javauis/eswt_qt/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/widgets/Shell.java
/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation and others.
* Portion Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
* 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
* Nokia Corporation - Qt implementation
*******************************************************************************/
package org.eclipse.swt.widgets;
import java.util.Vector;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ShellListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.internal.qt.OS;
import org.eclipse.swt.internal.qt.SymbianWindowVisibilityListener;
import org.eclipse.swt.internal.qt.WidgetState;
import org.eclipse.swt.internal.qt.graphics.WindowSurface;
/**
* Instances of this class represent the "windows"
* which the desktop or "window manager" is managing.
* Instances that do not have a parent (that is, they
* are built using the constructor, which takes a
* <code>Display</code> as the argument) are described
* as <em>top level</em> shells. Instances that do have
* a parent are described as <em>secondary</em> or
* <em>dialog</em> shells.
* <p>
* Instances are always displayed in one of the maximized,
* minimized or normal states:
* <ul>
* <li>
* When an instance is marked as <em>maximized</em>, the
* window manager will typically resize it to fill the
* entire visible area of the display, and the instance
* is usually put in a state where it can not be resized
* (even if it has style <code>RESIZE</code>) until it is
* no longer maximized.
* </li><li>
* When an instance is in the <em>normal</em> state (neither
* maximized or minimized), its appearance is controlled by
* the style constants which were specified when it was created
* and the restrictions of the window manager (see below).
* </li><li>
* When an instance has been marked as <em>minimized</em>,
* its contents (client area) will usually not be visible,
* and depending on the window manager, it may be
* "iconified" (that is, replaced on the desktop by a small
* simplified representation of itself), relocated to a
* distinguished area of the screen, or hidden. Combinations
* of these changes are also possible.
* </li>
* </ul>
* </p><p>
* The <em>modality</em> of an instance may be specified using
* style bits. The modality style bits are used to determine
* whether input is blocked for other shells on the display.
* The <code>PRIMARY_MODAL</code> style allows an instance to block
* input to its parent. The <code>APPLICATION_MODAL</code> style
* allows an instance to block input to every other shell in the
* display. The <code>SYSTEM_MODAL</code> style allows an instance
* to block input to all shells, including shells belonging to
* different applications.
* </p><p>
* Note: The styles supported by this class are treated
* as <em>HINT</em>s, since the window manager for the
* desktop on which the instance is visible has ultimate
* control over the appearance and behavior of decorations
* and modality. For example, some window managers only
* support resizable windows and will always assume the
* RESIZE style, even if it is not set. In addition, if a
* modality style is not supported, it is "upgraded" to a
* more restrictive modality style that is supported. For
* example, if <code>PRIMARY_MODAL</code> is not supported,
* it would be upgraded to <code>APPLICATION_MODAL</code>.
* A modality style may also be "downgraded" to a less
* restrictive style. For example, most operating systems
* no longer support <code>SYSTEM_MODAL</code> because
* it can freeze up the desktop, so this is typically
* downgraded to <code>APPLICATION_MODAL</code>.
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>BORDER, CLOSE, MIN, MAX, NO_TRIM, RESIZE, TITLE, ON_TOP, TOOL</dd>
* <dd>APPLICATION_MODAL, MODELESS, PRIMARY_MODAL, SYSTEM_MODAL</dd>
* <dt><b>Events:</b></dt>
* <dd>Activate, Close, Deactivate, Deiconify, Iconify</dd>
* </dl>
* Class <code>SWT</code> provides two "convenience constants"
* for the most commonly required style combinations:
* <dl>
* <dt><code>SHELL_TRIM</code></dt>
* <dd>
* the result of combining the constants which are required
* to produce a typical application top level shell: (that
* is, <code>CLOSE | TITLE | MIN | MAX | RESIZE</code>)
* </dd>
* <dt><code>DIALOG_TRIM</code></dt>
* <dd>
* the result of combining the constants which are required
* to produce a typical application dialog shell: (that
* is, <code>TITLE | CLOSE | BORDER</code>)
* </dd>
* </dl>
* </p>
* <p>
* Note: Only one of the styles APPLICATION_MODAL, MODELESS,
* PRIMARY_MODAL and SYSTEM_MODAL may be specified.
* </p><p>
* IMPORTANT: This class is not intended to be subclassed.
* </p>
*
* @see Decorations
* @see SWT
*/
public class Shell extends Decorations {
/**
* Handle of the QMainWindow for a top-level Shell.
