| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.graphics; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.motif.*; |
| |
| /** |
| * This class is the abstract superclass of all device objects, |
| * such as the Display device and the Printer device. Devices |
| * can have a graphics context (GC) created for them, and they |
| * can be drawn on by sending messages to the associated GC. |
| */ |
| public abstract class Device implements Drawable { |
| /** |
| * the handle to the X Display |
| * (Warning: This field is platform dependent) |
| */ |
| public int xDisplay; |
| |
| /** |
| * whether the XLFD resolution should match the |
| * resolution of the device when fonts are created |
| * (Warning: This field is platform dependent) |
| */ |
| // TEMPORARY CODE |
| public boolean setDPI; |
| |
| /* Debugging */ |
| public static boolean DEBUG; |
| boolean debug = DEBUG; |
| boolean tracking = DEBUG; |
| Error [] errors; |
| Object [] objects; |
| |
| /* Arguments for XtOpenDisplay */ |
| String display_name; |
| String application_name; |
| String application_class; |
| |
| /* Colormap and reference count for this display */ |
| XColor [] xcolors; |
| int [] colorRefCount; |
| |
| /* System Colors */ |
| Color COLOR_BLACK, COLOR_DARK_RED, COLOR_DARK_GREEN, COLOR_DARK_YELLOW, COLOR_DARK_BLUE; |
| Color COLOR_DARK_MAGENTA, COLOR_DARK_CYAN, COLOR_GRAY, COLOR_DARK_GRAY, COLOR_RED; |
| Color COLOR_GREEN, COLOR_YELLOW, COLOR_BLUE, COLOR_MAGENTA, COLOR_CYAN, COLOR_WHITE; |
| |
| /* System Font */ |
| Font systemFont; |
| |
| /* Parsing Tables */ |
| int tabPointer, crPointer; |
| /** |
| * parse table mappings for tab and cr |
| * (Warning: This field is platform dependent) |
| */ |
| // TEMPORARY CODE |
| public int tabMapping, crMapping; |
| |
| /* Xt Warning and Error Handlers */ |
| boolean warnings = true; |
| Callback xtWarningCallback, xtErrorCallback; |
| int xtWarningProc, xtErrorProc, xtNullWarningProc, xtNullErrorProc; |
| |
| /* X Warning and Error Handlers */ |
| static Callback XErrorCallback, XIOErrorCallback; |
| static int XErrorProc, XIOErrorProc, XNullErrorProc, XNullIOErrorProc; |
| static Device[] Devices = new Device[4]; |
| |
| /* Initialize X and Xt */ |
| static { |
| /* |
| * This code is intentionally commented. |
| */ |
| // OS.XInitThreads (); |
| // OS.XtToolkitThreadInitialize (); |
| OS.XtToolkitInitialize (); |
| } |
| |
| /* |
| * TEMPORARY CODE. When a graphics object is |
| * created and the device parameter is null, |
| * the current Display is used. This presents |
| * a problem because SWT graphics does not |
| * reference classes in SWT widgets. The correct |
| * fix is to remove this feature. Unfortunately, |
| * too many application programs rely on this |
| * feature. |
| * |
| * This code will be removed in the future. |
| */ |
| protected static Device CurrentDevice; |
| protected static Runnable DeviceFinder; |
| static { |
| try { |
| Class.forName ("org.eclipse.swt.widgets.Display"); |
| } catch (Throwable e) {} |
| } |
| |
| /* |
| * TEMPORARY CODE |
| */ |
| static Device getDevice () { |
| if (DeviceFinder != null) DeviceFinder.run(); |
| Device device = CurrentDevice; |
| CurrentDevice = null; |
| return device; |
| } |
| |
| /** |
| * Constructs a new instance of this class. |
| * <p> |
| * You must dispose the device when it is no longer required. |
| * </p> |
| * |
| * @param data the DeviceData which describes the receiver |
| * |
| * @see #create |
| * @see #init |
| * @see DeviceData |
| */ |
| public Device(DeviceData data) { |
| if (data != null) { |
| display_name = data.display_name; |
| application_name = data.application_name; |
| application_class = data.application_class; |
| tracking = data.tracking; |
| debug = data.debug; |
| } |
| if (tracking) { |
| errors = new Error [128]; |
