| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * 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 |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.wpf.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * Instances of this class are selectable user interface |
| * objects that allow the user to enter and modify numeric |
| * values. |
| * <p> |
| * Note that although this class is a subclass of <code>Composite</code>, |
| * it does not make sense to add children to it, or set a layout on it. |
| * </p><p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>READ_ONLY, WRAP</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection, Modify, Verify</dd> |
| * </dl> |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#spinner">Spinner snippets</a> |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * |
| * @since 3.1 |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class Spinner extends Composite { |
| int textHandle, upHandle, downHandle; |
| int increment, pageIncrement, digits, max, min, value; |
| |
| /** |
| * the operating system limit for the number of characters |
| * that the text field in an instance of this class can hold |
| * |
| * @since 3.4 |
| */ |
| public static final int LIMIT; |
| |
| /* |
| * These values can be different on different platforms. |
| * Therefore they are not initialized in the declaration |
| * to stop the compiler from inlining. |
| */ |
| static { |
| LIMIT = 0x7FFFFFFF; |
| } |
| /** |
| * 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> |
| * |
| * @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 <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</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#READ_ONLY |
| * @see SWT#WRAP |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Spinner (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| |
| Control [] _getChildren () { |
| return new Control [0]; |
| } |
| |
| 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); |
| } |
| |
| int backgroundHandle () { |
| return textHandle; |
| } |
| |
| int backgroundProperty () { |
| return OS.Control_BackgroundProperty (); |
| } |
| |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget (); |
| return super.computeSize (handle, wHint, hHint, changed); |
| } |
| |
| int createArrow (int direction) { |
| int geometry = OS.gcnew_StreamGeometry (); |
| int context = OS.StreamGeometry_Open (geometry); |
| int start = 0, point = 0, end = 0; |
| switch (direction) { |
| case SWT.DOWN: |
| start = OS.gcnew_Point (0, 0); |
| point = OS.gcnew_Point (3, 3); |
| end = OS.gcnew_Point (6, 0); |
| break; |
| case SWT.UP: |
| start = OS.gcnew_Point (0, 3); |
| point = OS.gcnew_Point (3, 0); |
| end = OS.gcnew_Point (6, 3); |
| break; |
| } |
| OS.StreamGeometryContext_BeginFigure (context, start, true, true); |
| OS.StreamGeometryContext_LineTo (context, point, true, true); |
| OS.StreamGeometryContext_LineTo (context, end, true, true); |
| OS.StreamGeometryContext_Close (context); |
| int path = OS.gcnew_Path (); |
| OS.Path_Data (path, geometry); |
| int padding = OS.gcnew_Thickness (3, 0, 3, 0); |
| OS.FrameworkElement_Margin (path, padding); |
| int brush = OS.Brushes_Black (); |
| OS.Path_Fill (path, brush); |
| OS.FrameworkElement_HorizontalAlignment (path, OS.HorizontalAlignment_Center); |
| OS.FrameworkElement_VerticalAlignment (path, OS.VerticalAlignment_Center); |
| OS.GCHandle_Free (padding); |
| OS.GCHandle_Free (start); |
| OS.GCHandle_Free (point); |
| OS.GCHandle_Free (end); |
| OS.GCHandle_Free (brush); |
| OS.GCHandle_Free (context); |
| OS.GCHandle_Free (geometry); |
| return path; |
| } |
| |
| void createHandle () { |
| handle = OS.gcnew_Grid (); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| int row0 = OS.gcnew_RowDefinition (); |
| int row1 = OS.gcnew_RowDefinition (); |
| int rows = OS.Grid_RowDefinitions (handle); |
| OS.RowDefinitionCollection_Add (rows, row0); |
| OS.RowDefinitionCollection_Add (rows, row1); |
| int col0 = OS.gcnew_ColumnDefinition (); |
| int col1 = OS.gcnew_ColumnDefinition (); |
| int columns = OS.Grid_ColumnDefinitions (handle); |
| OS.ColumnDefinitionCollection_Add (columns, col0); |
| OS.ColumnDefinitionCollection_Add (columns, col1); |