* For non top-level Shells this handle is zero.
*/
int mainWindowHandle;
/**
* Handle of the QWidget that owns the window for a dialog Shell. For non-dialog
* Shells this handle is zero.
*/
int dialogWindowHandle;
Rectangle defBounds;
Point oldSize;
/**
* The WindowSurface wrapper for top level shells. Window surface
* provides access for Qt created draw surface.
*/
WindowSurface windowSurface;
/**
* When QMainWindow/QDialog visibility is changed, Qt may send a resize event.
* eSWT application may have a Shell.setVisible() call in Shell's resize event
* handler, which would cause an infinite loop. To prevent this suppress resize
* events when Shell visibility is being changed.
*/
boolean suppressResizeEvent;
private Vector winVisibilityListeners = new Vector();
/**
* Constructs a new instance of this class. This is equivalent
* to calling <code>Shell((Display) null)</code>.
*
* @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>
*/
public Shell () {
this ((Display) null);
}
/**
* Constructs a new instance of this class given only the style
* value describing its behavior and appearance. This is equivalent
* to calling <code>Shell((Display) null, style)</code>.
* <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 style the style of control to construct
*
* @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#BORDER
* @see SWT#CLOSE
* @see SWT#MIN
* @see SWT#MAX
* @see SWT#RESIZE
* @see SWT#TITLE
* @see SWT#NO_TRIM
* @see SWT#SHELL_TRIM
* @see SWT#DIALOG_TRIM
* @see SWT#MODELESS
* @see SWT#PRIMARY_MODAL
* @see SWT#APPLICATION_MODAL
* @see SWT#SYSTEM_MODAL
*/
public Shell (int style) {
this ((Display) null, style);
}
/**
* Constructs a new instance of this class given only the display
* to create it on. It is created with style <code>SWT.SHELL_TRIM</code>.
* <p>
* Note: Currently, null can be passed in for the display argument.
* This has the effect of creating the shell on the currently active
* display if there is one. If there is no current display, the
* shell is created on a "default" display. <b>Passing in null as
* the display argument is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param display the display to create the shell on
*
* @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>
*/
public Shell (Display display) {
this (display, SWT.SHELL_TRIM);
}
/**
* Constructs a new instance of this class given the display
* to create it on 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><p>
* Note: Currently, null can be passed in for the display argument.
* This has the effect of creating the shell on the currently active
* display if there is one. If there is no current display, the
* shell is created on a "default" display. <b>Passing in null as
* the display argument is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param display the display to create the shell on
* @param style the style of control to construct
*
* @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#BORDER
* @see SWT#CLOSE
* @see SWT#MIN
* @see SWT#MAX
* @see SWT#RESIZE
* @see SWT#TITLE
* @see SWT#NO_TRIM
* @see SWT#SHELL_TRIM
* @see SWT#DIALOG_TRIM
* @see SWT#MODELESS
* @see SWT#PRIMARY_MODAL
* @see SWT#APPLICATION_MODAL
* @see SWT#SYSTEM_MODAL
*/
public Shell (Display display, int style) {
this (display, null, style, null);
}
/**
* <p>
* <b>IMPORTANT:</b> This constructor is <em>not</em> part of the SWT
* public API. It should never be referenced from application code.
* </p>
*/
protected Shell (Display display, Shell parent, int style, Object packageProxy) {
super ();
checkSubclass ();
setPackageProxy(packageProxy);
if (display == null) display = Display.getCurrent ();
if (display == null) display = Display.getDefault ();
if (!display.isValidThread ()) {
error (SWT.ERROR_THREAD_INVALID_ACCESS);
}
if (parent != null && parent.isDisposed ()) {
error (SWT.ERROR_INVALID_ARGUMENT);
}
this.style = checkStyle (style, parent);
this.parent = parent;
this.display = display;
createWidget (0);
}
/**
* Constructs a new instance of this class given only its
* parent. It is created with style <code>SWT.DIALOG_TRIM</code>.
* <p>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the shell on the currently active
* display if there is one. If there is no current display, the
* shell is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param parent a shell which will be the parent of the new instance
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</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>
*/
public Shell (Shell parent) {
this (parent, SWT.DIALOG_TRIM);
}
/**
* 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><p>
* Note: Currently, null can be passed in for the parent.