| objects = new Object [128]; |
| } |
| create (data); |
| init (); |
| register (this); |
| |
| /* Initialize the system font slot */ |
| systemFont = getSystemFont (); |
| } |
| |
| /** |
| * Throws an <code>SWTException</code> if the receiver can not |
| * be accessed by the caller. This may include both checks on |
| * the state of the receiver and more generally on the entire |
| * execution context. This method <em>should</em> be called by |
| * device implementors to enforce the standard SWT invariants. |
| * <p> |
| * Currently, it is an error to invoke any method (other than |
| * <code>isDisposed()</code> and <code>dispose()</code>) on a |
| * device that has had its <code>dispose()</code> method called. |
| * </p><p> |
| * In future releases of SWT, there may be more or fewer error |
| * checks and exceptions may be thrown for different reasons. |
| * <p> |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| protected void checkDevice () { |
| if (xDisplay == 0) SWT.error (SWT.ERROR_DEVICE_DISPOSED); |
| } |
| |
| /** |
| * Creates the device in the operating system. If the device |
| * does not have a handle, this method may do nothing depending |
| * on the device. |
| * <p> |
| * This method is called before <code>init</code>. |
| * </p><p> |
| * Subclasses are supposed to reimplement this method and not |
| * call the <code>super</code> implementation. |
| * </p> |
| * |
| * @param data the DeviceData which describes the receiver |
| * |
| * @see #init |
| */ |
| protected void create (DeviceData data) { |
| } |
| |
| synchronized static void deregister (Device device) { |
| for (int i=0; i<Devices.length; i++) { |
| if (device == Devices [i]) Devices [i] = null; |
| } |
| } |
| |
| /** |
| * Destroys the device in the operating system and releases |
| * the device's handle. If the device does not have a handle, |
| * this method may do nothing depending on the device. |
| * <p> |
| * This method is called after <code>release</code>. |
| * </p><p> |
| * Subclasses are supposed to reimplement this method and not |
| * call the <code>super</code> implementation. |
| * </p> |
| * |
| * @see #dispose |
| * @see #release |
| */ |
| protected void destroy () { |
| } |
| |
| /** |
| * Disposes of the operating system resources associated with |
| * the receiver. After this method has been invoked, the receiver |
| * will answer <code>true</code> when sent the message |
| * <code>isDisposed()</code>. |
| * |
| * @see #release |
| * @see #destroy |
| * @see #checkDevice |
| */ |
| public void dispose () { |
| if (isDisposed()) return; |
| checkDevice (); |
| release (); |
| destroy (); |
| deregister (this); |
| xDisplay = 0; |
| if (tracking) { |
| objects = null; |
| errors = null; |
| } |
| } |
| |
| void dispose_Object (Object object) { |
| for (int i=0; i<objects.length; i++) { |
| if (objects [i] == object) { |
| objects [i] = null; |
| errors [i] = null; |
| return; |
| } |
| } |
| } |
| |
| static synchronized Device findDevice (int xDisplay) { |
| for (int i=0; i<Devices.length; i++) { |
| Device device = Devices [i]; |
| if (device != null && device.xDisplay == xDisplay) { |
| return device; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Returns a rectangle describing the receiver's size and location. |
| * |
| * @return the bounding rectangle |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Rectangle getBounds () { |
| checkDevice (); |
| int screen = OS.XDefaultScreen (xDisplay); |
| int width = OS.XDisplayWidth (xDisplay, screen); |
| int height = OS.XDisplayHeight (xDisplay, screen); |
| return new Rectangle (0, 0, width, height); |
| } |
| |
| /** |
| * Returns a rectangle which describes the area of the |
| * receiver which is capable of displaying data. |
| * |
