/******************************************************************************* * 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.widgets; import org.eclipse.swt.internal.carbon.CFRange; import org.eclipse.swt.internal.carbon.ControlFontStyleRec; import org.eclipse.swt.internal.carbon.FontInfo; import org.eclipse.swt.internal.carbon.OS; import org.eclipse.swt.internal.carbon.Rect; import org.eclipse.swt.*; import org.eclipse.swt.events.*; import org.eclipse.swt.graphics.*; /** * Instances of this class are selectable user interface * objects that allow the user to enter and modify number *

*

*
Styles:
*
READ_ONLY
*
Events:
*
Selection, Modify
*
*

* IMPORTANT: This class is not intended to be subclassed. *

*/ public class Spinner extends Composite { int textHandle, buttonHandle; int textVisibleRgn, buttonVisibleRgn; int increment = 1; int pageIncrement = 10; /** * Constructs a new instance of this class given its parent * and a style value describing its behavior and appearance. *

* The style value is either one of the style constants defined in * class SWT which is applicable to instances of this * class, or must be built by bitwise OR'ing together * (that is, using the int "|" operator) two or more * of those SWT 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 composite control which will be the parent of the new instance (cannot be null) * @param style the style of control to construct * * @exception IllegalArgumentException * @exception SWTException * * @see SWT#READ_ONLY * @see Widget#checkSubclass * @see Widget#getStyle */ public Spinner (Composite parent, int style) { super (parent, checkStyle (style)); } int actionProc (int theControl, int partCode) { int value = getSelectionText (); switch (partCode) { case OS.kControlUpButtonPart: value += increment; break; case OS.kControlDownButtonPart: value -= increment; break; } int max = OS.GetControl32BitMaximum (buttonHandle); int min = OS.GetControl32BitMinimum (buttonHandle); if (value > max) value = min; if (value < min) value = max; setSelection (value, true); return 0; } /** * Adds the listener to the collection of listeners who will * be notified when the receiver's text is modified, by sending * it one of the messages defined in the ModifyListener * interface. * * @param listener the listener which should be notified * * @exception IllegalArgumentException * @exception SWTException * * @see ModifyListener * @see #removeModifyListener */ public void addModifyListener (ModifyListener listener) { checkWidget (); if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener (listener); addListener (SWT.Modify, typedListener); } /** * Adds the listener to the collection of listeners who will * be notified when the control is selected, by sending * it one of the messages defined in the SelectionListener * interface. *

* widgetSelected is not called for texts. * widgetDefaultSelected is typically called when ENTER is pressed in a single-line text. *

* * @param listener the listener which should be notified * * @exception IllegalArgumentException * @exception SWTException * * @see SelectionListener * @see #removeSelectionListener * @see SelectionEvent */ public void addSelectionListener(SelectionListener listener) { checkWidget (); if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener(listener); addListener (SWT.Selection,typedListener); addListener (SWT.DefaultSelection,typedListener); } /** * Adds the listener to the collection of listeners who will * be notified when the receiver's text is verified, by sending * it one of the messages defined in the VerifyListener * interface. * * @param listener the listener which should be notified * * @exception IllegalArgumentException * @exception SWTException * * @see VerifyListener * @see #removeVerifyListener */ void addVerifyListener (VerifyListener listener) { checkWidget(); if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); TypedListener typedListener = new TypedListener (listener); addListener (SWT.Verify, typedListener); } static int checkStyle (int style) { /* * Even though it is legal to create this widget * with scroll bars, they serve no useful purpose * because they do not automatically scroll the * widget's client area. The fix is to clear * the SWT style. */ return style & ~(SWT.H_SCROLL | SWT.V_SCROLL); } protected void checkSubclass () { if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); } public Point computeSize (int wHint, int hHint, boolean changed) { checkWidget (); int width = 0, height = 0; int [] currentPort = new int [1]; short themeFont = (short) defaultThemeFont (); if (font != null) { themeFont = OS.kThemeCurrentPortFont; OS.GetPort (currentPort); OS.SetPortWindowPort (OS.GetControlOwner (textHandle)); OS.TextFont (font.id); OS.TextFace (font.style); OS.TextSize (font.size); } FontInfo info = new FontInfo (); OS.GetFontInfo (info); height = info.ascent + info.descent; int max = OS.GetControl32BitMaximum (buttonHandle); String string = String.valueOf (max); char [] buffer = new char [string.length ()]; string.getChars (0, buffer.length, buffer, 0); int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length); org.eclipse.swt.internal.carbon.Point ioBounds = new org.eclipse.swt.internal.carbon.Point (); if (ptr != 0) { OS.GetThemeTextDimensions (ptr, themeFont, OS.kThemeStateActive, false, ioBounds, null); width = Math.max (width, ioBounds.h); height = Math.max (height, ioBounds.v); OS.CFRelease (ptr); } if (font != null) { OS.SetPort (currentPort [0]); } int [] metric = new int [1]; OS.GetThemeMetric (OS.kThemeMetricLittleArrowsHeight, metric); height = Math.max (height, metric [0]); OS.GetThemeMetric (OS.kThemeMetricEditTextWhitespace, metric); width += metric [0] * 2; if (wHint != SWT.DEFAULT) width = wHint; if (hHint != SWT.DEFAULT) height = hHint; Rectangle trim = computeTrim (0, 0, width, height); return new Point (trim.width, trim.height); } public Rectangle computeTrim (int x, int y, int width, int height) { checkWidget (); Rect inset = inset (); width += inset.left + inset.right; height += inset.top + inset.bottom; int [] outMetric = new int [1]; OS.GetThemeMetric (OS.kThemeMetricLittleArrowsWidth, outMetric); width += outMetric [0]; return new Rectangle (x, y, width, height); } /** * Copies the selected text. *