* This has the effect of creating the shell on the currently active
* display if there is one. If there is no current display, the
* shell is created on a "default" display. <b>Passing in null as
* the parent is not considered to be good coding style,
* and may not be supported in a future release of SWT.</b>
* </p>
*
* @param parent a shell which will be the parent of the new instance
* @param style the style of control to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_ARGUMENT - if the parent is disposed</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#BORDER
* @see SWT#CLOSE
* @see SWT#MIN
* @see SWT#MAX
* @see SWT#RESIZE
* @see SWT#TITLE
* @see SWT#NO_TRIM
* @see SWT#SHELL_TRIM
* @see SWT#DIALOG_TRIM
* @see SWT#ON_TOP
* @see SWT#MODELESS
* @see SWT#PRIMARY_MODAL
* @see SWT#APPLICATION_MODAL
* @see SWT#SYSTEM_MODAL
*/
public Shell (Shell parent, int style) {
this (parent != null ? parent.display : null, parent, style, null);
}
final static int checkStyle (int style, Composite parent) {
style = Decorations.checkStyle (style, parent);
style &= ~SWT.TRANSPARENT;
if(OS.windowServer == OS.WS_SYMBIAN_S60) {
// Set the RESIZE flag to prevent fixing the size so that the
// always-maximized top-level Shell will be automatically resized
// when available space changes.
if (parent == null) {
style |= SWT.RESIZE;
}
}
int mask = SWT.SYSTEM_MODAL | SWT.APPLICATION_MODAL | SWT.PRIMARY_MODAL;
int bits = style & ~mask;
if ((style & SWT.SYSTEM_MODAL) != 0) return bits | SWT.SYSTEM_MODAL;
if ((style & SWT.APPLICATION_MODAL) != 0) return bits | SWT.APPLICATION_MODAL;
if ((style & SWT.PRIMARY_MODAL) != 0) return bits | SWT.PRIMARY_MODAL;
return bits;
}
/**
* Adds the listener to the collection of listeners who will
* be notified when operations are performed on the receiver,
* by sending the listener one of the messages defined in the
* <code>ShellListener</code> interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener 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>
*
* @see ShellListener
* @see #removeShellListener
*/
public void addShellListener (ShellListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Close,typedListener);
addListener (SWT.Iconify,typedListener);
addListener (SWT.Deiconify,typedListener);
addListener (SWT.Activate, typedListener);
addListener (SWT.Deactivate, typedListener);
}
void checkNoBackground() {
if((style & SWT.NO_BACKGROUND) != 0) {
if(handle != 0) {
OS.QWidget_setAttribute(handle, OS.QT_WA_NOSYSTEMBACKGROUND, true);
}
if(scrollAreaHandle != 0) {
OS.QWidget_setAttribute(scrollAreaHandle, OS.QT_WA_NOSYSTEMBACKGROUND, true);
}
if(topHandle != 0) {
OS.QWidget_setAttribute(topHandle, OS.QT_WA_NOSYSTEMBACKGROUND, true);
}
}
}
/**
* Requests that the window manager close the receiver in
* the same way it would be closed when the user clicks on
* the "close box" or performs some other platform specific
* key or mouse combination that indicates the window
* should be removed.
*
* @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>
*
* @see SWT#Close
* @see #dispose
*/
public void close () {
checkWidget ();
closeWidget ();
}
public Point computeSize (int wHint, int hHint, boolean changed) {
// On Symbian the top-level Shells are always maximized.
// They have no trim. No need to compute anything. Just return the size.
if(OS.windowServer == OS.WS_SYMBIAN_S60 && parent == null) {
return OS.QWidget_size(topHandle);
}
Point size = super.computeSize(wHint, hHint, changed);
if(OS.windowServer == OS.WS_X11) {
if((style & SWT.RESIZE) != 0) {
// Resizeable windows won't go smaller than this
if(size.x < 81) size.x = 81;
if(size.y < 100) size.y = 100;
} else if(willBeDecorated()) {
// Windows won't go smaller than their trim
size.x = Math.max(size.x, windowFrameTrim() * 2);
size.y = Math.max(size.y, windowFrameTrim() * 2);
}
}
return size;
}
/*
* On non-Symbian platform the Shell size is initially set to some nice
* looking default. On Symbian platform Qt implements automatic resizing for
* maximized widgets. Thus, top-level Shells are always maximized and it's
* prevented from the application to set their size freely.
*/
Point setInitialSize () {
Rectangle area = display.getClientArea();
if(OS.windowServer != OS.WS_SYMBIAN_S60) {
area.width /= 3;
area.height /= 3;
}
Point size = computeSize(area.width, area.height, true);
size.x -= windowFrameTrim() * 2;
size.y -= windowTitleTrim() + windowFrameTrim();
// These values will be returned if the size is queried before the Shell
// is made visible (and they are not set again).