| * @return the client area |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see #getBounds |
| */ |
| public Rectangle getClientArea () { |
| return getBounds (); |
| } |
| |
| /** |
| * Returns the bit depth of the screen, which is the number of |
| * bits it takes to represent the number of unique colors that |
| * the screen is currently capable of displaying. This number |
| * will typically be one of 1, 8, 15, 16, 24 or 32. |
| * |
| * @return the depth of the screen |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public int getDepth () { |
| checkDevice (); |
| int xScreenPtr = OS.XDefaultScreenOfDisplay (xDisplay); |
| return OS.XDefaultDepthOfScreen (xScreenPtr); |
| } |
| |
| /** |
| * Returns a <code>DeviceData</code> based on the receiver. |
| * Modifications made to this <code>DeviceData</code> will not |
| * affect the receiver. |
| * |
| * @return a <code>DeviceData</code> containing the device's data and attributes |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see DeviceData |
| */ |
| public DeviceData getDeviceData () { |
| checkDevice (); |
| DeviceData data = new DeviceData (); |
| data.display_name = display_name; |
| data.application_name = application_name; |
| data.application_class = application_class; |
| data.debug = debug; |
| data.tracking = tracking; |
| int count = 0, length = 0; |
| if (tracking) length = objects.length; |
| for (int i=0; i<length; i++) { |
| if (objects [i] != null) count++; |
| } |
| int index = 0; |
| data.objects = new Object [count]; |
| data.errors = new Error [count]; |
| for (int i=0; i<length; i++) { |
| if (objects [i] != null) { |
| data.objects [index] = objects [i]; |
| data.errors [index] = errors [i]; |
| index++; |
| } |
| } |
| return data; |
| } |
| |
| /** |
| * Returns a point whose x coordinate is the horizontal |
| * dots per inch of the display, and whose y coordinate |
| * is the vertical dots per inch of the display. |
| * |
| * @return the horizontal and vertical DPI |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Point getDPI () { |
| checkDevice (); |
| int xScreenNum = OS.XDefaultScreen (xDisplay); |
| int width = OS.XDisplayWidth (xDisplay, xScreenNum); |
| int height = OS.XDisplayHeight (xDisplay, xScreenNum); |
| int mmX = OS.XDisplayWidthMM (xDisplay, xScreenNum); |
| int mmY = OS.XDisplayHeightMM (xDisplay, xScreenNum); |
| /* 0.03937 mm/inch */ |
| double inchesX = mmX * 0.03937; |
| double inchesY = mmY * 0.03937; |
| int x = (int)((width / inchesX) + 0.5); |
| int y = (int)((height / inchesY) + 0.5); |
| return new Point (x, y); |
| } |
| |
| /** |
| * Returns <code>FontData</code> objects which describe |
| * the fonts that match the given arguments. If the |
| * <code>faceName</code> is null, all fonts will be returned. |
| * |
| * @param faceName the name of the font to look for, or null |
| * @param scalable if true only scalable fonts are returned, otherwise only non-scalable fonts are returned. |
| * @return the matching font data |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public FontData [] getFontList (String faceName, boolean scalable) { |
| checkDevice (); |
| String xlfd; |
| if (faceName == null) { |
| xlfd = "-*-*-*-*-*-*-*-*-*-*-*-*-*-*"; |
| } else { |
| int dashIndex = faceName.indexOf('-'); |
| if (dashIndex < 0) { |
| xlfd = "-*-" + faceName + "-*-*-*-*-*-*-*-*-*-*-*-*"; |
| } else { |
| xlfd = "-" + faceName + "-*-*-*-*-*-*-*-*-*-*-*-*"; |
| } |
| } |
| /* Use the character encoding for the default locale */ |
| byte [] buffer1 = Converter.wcsToMbcs (null, xlfd, true); |
| int [] ret = new int [1]; |
| int listPtr = OS.XListFonts (xDisplay, buffer1, 65535, ret); |
| int ptr = listPtr; |
| int [] intBuf = new int [1]; |
| FontData [] fd = new FontData [ret [0]]; |
| int fdIndex = 0; |
| for (int i = 0; i < ret [0]; i++) { |
| OS.memmove (intBuf, ptr, 4); |
