OS.WIN32_VERSION >= OS.VERSION(4, 10)) {
info.fMask |= OS.MIIM_BITMAP | OS.MIIM_STRING;
} else {
info.fMask |= OS.MIIM_TYPE;
}
info.dwTypeData = pszText;
info.cch = cch;
boolean success = OS.GetMenuItemInfo(hMenu, index, true, info);
if (menu != null) {
menu.cascade = this;
info.fMask |= OS.MIIM_SUBMENU;
info.hSubMenu = menu.handle;
}
if (OS.IsWinCE) {
OS.RemoveMenu(hMenu, index, OS.MF_BYPOSITION);
/*
* On WinCE, InsertMenuItem() is not available. The fix is to
* use SetMenuItemInfo() but this call does not set the menu item
* state and submenu. The fix is to use InsertMenu() to insert
* the item, SetMenuItemInfo() to set the string and EnableMenuItem()
* and CheckMenuItem() to set the state.
*/
long /*int*/ uIDNewItem = id;
int uFlags = OS.MF_BYPOSITION;
if (menu != null) {
uFlags |= OS.MF_POPUP;
uIDNewItem = menu.handle;
}
TCHAR lpNewItem = new TCHAR(0, " ", true);
success = OS.InsertMenu(hMenu, index, uFlags, uIDNewItem, lpNewItem);
if (success) {
info.fMask = OS.MIIM_DATA | OS.MIIM_TYPE;
success = OS.SetMenuItemInfo(hMenu, index, true, info);
if ((info.fState & (OS.MFS_DISABLED | OS.MFS_GRAYED)) != 0) {
OS.EnableMenuItem(hMenu, index, OS.MF_BYPOSITION | OS.MF_GRAYED);
}
if ((info.fState & OS.MFS_CHECKED) != 0) {
OS.CheckMenuItem(hMenu, index, OS.MF_BYPOSITION | OS.MF_CHECKED);
}
}
} else {
if (dispose || oldMenu == null) {
success = OS.SetMenuItemInfo(hMenu, index, true, info);
} else {
/*
* Feature in Windows. When SetMenuItemInfo () is used to
* set a submenu and the menu item already has a submenu,
* Windows destroys the previous menu. This is undocumented
* and unexpected but not necessarily wrong. The fix is to
* remove the item with RemoveMenu () which does not destroy
* the submenu and then insert the item with InsertMenuItem ().
*/
OS.RemoveMenu(hMenu, index, OS.MF_BYPOSITION);
success = OS.InsertMenuItem(hMenu, index, true, info);
}
}
if (pszText != 0) OS.HeapFree(hHeap, 0, pszText);
if (!success) {
int error = OS.GetLastError();
SWT.error(
SWT.ERROR_CANNOT_SET_MENU,
null,
" [GetLastError=0x" + Integer.toHexString(error) + "]"); // $NON-NLS-1$ $NON-NLS-2$
}
}
parent.destroyAccelerators();
}
/**
* Returns <code>true</code> if the receiver is enabled and all of the receiver's ancestors are
* enabled, and <code>false</code> otherwise. A disabled menu item is typically not selectable
* from the user interface and draws with an inactive or "grayed" look.
*
* @return the receiver's enabled state
* @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>
*
* @see #getEnabled
*/
public boolean isEnabled() {
return getEnabled() && parent.isEnabled();
}