OS.QWidget_resize(topHandle, size.x, size.y);
if(OS.windowServer == OS.WS_SYMBIAN_S60 && parent == null) {
setRestoreState(OS.QT_WINDOWMAXIMIZED, false);
}
return size;
}
public Rectangle computeTrim (int x, int y, int width, int height) {
checkWidget();
Rectangle scrollableTrim = super.computeTrim (x, y, width, height);
// Normally window frame is learned on setVisible(true). If it has not been
// called then try to learn the window trim dimensions here.
learnTrim();
int leftTrim, rightTrim, topTrim, bottomTrim;
leftTrim = rightTrim = bottomTrim = windowFrameTrim();
topTrim = windowTitleTrim();
scrollableTrim.x -= leftTrim;
scrollableTrim.width += (leftTrim + rightTrim);
scrollableTrim.y -= topTrim;
scrollableTrim.height += (topTrim + bottomTrim);
return scrollableTrim;
}
boolean bypassWindowManager() {
return ((style & SWT.ON_TOP) != 0) && ((style & SWT.NO_FOCUS) != 0)
&& ((style & SWT.NO_TRIM) != 0);
}
final int windowFlagsFromStyle() {
// Bypassing window manager won't work with dialog-flag. If that is desired
// then window-flag is used.
int flags = (parent == null || bypassWindowManager() ? OS.QT_WINDOWFLAGS_WINDOW
: OS.QT_WINDOWFLAGS_DIALOG);
flags |= OS.QT_WINDOWFLAGS_CUSTOMIZEWINDOWHINT;
if((style & SWT.CLOSE) != 0) flags |= OS.QT_WINDOWFLAGS_WINDOWSYSTEMMENUHINT |
OS.QT_WINDOWFLAGS_WINDOWCLOSEBUTTONHINT;
if((style & SWT.MIN) != 0) flags |= OS.QT_WINDOWFLAGS_WINDOWMINIMIZEBUTTONHINT;
if((style & SWT.MAX) != 0) flags |= OS.QT_WINDOWFLAGS_WINDOWMAXIMIZEBUTTONHINT;
if((style & SWT.NO_TRIM) != 0) flags |= OS.QT_WINDOWFLAGS_FRAMELESSWINDOWHINT;
if((style & SWT.TITLE) != 0) flags |= OS.QT_WINDOWFLAGS_WINDOWTITLEHINT;
if((style & SWT.ON_TOP) != 0) flags |= OS.QT_WINDOWFLAGS_WINDOWSTAYSONTOPHINT;
// Don't use tooltip flag on Symbian, it causes nothing to be focusable.
if(OS.windowServer != OS.WS_SYMBIAN_S60 && bypassWindowManager()) {
flags |= OS.QT_WINDOWFLAGS_TOOLTIP;
}
return flags;
}
void createHandle_pp (int index) {
if(parent == null) {
// Top-level Shell
topHandle = mainWindowHandle = OS.QMainWindow_new(0, windowFlagsFromStyle());
frameHandle = scrollAreaHandle = OS.QScrollArea_new(mainWindowHandle);
handle = OS.QAbstractScrollArea_viewPort(scrollAreaHandle);
// Scrollarea is the central widget of the QMainWindow. This
// connects it to the main window's layout.
// At least on X11 this call has a side effect that mainWindow can't
// be made very small anymore. The minimumSize still returns (0,0)
// though.
OS.QMainWindow_setCentralWidget(mainWindowHandle, scrollAreaHandle);
} else {
// Dialog Shell
topHandle = dialogWindowHandle = OS.QDialog_new(parent.handle, windowFlagsFromStyle());
frameHandle = scrollAreaHandle = OS.QScrollArea_new(dialogWindowHandle);
handle = OS.QAbstractScrollArea_viewPort(scrollAreaHandle);
// A QLayout is needed where menubar can be inserted.
// Dialog window takes ownership of the layout instance.
int layoutHandle = OS.QVBoxLayout_new(dialogWindowHandle);
OS.QLayout_addWidget(layoutHandle, scrollAreaHandle);
OS.QLayout_setContentsMargins(layoutHandle, 0, 0, 0, 0);
}
// To make getClientArea return correct location already before
// setVisible(true) move it to it's final position here.