| int charPtr = intBuf [0]; |
| int length = OS.strlen (charPtr); |
| byte [] buffer2 = new byte [length]; |
| OS.memmove (buffer2, charPtr, length); |
| /* Use the character encoding for the default locale */ |
| char [] chars = Converter.mbcsToWcs (null, buffer2); |
| FontData data = FontData.motif_new (new String (chars)); |
| boolean isScalable = data.averageWidth == 0 && data.pixels == 0 && data.points == 0; |
| if (isScalable == scalable) { |
| fd [fdIndex++] = data; |
| } |
| ptr += 4; |
| } |
| OS.XFreeFontNames (listPtr); |
| if (fdIndex == ret [0]) return fd; |
| FontData [] result = new FontData [fdIndex]; |
| System.arraycopy (fd, 0, result, 0, fdIndex); |
| return result; |
| } |
| |
| /** |
| * Returns the matching standard color for the given |
| * constant, which should be one of the color constants |
| * specified in class <code>SWT</code>. Any value other |
| * than one of the SWT color constants which is passed |
| * in will result in the color black. This color should |
| * not be free'd because it was allocated by the system, |
| * not the application. |
| * |
| * @param id the color constant |
| * @return the matching color |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| * |
| * @see SWT |
| */ |
| public Color getSystemColor (int id) { |
| checkDevice (); |
| XColor xColor = null; |
| switch (id) { |
| case SWT.COLOR_BLACK: return COLOR_BLACK; |
| case SWT.COLOR_DARK_RED: return COLOR_DARK_RED; |
| case SWT.COLOR_DARK_GREEN: return COLOR_DARK_GREEN; |
| case SWT.COLOR_DARK_YELLOW: return COLOR_DARK_YELLOW; |
| case SWT.COLOR_DARK_BLUE: return COLOR_DARK_BLUE; |
| case SWT.COLOR_DARK_MAGENTA: return COLOR_DARK_MAGENTA; |
| case SWT.COLOR_DARK_CYAN: return COLOR_DARK_CYAN; |
| case SWT.COLOR_GRAY: return COLOR_GRAY; |
| case SWT.COLOR_DARK_GRAY: return COLOR_DARK_GRAY; |
| case SWT.COLOR_RED: return COLOR_RED; |
| case SWT.COLOR_GREEN: return COLOR_GREEN; |
| case SWT.COLOR_YELLOW: return COLOR_YELLOW; |
| case SWT.COLOR_BLUE: return COLOR_BLUE; |
| case SWT.COLOR_MAGENTA: return COLOR_MAGENTA; |
| case SWT.COLOR_CYAN: return COLOR_CYAN; |
| case SWT.COLOR_WHITE: return COLOR_WHITE; |
| } |
| if (xColor == null) return COLOR_BLACK; |
| return Color.motif_new (this, xColor); |
| } |
| |
| /** |
| * Returns a reasonable font for applications to use. |
| * On some platforms, this will match the "default font" |
| * or "system font" if such can be found. This font |
| * should not be free'd because it was allocated by the |
| * system, not the application. |
| * <p> |
| * Typically, applications which want the default look |
| * should simply not set the font on the widgets they |
| * create. Widgets are always created with the correct |
| * default font for the class of user-interface component |
| * they represent. |
| * </p> |
| * |
| * @return a font |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public Font getSystemFont () { |
| checkDevice (); |
| return systemFont; |
| } |
| |
| /** |
| * Returns <code>true</code> if the underlying window system prints out |
| * warning messages on the console, and <code>setWarnings</code> |
| * had previously been called with <code>true</code>. |
| * |
| * @return <code>true</code>if warnings are being handled, and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public boolean getWarnings () { |
| checkDevice (); |
| return _getWarnings(); |
| } |
| |
| boolean _getWarnings () { |
| return warnings; |
| } |
| |
| /** |
| * Initializes any internal resources needed by the |
| * device. |
| * <p> |
| * This method is called after <code>create</code>. |
| * </p><p> |
| * If subclasses reimplement this method, they must |
| * call the <code>super</code> implementation. |
| * </p> |
| * |
| * @see #create |
| */ |
| protected void init () { |