* The current selection is copied to the clipboard. *

* * @exception SWTException */ public void copy () { checkWidget (); short [] selection = new short [2]; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null) != OS.noErr) return; if (selection [0] == selection [1]) return; int [] actualSize = new int [1]; int [] ptr = new int [1]; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr, actualSize) != OS.noErr) return; CFRange range = new CFRange (); range.location = selection [0]; range.length = selection [1] - selection [0]; char [] buffer= new char [range.length]; OS.CFStringGetCharacters (ptr [0], range, buffer); OS.CFRelease (ptr [0]); copy (buffer); } void copy (char [] buffer) { if (buffer.length == 0) return; OS.ClearCurrentScrap (); int [] scrap = new int [1]; OS.GetCurrentScrap (scrap); OS.PutScrapFlavor (scrap [0], OS.kScrapFlavorTypeUnicode, 0, buffer.length * 2, buffer); } void createHandle () { int window = OS.GetControlOwner (parent.handle); int actionProc = display.actionProc; int features = OS.kControlSupportsEmbedding | OS.kControlSupportsFocus | OS.kControlGetsFocusOnClick; int [] outControl = new int [1]; OS.CreateUserPaneControl (window, null, features, outControl); if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES); handle = outControl [0]; OS.CreateLittleArrowsControl (window, null, 0, 0, 100, 1, outControl); if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES); buttonHandle = outControl [0]; OS.SetControlAction (buttonHandle, actionProc); OS.CreateEditUnicodeTextControl (window, null, 0, false, null, outControl); if (outControl [0] == 0) error (SWT.ERROR_NO_HANDLES); textHandle = outControl [0]; OS.SetControlData (textHandle, OS.kControlEntireControl, OS.kControlEditTextSingleLineTag, 1, new byte [] {1}); if ((style & SWT.READ_ONLY) != 0) { OS.SetControlData (textHandle, OS.kControlEntireControl, OS.kControlEditTextLockedTag, 1, new byte [] {1}); } setSelection (0, false); } /** * Cuts the selected text. *

* The current selection is first copied to the * clipboard and then deleted from the widget. *