OS.QWidget_move(handle, 0, 0);
// If no size is set Qt returns completely weird "pre-initial" values before
// the Shell is made visible.
Point size = setInitialSize();
defBounds = OS.QWidget_rect(topHandle);
// Set size constraints. See QLayout::SizeConstraint.
if((style & SWT.RESIZE) == 0) {
// Setting min/max sizes to the same value disables the resize handle in the
// window corner. There's no window style for this purpose.
OS.QWidget_setFixedSize(topHandle, size.x, size.y);
} else {
// If no-one has set size constraints then Qt will apply a default
// constraint. Prevent this or the Shell won't go very small.
int layoutHandle = OS.QWidget_layout(topHandle);
if(layoutHandle != 0) {
if(OS.QLayout_sizeConstraint(layoutHandle) == OS.QLAYOUT_SIZECONSTRAINT_SETDEFAULTCONSTRAINT)
OS.QLayout_setSizeConstraint(layoutHandle, OS.QLAYOUT_SIZECONSTRAINT_SETNOCONSTRAINT);
}
}
// Shell must not by default accept focus by clicking.
int policy = OS.QWidget_focusPolicy(topHandle) & ~OS.QT_FOCUSPOLICY_CLICKFOCUS;
OS.QWidget_setFocusPolicy(topHandle, policy);
policy = OS.QWidget_focusPolicy(scrollAreaHandle) & ~OS.QT_FOCUSPOLICY_CLICKFOCUS;
OS.QWidget_setFocusPolicy(scrollAreaHandle, policy);
policy = OS.QWidget_focusPolicy(handle) & ~OS.QT_FOCUSPOLICY_CLICKFOCUS;
OS.QWidget_setFocusPolicy(handle, policy);
// The Shell should not become active when Shell.setVisible(true) is called.
OS.QWidget_setAttribute(topHandle, OS.QT_WA_SHOWWITHOUTACTIVATING, true);
// Stand-alone Composites, Shells, Canvases set the CANVAS flag
state |= WidgetState.HANDLE | WidgetState.CANVAS;
}
Composite findDeferredControl () {
return layoutCount > 0 ? this : null;
}
public boolean isEnabled () {
checkWidget ();
return getEnabled ();
}
boolean isParentMirrored() {
// Shells are positioned in Display coordinate system which is always LTR.
return false;
}
public boolean isVisible () {
checkWidget();
return getVisible ();
}
void register_pp () {
// Viewport & scroll area
super.register_pp ();
// Main window, if top-level
if(mainWindowHandle != 0) Display.addWidget (mainWindowHandle, this);
// Dialog window, if a dialog Shell
if(dialogWindowHandle != 0) Display.addWidget (dialogWindowHandle, this);
}
void releaseParent_pp () {
/* Do nothing */
}
/**
* Returns the receiver's alpha value. The alpha value
* is between 0 (transparent) and 255 (opaque).
*
* @return the alpha value
*
* @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 3.4
*/
public int getAlpha () {
checkWidget ();
double opacity = OS.QWidget_windowOpacity(topHandle);
return (int)(255*opacity);
}
public boolean getMaximized () {
checkWidget();
return !hasState(OS.QT_WINDOWFULLSCREEN) && super.getMaximized ();
}
/**
* Returns the receiver's input method editor mode. This
* will be the result of bitwise OR'ing together one or
* more of the following constants defined in class
* <code>SWT</code>:
* <code>NONE</code>, <code>ROMAN</code>, <code>DBCS</code>,
* <code>PHONETIC</code>, <code>NATIVE</code>, <code>ALPHA</code>.
*
* @return the IME mode
*
* @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>
*
* @see SWT
*/
public int getImeInputMode () {
checkWidget();
return SWT.NONE;
}
Shell _getShell () {
return this;
}
/**
* Returns an array containing all shells which are
* descendants of the receiver.
* <p>
* @return the dialog shells
*
* @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 Shell [] getShells () {
checkWidget();
int count = 0;
Shell [] shells = display.getShells ();
for (int i=0; i<shells.length; i++) {
Control shell = shells [i];
do {
shell = shell.getParent ();
} while (shell != null && shell != this);
if (shell == this) count++;
}
int index = 0;
Shell [] result = new Shell [count];
for (int i=0; i<shells.length; i++) {
Control shell = shells [i];
do {
shell = shell.getParent ();
} while (shell != null && shell != this);
if (shell == this) {
result [index++] = shells [i];
}
}
return result;
}
/**
* Moves the receiver to the top of the drawing order for
* the display on which it was created (so that all other
* shells on that display, which are not the receiver's
* children will be drawn behind it), marks it visible,
* sets the focus and asks the window manager to make the
* shell active.