| if (debug) OS.XSynchronize (xDisplay, true); |
| |
| /* Create the warning and error callbacks */ |
| Class clazz = getClass (); |
| synchronized (clazz) { |
| int index = 0; |
| while (index < Devices.length) { |
| if (Devices [index] != null) break; |
| index++; |
| } |
| if (index == Devices.length) { |
| XErrorCallback = new Callback (clazz, "XErrorProc", 2); |
| XNullErrorProc = XErrorCallback.getAddress (); |
| if (XNullErrorProc == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); |
| XIOErrorCallback = new Callback (clazz, "XIOErrorProc", 1); |
| XNullIOErrorProc = XIOErrorCallback.getAddress (); |
| if (XNullIOErrorProc == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); |
| XErrorProc = OS.XSetErrorHandler (XNullErrorProc); |
| XIOErrorProc = OS.XSetIOErrorHandler (XNullIOErrorProc); |
| } |
| } |
| xtWarningCallback = new Callback (this, "xtWarningProc", 1); |
| xtNullWarningProc = xtWarningCallback.getAddress (); |
| if (xtNullWarningProc == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); |
| xtErrorCallback = new Callback (this, "xtErrorProc", 1); |
| xtNullErrorProc = xtErrorCallback.getAddress (); |
| if (xtNullErrorProc == 0) SWT.error (SWT.ERROR_NO_MORE_CALLBACKS); |
| int xtContext = OS.XtDisplayToApplicationContext (xDisplay); |
| xtWarningProc = OS.XtAppSetWarningHandler (xtContext, xtNullWarningProc); |
| xtErrorProc = OS.XtAppSetErrorHandler (xtContext, xtNullErrorProc); |
| |
| /* Only use palettes for <= 8 bpp default visual */ |
| int xScreenPtr = OS.XDefaultScreenOfDisplay (xDisplay); |
| int defaultDepth = OS.XDefaultDepthOfScreen (xScreenPtr); |
| if (defaultDepth <= 8) { |
| int numColors = 1 << defaultDepth; |
| colorRefCount = new int [numColors]; |
| xcolors = new XColor [numColors]; |
| } |
| |
| /* |
| * The following colors are listed in the Windows |
| * Programmer's Reference as the colors in the default |
| * palette. |
| */ |
| COLOR_BLACK = new Color (this, 0,0,0); |
| COLOR_DARK_RED = new Color (this, 0x80,0,0); |
| COLOR_DARK_GREEN = new Color (this, 0,0x80,0); |
| COLOR_DARK_YELLOW = new Color (this, 0x80,0x80,0); |
| COLOR_DARK_BLUE = new Color (this, 0,0,0x80); |
| COLOR_DARK_MAGENTA = new Color (this, 0x80,0,0x80); |
| COLOR_DARK_CYAN = new Color (this, 0,0x80,0x80); |
| COLOR_GRAY = new Color (this, 0xC0,0xC0,0xC0); |
| COLOR_DARK_GRAY = new Color (this, 0x80,0x80,0x80); |
| COLOR_RED = new Color (this, 0xFF,0,0); |
| COLOR_GREEN = new Color (this, 0,0xFF,0); |
| COLOR_YELLOW = new Color (this, 0xFF,0xFF,0); |
| COLOR_BLUE = new Color (this, 0,0,0xFF); |
| COLOR_MAGENTA = new Color (this, 0xFF,0,0xFF); |
| COLOR_CYAN = new Color (this, 0,0xFF,0xFF); |
| COLOR_WHITE = new Color (this, 0xFF,0xFF,0xFF); |
| |
| /* Create the parsing tables */ |
| byte[] tabBuffer = {(byte) '\t', 0}; |
| tabPointer = OS.XtMalloc (tabBuffer.length); |
| OS.memmove (tabPointer, tabBuffer, tabBuffer.length); |
| int tabString = OS.XmStringComponentCreate(OS.XmSTRING_COMPONENT_TAB, 0, null); |
| int [] argList = { |
| OS.XmNpattern, tabPointer, |
| OS.XmNsubstitute, tabString, |
| }; |
| tabMapping = OS.XmParseMappingCreate(argList, argList.length / 2); |
| OS.XmStringFree(tabString); |
| byte[] crBuffer = {(byte) '\n', 0}; |
| crPointer = OS.XtMalloc (crBuffer.length); |
| OS.memmove (crPointer, crBuffer, crBuffer.length); |
| int crString = OS.XmStringComponentCreate(OS.XmSTRING_COMPONENT_SEPARATOR, 0, null); |
| argList = new int[] { |
| OS.XmNpattern, crPointer, |
| OS.XmNsubstitute, crString, |
| }; |
| crMapping = OS.XmParseMappingCreate(argList, argList.length / 2); |
| OS.XmStringFree(crString); |
| } |
| |
| /** |
| * Invokes platform specific functionality to allocate a new GC handle. |
| * <p> |
| * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
| * API for <code>Device</code>. It is marked public only so that it |