* * @exception SWTException */ public void cut () { checkWidget (); if ((style & SWT.READ_ONLY) != 0) return; short [] selection = new short [2]; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null) != OS.noErr) return; if (selection [0] == selection [1]) return; char [] buffer = setText ("", selection [0], selection [1], true); if (buffer != null) { copy (buffer); } } void deregister () { super.deregister (); display.removeWidget(textHandle); display.removeWidget(buttonHandle); } void drawBackground (int control) { drawBackground (control, background); } int focusHandle () { return textHandle; } /** * Returns the amount that the receiver's value will be * modified by when the up/down arrows are pressed. * * @return the increment * * @exception SWTException */ public int getIncrement () { checkWidget (); return increment; } /** * Returns the maximum value which the receiver will allow. * * @return the maximum * * @exception SWTException */ public int getMaximum () { checkWidget (); return OS.GetControl32BitMaximum (buttonHandle); } /** * Returns the minimum value which the receiver will allow. * * @return the minimum * * @exception SWTException */ public int getMinimum () { checkWidget (); return OS.GetControl32BitMinimum (buttonHandle); } /** * Returns the amount that the receiver's value will be * modified by when the page increment/decrement areas * are selected. * * @return the page increment * * @exception SWTException */ public int getPageIncrement () { checkWidget (); return pageIncrement; } /** * Returns the single selection that is the receiver's position. * * @return the selection * * @exception SWTException */ public int getSelection () { checkWidget (); return OS.GetControl32BitValue (buttonHandle); } int getSelectionText () { int [] actualSize = new int [1]; int [] ptr = new int [1]; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr, actualSize) == OS.noErr) { CFRange range = new CFRange (); range.location = 0; range.length = OS.CFStringGetLength (ptr [0]); char [] buffer= new char [range.length]; OS.CFStringGetCharacters (ptr [0], range, buffer); OS.CFRelease (ptr [0]); String string = new String (buffer); try { int value = Integer.parseInt (string); int max = OS.GetControl32BitMaximum (buttonHandle); int min = OS.GetControl32BitMinimum (buttonHandle); if (min <= value && value <= max) return value; } catch (NumberFormatException e) { } } return OS.GetControl32BitValue (buttonHandle); } int getVisibleRegion (int control, boolean clipChildren) { if (control == textHandle) { if (!clipChildren) return super.getVisibleRegion (control, clipChildren); if (textVisibleRgn == 0) { textVisibleRgn = OS.NewRgn (); calculateVisibleRegion (control, textVisibleRgn, clipChildren); } int result = OS.NewRgn (); OS.CopyRgn (textVisibleRgn, result); return result; } if (control == buttonHandle) { if (!clipChildren) return super.getVisibleRegion (control, clipChildren); if (buttonVisibleRgn == 0) { buttonVisibleRgn = OS.NewRgn (); calculateVisibleRegion (control, buttonVisibleRgn, clipChildren); } int result = OS.NewRgn (); OS.CopyRgn (buttonVisibleRgn, result); return result; } return super.getVisibleRegion (control, clipChildren); } void hookEvents () { super.hookEvents (); int controlProc = display.controlProc; int [] mask = new int [] { OS.kEventClassControl, OS.kEventControlDraw, OS.kEventClassControl, OS.kEventControlSetFocusPart, }; int controlTarget = OS.GetControlEventTarget (textHandle); OS.InstallEventHandler (controlTarget, controlProc, mask.length / 2, mask, handle, null); controlTarget = OS.GetControlEventTarget (buttonHandle); OS.InstallEventHandler (controlTarget, controlProc, mask.length / 2, mask, handle, null); } Rect inset () { return display.spinnerInset; } int kEventControlSetFocusPart (int nextHandler, int theEvent, int userData) { int result = super.kEventControlSetFocusPart (nextHandler, theEvent, userData); if (result == OS.noErr) return result; short [] part = new short [1]; OS.GetEventParameter (theEvent, OS.kEventParamControlPart, OS.typeControlPartCode, null, 2, null, part); if (part [0] == OS.kControlFocusNoPart) { int value = getSelectionText (); setSelection (value, true); } return result; } int kEventTextInputUnicodeForKeyEvent (int nextHandler, int theEvent, int userData) { int result = super.kEventTextInputUnicodeForKeyEvent (nextHandler, theEvent, userData); if (result == OS.noErr) return result; int [] keyboardEvent = new int [1]; OS.GetEventParameter (theEvent, OS.kEventParamTextInputSendKeyboardEvent, OS.typeEventRef, null, keyboardEvent.length * 4, null, keyboardEvent); int [] keyCode = new int [1]; OS.GetEventParameter (keyboardEvent [0], OS.kEventParamKeyCode, OS.typeUInt32, null, keyCode.length * 4, null, keyCode); int delta = 0; switch (keyCode [0]) { case 36: /* Return */ int value = getSelectionText (); setSelection (value, true); postEvent (SWT.DefaultSelection); break; case 116: /* Page Up */ delta = pageIncrement; break; case 121: /* Page Down */ delta = -pageIncrement; break; case 125: /* Down */ delta = -increment; break; case 126: /* Up */ delta = increment; break; } if (delta != 0) { int value = getSelectionText () + delta; int max = OS.GetControl32BitMaximum (buttonHandle); int min = OS.GetControl32BitMinimum (buttonHandle); if (value > max) value = min; if (value < min) value = max; setSelection (value, true); return OS.noErr; } return result; } /** * Pastes text from clipboard. *