*
* @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>
*
* @see Control#moveAbove
* @see Control#setFocus
* @see Control#setVisible
* @see Display#getActiveShell
* @see Decorations#setDefaultButton(Button)
* @see Shell#setActive
* @see Shell#forceActive
*/
public void open () {
checkWidget ();
setVisible (true);
bringToTop (false);
if (isDisposed ()) return;
if (!restoreFocus () && !traverseGroup (true)) setFocus (OS.QT_OTHERFOCUSREASON);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when operations are performed on the receiver.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener 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>
*
* @see ShellListener
* @see #addShellListener
*/
public void removeShellListener (ShellListener listener) {
checkWidget();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Close, listener);
eventTable.unhook (SWT.Iconify,listener);
eventTable.unhook (SWT.Deiconify,listener);
eventTable.unhook (SWT.Activate, listener);
eventTable.unhook (SWT.Deactivate, listener);
}
/**
* If the receiver is visible, moves it to the top of the
* drawing order for the display on which it was created
* (so that all other shells on that display, which are not
* the receiver's children will be drawn behind it) and asks
* the window manager to make the shell active
*
* @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
* @see Control#moveAbove
* @see Control#setFocus
* @see Control#setVisible
* @see Display#getActiveShell
* @see Decorations#setDefaultButton(Button)
* @see Shell#open
* @see Shell#setActive
*/
public void setActive () {
checkWidget ();
bringToTop (false);
// Wait for active window to change unless the widget isn't visible.
// Then setActive won't do anything.
if(OS.windowServer == OS.WS_X11 && OS.QWidget_isVisible(topHandle)) {
waitXRequestComplete();
}
}
/**
* Sets the receiver's alpha value which must be
* between 0 (transparent) and 255 (opaque).
* <p>
* This operation requires the operating system's advanced
* widgets subsystem which may not be available on some
* platforms.
* </p>
* @param alpha the alpha value
*
* @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 3.4
*/
public void setAlpha (int alpha) {
checkWidget ();
if(alpha < 0 || alpha > 255) return;
OS.QWidget_setWindowOpacity(topHandle, ((double)alpha)/255);
}
public Point getSize() {
checkWidget();
Point size = OS.QWidget_size(topHandle);
size.x += windowFrameTrim() * 2;
size.y += windowFrameTrim() + windowTitleTrim();
return size;
}
public Rectangle getBounds() {
checkWidget();
Rectangle bounds = OS.QWidget_geometry(topHandle);
bounds.x -= windowFrameTrim();
bounds.y -= windowTitleTrim();
bounds.width += windowFrameTrim() * 2;
bounds.height += windowFrameTrim() + windowTitleTrim();
return bounds;
}
int setBounds (int x, int y, int width, int height, boolean move, boolean resize) {
// On Symbian platform top-level Shells are forced to maximized
if(OS.windowServer == OS.WS_SYMBIAN_S60 && parent == null) {
//for updating the layout when shell.pack is called after shell open.