| * can be shared within the packages provided by SWT. It is not |
| * available on all platforms, and should never be called from |
| * application code. |
| * </p> |
| * |
| * @param data the platform specific GC data |
| * @return the platform specific GC handle |
| */ |
| public abstract int internal_new_GC (GCData data); |
| |
| /** |
| * Invokes platform specific functionality to dispose a GC handle. |
| * <p> |
| * <b>IMPORTANT:</b> This method is <em>not</em> part of the public |
| * API for <code>Device</code>. It is marked public only so that it |
| * can be shared within the packages provided by SWT. It is not |
| * available on all platforms, and should never be called from |
| * application code. |
| * </p> |
| * |
| * @param hDC the platform specific GC handle |
| * @param data the platform specific GC data |
| */ |
| public abstract void internal_dispose_GC (int handle, GCData data); |
| |
| /** |
| * Returns <code>true</code> if the device has been disposed, |
| * and <code>false</code> otherwise. |
| * <p> |
| * This method gets the dispose state for the device. |
| * When a device has been disposed, it is an error to |
| * invoke any other method using the device. |
| * |
| * @return <code>true</code> when the device is disposed and <code>false</code> otherwise |
| */ |
| public boolean isDisposed () { |
| return xDisplay == 0; |
| } |
| |
| void new_Object (Object object) { |
| for (int i=0; i<objects.length; i++) { |
| if (objects [i] == null) { |
| objects [i] = object; |
| errors [i] = new Error (); |
| return; |
| } |
| } |
| Object [] newObjects = new Object [objects.length + 128]; |
| System.arraycopy (objects, 0, newObjects, 0, objects.length); |
| newObjects [objects.length] = object; |
| objects = newObjects; |
| Error [] newErrors = new Error [errors.length + 128]; |
| System.arraycopy (errors, 0, newErrors, 0, errors.length); |
| newErrors [errors.length] = new Error (); |
| errors = newErrors; |
| } |
| |
| static synchronized void register (Device device) { |
| for (int i=0; i<Devices.length; i++) { |
| if (Devices [i] == null) { |
| Devices [i] = device; |
| return; |
| } |
| } |
| Device [] newDevices = new Device [Devices.length + 4]; |
| System.arraycopy (Devices, 0, newDevices, 0, Devices.length); |
| newDevices [Devices.length] = device; |
| Devices = newDevices; |
| } |
| |
| /** |
| * Releases any internal resources back to the operating |
| * system and clears all fields except the device handle. |
| * <p> |
| * When a device is destroyed, resources that were acquired |
| * on behalf of the programmer need to be returned to the |
| * operating system. For example, if the device allocated a |
| * font to be used as the system font, this font would be |
| * freed in <code>release</code>. Also,to assist the garbage |
| * collector and minimize the amount of memory that is not |
| * reclaimed when the programmer keeps a reference to a |
| * disposed device, all fields except the handle are zero'd. |
| * The handle is needed by <code>destroy</code>. |
| * </p> |
| * This method is called before <code>destroy</code>. |
| * </p><p> |
| * If subclasses reimplement this method, they must |
| * call the <code>super</code> implementation. |
| * </p> |
| * |
| * @see #dispose |
| * @see #destroy |
| */ |
| protected void release () { |
| /* Free the parsing tables */ |
| OS.XtFree(tabPointer); |
| OS.XtFree(crPointer); |
| OS.XmParseMappingFree(tabMapping); |
| OS.XmParseMappingFree(crMapping); |
| tabPointer = crPointer = tabMapping = crMapping = 0; |
| |
| /* |
| * Free the palette. Note that this disposes all colors on |
| * the display that were allocated using the Color constructor. |
| */ |
| if (xcolors != null) { |
| int xScreen = OS.XDefaultScreen (xDisplay); |
| int xColormap = OS.XDefaultColormap (xDisplay, xScreen); |