* The selected text is deleted from the widget * and new text inserted from the clipboard. *

* * @exception SWTException */ public void paste () { checkWidget (); if ((style & SWT.READ_ONLY) != 0) return; int[] scrap = new int [1]; OS.GetCurrentScrap (scrap); int [] size = new int [1]; if (OS.GetScrapFlavorSize (scrap [0], OS.kScrapFlavorTypeUnicode, size) != OS.noErr || size [0] == 0) return; char [] buffer = new char [size [0]]; if (OS.GetScrapFlavorData (scrap [0], OS.kScrapFlavorTypeUnicode, size, buffer) != OS.noErr) return; short [] selection = new short [2]; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null) != OS.noErr) return; setText (new String (buffer), selection [0], selection [1], true); } public void redraw () { checkWidget(); super.redraw (); redrawWidget (textHandle, false); redrawWidget (buttonHandle, false); } void register () { super.register (); display.addWidget (textHandle, this); display.addWidget (buttonHandle, this); } /** * Removes the listener from the collection of listeners who will * be notified when the receiver's text is modified. * * @param listener the listener which should no longer be notified * * @exception IllegalArgumentException * @exception SWTException * * @see ModifyListener * @see #addModifyListener */ public void removeModifyListener (ModifyListener listener) { checkWidget (); if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook (SWT.Modify, listener); } /** * Removes the listener from the collection of listeners who will * be notified when the control is selected. * * @param listener the listener which should be notified * * @exception IllegalArgumentException * @exception SWTException * * @see SelectionListener * @see #addSelectionListener */ public void removeSelectionListener(SelectionListener listener) { checkWidget (); if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook (SWT.Selection, listener); eventTable.unhook (SWT.DefaultSelection,listener); } /** * Removes the listener from the collection of listeners who will * be notified when the control is verified. * * @param listener the listener which should be notified * * @exception IllegalArgumentException * @exception SWTException * * @see VerifyListener * @see #addVerifyListener */ void removeVerifyListener (VerifyListener listener) { checkWidget (); if (listener == null) error (SWT.ERROR_NULL_ARGUMENT); if (eventTable == null) return; eventTable.unhook (SWT.Verify, listener); } void resetVisibleRegion (int control) { if (textVisibleRgn != 0) { OS.DisposeRgn (textVisibleRgn); textVisibleRgn = 0; } if (buttonVisibleRgn != 0) { OS.DisposeRgn (buttonVisibleRgn); buttonVisibleRgn = 0; } super.resetVisibleRegion (control); } void resizeClientArea () { int [] outMetric = new int [1]; OS.GetThemeMetric (OS.kThemeMetricLittleArrowsWidth, outMetric); int buttonWidth = outMetric [0]; OS.GetThemeMetric (OS.kThemeMetricLittleArrowsHeight, outMetric); int buttonHeight = outMetric [0]; Rect rect = new Rect (); OS.GetControlBounds (handle, rect); Rect inset = inset (); int width = Math.max (0, rect.right - rect.left - inset.left - inset.right - buttonWidth); int height = Math.max (0, rect.bottom - rect.top - inset.top - inset.bottom); buttonHeight = Math.min (buttonHeight, rect.bottom - rect.top); setBounds (textHandle, inset.left, inset.top, width, height, true, true, false); setBounds (buttonHandle, inset.left + inset.right + width, (rect.bottom - rect.top - buttonHeight) / 2, buttonWidth, buttonHeight, true, true, false); } boolean sendKeyEvent (int type, Event event) { if (!super.sendKeyEvent (type, event)) { return false; } if (type != SWT.KeyDown) return true; if ((style & SWT.READ_ONLY) != 0) return true; if (event.character == 0) return true; // if (!hooks (SWT.Verify) && !filters (SWT.Verify)) return true; String oldText = "", newText = ""; int [] actualSize = new int [1]; int [] ptr = new int [1]; int charCount = 0; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr, actualSize) == OS.noErr) { charCount = OS.CFStringGetLength (ptr [0]); OS.CFRelease (ptr [0]); } short [] selection = new short [2]; OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection, null); int start = selection [0], end = selection [1]; switch (event.character) { case SWT.BS: if (start == end) { if (start == 0) return true; start = Math.max (0, start - 1); } break; case SWT.DEL: if (start == end) { if (start == charCount) return true; end = Math.min (end + 1, charCount); } break; case SWT.CR: return true; default: if (event.character != '\t' && event.character < 0x20) return true; oldText = new String (new char [] {event.character}); } newText = verifyText (oldText, start, end, event); if (newText == null) return false; if (newText != oldText) { setText (newText, start, end, false); start += newText.length (); selection = new short [] {(short)start, (short)start }; OS.SetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextSelectionTag, 4, selection); } /* * Post the modify event so that the character will be inserted * into the widget when the modify event is delivered. Normally, * modify events are sent but it is safe to post the event here * because this method is called from the event loop. */ postEvent (SWT.Modify); return newText == oldText; } void setBackground (float [] color) { super.setBackground (color); ControlFontStyleRec fontStyle = new ControlFontStyleRec (); OS.GetControlData (textHandle, (short) OS.kControlEntireControl, OS.kControlFontStyleTag, ControlFontStyleRec.sizeof, fontStyle, null); if (color != null) { fontStyle.backColor_red = (short) (color [0] * 0xffff); fontStyle.backColor_green = (short) (color [1] * 0xffff); fontStyle.backColor_blue = (short) (color [2] * 0xffff); fontStyle.flags |= OS.kControlUseBackColorMask; } else { fontStyle.flags &= ~OS.kControlUseBackColorMask; } OS.SetControlFontStyle (textHandle, fontStyle); } void setFontStyle (Font font) { super.setFontStyle (font); setFontStyle (textHandle, font); } void setForeground (float [] color) { super.setForeground (color); ControlFontStyleRec fontStyle = new ControlFontStyleRec (); OS.GetControlData (textHandle, (short) OS.kControlEntireControl, OS.kControlFontStyleTag, ControlFontStyleRec.sizeof, fontStyle, null); if (color != null) { fontStyle.foreColor_red = (short) (color [0] * 0xffff); fontStyle.foreColor_green = (short) (color [1] * 0xffff); fontStyle.foreColor_blue = (short) (color [2] * 0xffff); fontStyle.flags |= OS.kControlUseForeColorMask; } else { fontStyle.flags &= ~OS.kControlUseForeColorMask; } OS.SetControlFontStyle (textHandle, fontStyle); } /** * Sets the amount that the receiver's value will be * modified by when the up/down (or right/left) arrows * are pressed to the argument, which must be at least * one. * * @param increment the new increment (must be greater than zero) * * @exception SWTException */ public void setIncrement (int value) { checkWidget (); if (value < 1) return; increment = value; } /** * Sets the maximum value that the receiver will allow. This new * value will be ignored if it is not greater than the receiver's current * minimum value. If the new maximum is applied then the receiver's * selection value will be adjusted if necessary to fall within its new range. * * @param value the new maximum, which must be greater than the current minimum * * @exception SWTException */ public void setMaximum (int value) { checkWidget (); if (value < 0) return; int min = OS.GetControl32BitMinimum (buttonHandle); if (value <= min) return; int pos = OS.GetControl32BitValue (buttonHandle); OS.SetControl32BitMaximum (buttonHandle, value); if (pos > value) setSelection (value, false); } /** * Sets the minimum value that the receiver will allow. This new * value will be ignored if it is negative or is not less than the receiver's * current maximum value. If the new minimum is applied then the receiver's * selection value will be adjusted if necessary to fall within its new range. * * @param value the new minimum, which must be nonnegative and less than the current maximum * * @exception SWTException */ public void setMinimum (int value) { checkWidget (); if (value < 0) return; int max = OS.GetControl32BitMaximum (buttonHandle); if (value >= max) return; int pos = OS.GetControl32BitValue (buttonHandle); OS.SetControl32BitMinimum (buttonHandle, value); if (pos < value) setSelection (value, false); } /** * Sets the amount that the receiver's value will be * modified by when the page increment/decrement areas * are selected to the argument, which must be at least * one. * * @param pageIncrement the page increment (must be greater than zero) * * @exception SWTException */ public void setPageIncrement (int value) { checkWidget (); if (value < 1) return; pageIncrement = value; } /** * Sets the single selection that is the receiver's * value to the argument which must be greater than or equal * to zero. * * @param value the new selection (must be zero or greater) * * @exception SWTException */ public void setSelection (int value) { checkWidget (); int min = OS.GetControl32BitMinimum (buttonHandle); int max = OS.GetControl32BitMaximum (buttonHandle); value = Math.min (Math.max (min, value), max); setSelection (value, false); } void setSelection (int value, boolean notify) { OS.SetControl32BitValue (buttonHandle, value); String string = String.valueOf (value); if (hooks (SWT.Verify) || filters (SWT.Verify)) { int [] actualSize = new int [1]; int [] ptr = new int [1]; int length = 0; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr, actualSize) == OS.noErr) { length = OS.CFStringGetLength (ptr [0]); OS.CFRelease (ptr [0]); } string = verifyText (string, 0, length, null); if (string == null) return; } char [] buffer = new char [string.length ()]; string.getChars (0, buffer.length, buffer, 0); int ptr = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, buffer, buffer.length); if (ptr == 0) error (SWT.ERROR_CANNOT_SET_TEXT); OS.SetControlData (textHandle, OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, new int[] {ptr}); OS.CFRelease (ptr); sendEvent (SWT.Modify); if (notify) postEvent (SWT.Selection); } char [] setText (String string, int start, int end, boolean notify) { if (notify) { if (hooks (SWT.Verify) || filters (SWT.Verify)) { string = verifyText (string, start, end, null); if (string == null) return null; } } int [] actualSize = new int [1]; int [] ptr = new int [1]; if (OS.GetControlData (textHandle, (short)OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr, actualSize) != OS.noErr) return null; int length = OS.CFStringGetLength (ptr [0]); char [] text = new char [length - (end - start) + string.length ()]; CFRange range = new CFRange (); range.location = 0; range.length = start; char [] buffer = new char [range.length]; OS.CFStringGetCharacters (ptr [0], range, buffer); System.arraycopy (buffer, 0, text, 0, range.length); string.getChars (0, string.length (), text, start); range.location = end; range.length = length - end; buffer = new char [range.length]; OS.CFStringGetCharacters (ptr [0], range, buffer); System.arraycopy (buffer, 0, text, start + string.length (), range.length); /* Copying the return value to buffer */ range.location = start; range.length = end - start; buffer = new char [range.length]; OS.CFStringGetCharacters (ptr [0], range, buffer); OS.CFRelease (ptr [0]); ptr [0] = OS.CFStringCreateWithCharacters (OS.kCFAllocatorDefault, text, text.length); if (ptr [0] == 0) error (SWT.ERROR_CANNOT_SET_TEXT); OS.SetControlData (textHandle, OS.kControlEntireControl, OS.kControlEditTextCFStringTag, 4, ptr); OS.CFRelease (ptr [0]); if (notify) sendEvent (SWT.Modify); return buffer; } void setZOrder () { super.setZOrder (); if (textHandle != 0) OS.HIViewAddSubview (handle, textHandle); if (buttonHandle != 0) OS.HIViewAddSubview (handle, buttonHandle); } String verifyText (String string, int start, int end, Event keyEvent) { Event event = new Event (); event.text = string; event.start = start; event.end = end; if (keyEvent != null) { event.character = keyEvent.character; event.keyCode = keyEvent.keyCode; event.stateMask = keyEvent.stateMask; } int index = 0; while (index < string.length ()) { if (!Character.isDigit (string.charAt (index))) break; index++; } event.doit = index == string.length (); /* * It is possible (but unlikely), that application * code could have disposed the widget in the verify * event. If this happens, answer null to cancel * the operation. */ sendEvent (SWT.Verify, event); if (!event.doit || isDisposed ()) return null; return event.text; } }