// or aligning with other platform which has resizable top shell
if(resize) {
Point newSize = new Point(width, height);
if(oldSize == null || !oldSize.equals(newSize)) {
sendEvent(SWT.Resize);
// Activate layout
if (layout != null) {
markLayout (false, false);
updateLayout (false);
}
oldSize = newSize;
}
}
return 0;
}
if (hasState(OS.QT_WINDOWFULLSCREEN)) {
setRestoreState(OS.QT_WINDOWFULLSCREEN, true);
}
Rectangle geometry = OS.QWidget_geometry(topHandle);
int result = 0;
if(move) {
int oldX = geometry.x - windowFrameTrim();
int oldY = geometry.y - windowTitleTrim();
if(oldX != x || oldY != y) {
result |= WidgetState.MOVED;
}
}
if(resize) {
int oldW = geometry.width + windowFrameTrim() * 2;
int oldH = geometry.height + windowTitleTrim() + windowFrameTrim();
if(oldW != width || oldH != height) {
result |= WidgetState.RESIZED;
}
}
if((result & WidgetState.MOVED) != 0) {
int newX = x + windowFrameTrim();
int newY = y + windowTitleTrim();
OS.QWidget_setGeometry(topHandle, newX, newY, geometry.width, geometry.height);
}
if((result & WidgetState.RESIZED) != 0) {
int newW = width - windowFrameTrim() * 2;
int newH = height - (windowFrameTrim() + windowTitleTrim());
// If size has been fixed it needs to be temporarily unfixed
if((style & SWT.RESIZE) == 0) unlockSize();
OS.QWidget_resize(topHandle, newW, newH);
// Fix the new size if not resizeable
if((style & SWT.RESIZE) == 0) {
OS.QWidget_setFixedSize(topHandle, Math.max(0, newW),
Math.max(0, newH));
}
}
return result;
}
public Point getLocation() {
checkWidget();
Rectangle geometry = OS.QWidget_geometry(topHandle);
Point pos = new Point(geometry.x, geometry.y);
pos.x -= windowFrameTrim();
pos.y -= windowTitleTrim();
return pos;
}
public void setEnabled (boolean enabled) {
checkWidget ();
if (((state & WidgetState.DISABLED) == 0) == enabled) return;
super.setEnabled (enabled);
if (enabled && topHandle == OS.QApplication_activeWindow()) {
if (!restoreFocus ()) traverseGroup (true);
}
}
void enableWidget(boolean enabled) {
Control oldFocus = Display._getFocusControl();
super.enableWidget(enabled);
if(!enabled) {
// All children were looped through and disabled by QWidget unless they
// were explicitly disabled. SWT behavior is not to disable the dialog
// Shells so we have to restore their states.
Shell shells[] = getShells();
for(int i = 0; i < shells.length; ++i) {
if(shells[i].parent == this) {
if(shells[i]._getEnabled()) {
OS.QWidget_setEnabled(shells[i].topHandle, true);
}
}
}
// Because dialog Shell might have been temporarily disabled the focus might
// have been lost and must be restored.
if(oldFocus != null) oldFocus.menuShell().restoreFocus();
}
}
/**
* Sets the input method editor mode to the argument which
* should be the result of bitwise OR'ing together one or more
* of the following constants defined in class <code>SWT</code>:
* <code>NONE</code>, <code>ROMAN</code>, <code>DBCS</code>,
* <code>PHONETIC</code>, <code>NATIVE</code>, <code>ALPHA</code>.
*
* @param mode the new IME mode
*
* @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>
*
* @see SWT
*/
public void setImeInputMode (int mode) {
checkWidget();
}
private final int modalityFromStyle() {
int modality = OS.QT_WINDOWMODALITY_NONMODAL;
if((style & SWT.SYSTEM_MODAL) != 0)
return OS.QT_WINDOWMODALITY_APPLICATIONMODAL;
if((style & SWT.APPLICATION_MODAL) != 0)
return OS.QT_WINDOWMODALITY_APPLICATIONMODAL;
if((style & SWT.PRIMARY_MODAL) != 0) {
return OS.QT_WINDOWMODALITY_APPLICATIONMODAL;
}
return modality;
}
public void setVisible (boolean visible) {
checkWidget();
int mask = SWT.PRIMARY_MODAL | SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL;
if ((style & mask) != 0) {
if (visible) {
Display.setModalShell (this);
if ((style & (SWT.APPLICATION_MODAL | SWT.SYSTEM_MODAL)) != 0) {
Display.setModalDialog (null);
}
Control control = Display._getFocusControl();
if (control != null && !control.isActive()) {
bringToTop(false);
if (isDisposed()) return;
}
OS.QWidget_setWindowModality(topHandle, modalityFromStyle());
int mouseGrabber = OS.QWidget_mouseGrabber();
if(mouseGrabber != 0) {
OS.QWidget_releaseMouse(mouseGrabber);
}
} else {
display.clearModal (this);
}
} else {
updateModal ();
}
// This shell
try {
if (visible) {
suppressResizeEvent = true;
}
super.setVisible(visible);
} finally {
suppressResizeEvent = false;
}
if(isDisposed()) return;
// Dialog shells.
// SWT behavior is that when a Shell gets setVisible(false) then dialog Shells
// after that have getVisible == isVisible == false.