| int [] pixel = new int [1]; |
| for (int i = 0; i < xcolors.length; i++) { |
| XColor color = xcolors [i]; |
| if (color != null) { |
| pixel [0] = color.pixel; |
| while (colorRefCount [i] > 0) { |
| OS.XFreeColors (xDisplay, xColormap, pixel, 1, 0); |
| --colorRefCount [i]; |
| } |
| } |
| } |
| } |
| xcolors = null; |
| colorRefCount = null; |
| |
| COLOR_BLACK = COLOR_DARK_RED = COLOR_DARK_GREEN = COLOR_DARK_YELLOW = |
| COLOR_DARK_BLUE = COLOR_DARK_MAGENTA = COLOR_DARK_CYAN = COLOR_GRAY = COLOR_DARK_GRAY = COLOR_RED = |
| COLOR_GREEN = COLOR_YELLOW = COLOR_BLUE = COLOR_MAGENTA = COLOR_CYAN = COLOR_WHITE = null; |
| |
| /* Free the Xt error handler */ |
| int xtContext = OS.XtDisplayToApplicationContext (xDisplay); |
| OS.XtAppSetErrorHandler (xtContext, xtErrorProc); |
| xtErrorCallback.dispose (); xtErrorCallback = null; |
| xtNullErrorProc = xtErrorProc = 0; |
| |
| /* Free the Xt Warning handler */ |
| OS.XtAppSetWarningHandler (xtContext, xtWarningProc); |
| xtWarningCallback.dispose (); xtWarningCallback = null; |
| xtNullWarningProc = xtWarningProc = 0; |
| |
| int index = 0; |
| while (index < Devices.length) { |
| if (Devices [index] != null) break; |
| index++; |
| } |
| if (index == Devices.length) { |
| /* Free the X IO error handler */ |
| OS.XSetIOErrorHandler (XIOErrorProc); |
| XIOErrorCallback.dispose (); XIOErrorCallback = null; |
| XNullIOErrorProc = XIOErrorProc = 0; |
| |
| /* Free the X error handler */ |
| /* |
| * Bug in Motif. For some reason, when a pixmap is |
| * set into a button or label, despite the fact that |
| * the pixmap is cleared from the widget before it |
| * is disposed, Motif still references the pixmap |
| * and attempts to dispose it in XtDestroyApplicationContext(). |
| * The fix is to avoid warnings by leaving our handler |
| * and settings warnings to false. |
| * |
| * NOTE: The warning callback is leaked. |
| */ |
| warnings = false; |
| // OS.XSetErrorHandler (XErrorProc); |
| // XErrorCallback.dispose (); XErrorCallback = null; |
| // XNullErrorProc = XErrorProc = 0; |
| } |
| } |
| |
| /** |
| * If the underlying window system supports printing warning messages |
| * to the console, setting warnings to <code>true</code> prevents these |
| * messages from being printed. If the argument is <code>false</code> |
| * message printing is not blocked. |
| * |
| * @param warnings <code>true</code>if warnings should be handled, and <code>false</code> otherwise |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_DEVICE_DISPOSED - if the receiver has been disposed</li> |
| * </ul> |
| */ |
| public void setWarnings (boolean warnings) { |
| checkDevice (); |
| _setWarnings(warnings); |
| } |
| |
| void _setWarnings (boolean warnings) { |
| this.warnings = warnings; |
| } |
| |
| static int XErrorProc (int xDisplay, int xErrorEvent) { |
| Device device = findDevice (xDisplay); |
| if (device != null) { |
| if (device.warnings) { |
| if (DEBUG || device.debug) { |
| new SWTError ().printStackTrace (); |
| } |
| OS.Call (XErrorProc, xDisplay, xErrorEvent); |
| } |
| } else { |
| OS.Call (XErrorProc, xDisplay, xErrorEvent); |
| } |
| return 0; |
| } |
| |
| static int XIOErrorProc (int xDisplay) { |
| Device device = findDevice (xDisplay); |
| if (device != null && (DEBUG || device.debug)) { |
| new SWTError ().printStackTrace (); |
| } |
| OS.Call (XIOErrorProc, xDisplay, 0); |
| return 0; |
| } |
| |
| int xtErrorProc (int message) { |
| if (DEBUG || debug) { |
| new SWTError ().printStackTrace (); |
| } |
| OS.Call (xtErrorProc, message, 0); |
| return 0; |
| } |
| |
| int xtWarningProc (int message) { |
| if (warnings) { |
| if (DEBUG || debug) { |
| new SWTError ().printStackTrace (); |
| } |
| OS.Call (xtWarningProc, message, 0); |
| } |
| return 0; |
| } |
| |
| } |