Shell dialogShells[] = getShells();
for(int i = 0; i < dialogShells.length; ++i) {
Shell child = dialogShells[i];
if(child.isVisible() != visible) {
child.setVisible(visible);
if(isDisposed()) return;
}
}
// Ensure that the state is updated
if(OS.windowServer == OS.WS_X11) {
waitXRequestComplete();
}
if(isDisposed()) return;
learnTrim();
}
boolean traverseEscape () {
if (parent == null) return false;
if (!isVisible () || !isEnabled ()) return false;
close ();
return true;
}
void updateModal () {
// Nothing to do, the method is here so that modality logic can be similar
// across the platforms
}
void deregister_pp () {
super.deregister_pp ();
if(mainWindowHandle != 0) {
Display.removeWidget(mainWindowHandle);
}
if(dialogWindowHandle != 0) {
Display.removeWidget(dialogWindowHandle);
}
}
/**
* If the receiver is visible, moves it to the top of the
* drawing order for the display on which it was created
* (so that all other shells on that display, which are not
* the receiver's children will be drawn behind it) and forces
* the window manager to make the shell active.
*
* @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
* @see Control#moveAbove
* @see Control#setFocus
* @see Control#setVisible
* @see Display#getActiveShell
* @see Decorations#setDefaultButton(Button)
* @see Shell#open
* @see Shell#setActive
*/
public void forceActive () {
checkWidget ();
bringToTop (true);
}
public void moveAbove (Control control) {
if(parent == null) {
// There's no way to move windows above other windows in Qt.
// Therefore here it's raised to the top despite of the control
// parameter.
// Also this sends the window on top of ALL windows including the
// windows of other applications.
OS.QWidget_raise(topHandle);
} else {
super.moveAbove(control);
}
}
public void moveBelow (Control control) {
if(parent == null) {
// There's no way to move windows below other windows in Qt.
// Therefore here it's lowered to the bottom despite of the control
// parameter.
// Also this sends the window below ALL the windows including the
// windows of other applications.
OS.QWidget_lower(topHandle);
} else {
super.moveBelow(control);
}
}
void releaseHandle_pp () {
mainWindowHandle = 0;
dialogWindowHandle = 0;
super.releaseHandle_pp ();
}
void releaseChildren_pp (boolean destroy) {
Shell [] shells = getShells ();
for (int i=0; i<shells.length; i++) {
Shell shell = shells [i];
if (shell != null && !shell.isDisposed ()) {
shell.release(true);
}
}
super.releaseChildren_pp (destroy);
}
void releaseWidget_pp () {
super.releaseWidget_pp ();
display.clearModal (this);
if(windowSurface != null) {
windowSurface.dispose();
windowSurface = null;
}
}
boolean qt_event_keypress_pp(int widgetHandle, int key,
int modifier, int character, int nativeScanCode) {
super.qt_event_keypress_pp(widgetHandle, key, modifier, character, nativeScanCode);
// Key event is canceled to prevent propagation from viewport to its parent
return true;
}
boolean qt_event_keyrelease_pp( int widgetHandle, int key, int modifier, int character, int nativeScanCode )
{
super.qt_event_keyrelease_pp(widgetHandle, key, modifier, character, nativeScanCode);
// Key event is canceled to prevent propagation from viewport to its parent
return true;
}
void qt_swt_event_symbianWindowHide() {
notifySymbianWindowVisibilityChange(false);
}
void qt_swt_event_symbianWindowShow() {
notifySymbianWindowVisibilityChange(true);
}
public Rectangle internal_getDefaultBounds() {
return defBounds;
}
void qt_swt_event_widgetResized_pp(int widgetHandle, int oldWidth, int oldHeight, int width, int height, boolean sendResizeEvent) {
super.qt_swt_event_widgetResized_pp(widgetHandle, oldWidth, oldHeight, width, height, !suppressResizeEvent);
}
WindowSurface getWindowSurface() {
checkWidget();
// Only top level shells have window surface
if (parent != null) {
return null;
}
if(windowSurface == null) {
windowSurface = new WindowSurface(this, true);
}
return windowSurface;
}
void addSymbianWindowVisibilityListener_pp(SymbianWindowVisibilityListener listener) {
if (!winVisibilityListeners.contains(listener))
winVisibilityListeners.addElement(listener);
}
void removeSymbianWindowVisibilityListener_pp(SymbianWindowVisibilityListener listener) {
if (winVisibilityListeners.contains(listener))
winVisibilityListeners.removeElement(listener);
}
void notifySymbianWindowVisibilityChange(boolean visible) {
int count = winVisibilityListeners.size();
for (int i = 0; i < count; i++) {
SymbianWindowVisibilityListener listener = (SymbianWindowVisibilityListener)(winVisibilityListeners.elementAt(i));
listener.handleSymbianWindowVisibilityChange(this, visible);
}
}
}