| int gridChildren = OS.Panel_Children (handle); |
| textHandle = OS.gcnew_TextBox (); |
| if (textHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.Grid_SetRowSpan (textHandle, 2); |
| OS.UIElementCollection_Add (gridChildren, textHandle); |
| if ((style & SWT.READ_ONLY) != 0) OS.TextBoxBase_IsReadOnly (textHandle, true); |
| upHandle = OS.gcnew_RepeatButton (); |
| if (upHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| int upArrow = createArrow (SWT.UP); |
| OS.ContentControl_Content (upHandle, upArrow); |
| OS.Grid_SetColumn (upHandle, 1); |
| OS.UIElementCollection_Add (gridChildren, upHandle); |
| downHandle = OS.gcnew_RepeatButton (); |
| if (downHandle == 0) error (SWT.ERROR_NO_HANDLES); |
| int downArrow = createArrow (SWT.DOWN); |
| OS.ContentControl_Content (downHandle, downArrow); |
| OS.Grid_SetColumn (downHandle, 1); |
| OS.Grid_SetRow (downHandle, 1); |
| OS.UIElementCollection_Add (gridChildren, downHandle); |
| int colWidth0 = OS.gcnew_GridLength (10, OS.GridUnitType_Star); |
| OS.ColumnDefinition_Width(col0, colWidth0); |
| int colWidth1 = OS.gcnew_GridLength (1, OS.GridUnitType_Auto); |
| OS.ColumnDefinition_Width (col1, colWidth1); |
| OS.GCHandle_Free (colWidth0); |
| OS.GCHandle_Free (colWidth1); |
| OS.GCHandle_Free (upArrow); |
| OS.GCHandle_Free (downArrow); |
| OS.GCHandle_Free (row0); |
| OS.GCHandle_Free (row1); |
| OS.GCHandle_Free (rows); |
| OS.GCHandle_Free (col0); |
| OS.GCHandle_Free (col1); |
| OS.GCHandle_Free (columns); |
| OS.GCHandle_Free (gridChildren); |
| } |
| |
| void createWidget () { |
| super.createWidget(); |
| increment = 1; |
| pageIncrement = 10; |
| digits = 0; |
| max = 100; |
| value = 0; |
| int ptr = createDotNetString ("0", false); |
| OS.TextBox_Text (textHandle, ptr); |
| OS.GCHandle_Free (ptr); |
| } |
| |
| /** |
| * 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 <code>ModifyListener</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 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 the user, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is not called for texts. |
| * <code>widgetDefaultSelected</code> is typically called when ENTER is pressed in a single-line text. |
| * </p> |
| * |
| * @param listener the listener which should be notified when the control is selected by the user |
| * |
| * @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 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 <code>VerifyListener</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 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); |
| } |
| |
| /** |
| * Copies the selected text. |
| * <p> |
| * The current selection is copied to the clipboard. |
| * </p> |
| * |
| * @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 void copy () { |
| checkWidget (); |
| //TODO |
| } |
| |
| /** |
| * Cuts the selected text. |
| * <p> |
| * The current selection is first copied to the |
| * clipboard and then deleted from the widget. |
| * </p> |
| * |
| * @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 void cut () { |
| checkWidget (); |
| if ((style & SWT.READ_ONLY) != 0) return; |
| //TODO |
| } |
| |
| /** |
| * Returns the number of decimal places used by the receiver. |
| * |
| * @return the digits |
| * |
| * @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 int getDigits () { |
| checkWidget (); |
| return digits; |
| } |
| |
| String getDecimalSeparator () { |
| return "."; |
| } |
| |
| /** |
| * Returns the amount that the receiver's value will be |
| * modified by when the up/down arrows are pressed. |
| * |
| * @return the increment |
| * |
| * @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 int getIncrement () { |
| checkWidget (); |
| return increment; |
| } |
| |
| /** |
| * Returns the maximum value which the receiver will allow. |
| * |
| * @return the maximum |
| * |
| * @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 int getMaximum () { |
| checkWidget (); |
| return max; |
| } |
| |
| /** |
| * Returns the minimum value which the receiver will allow. |
| * |
| * @return the minimum |
| * |
| * @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 int getMinimum () { |
| checkWidget (); |
| return min; |
| } |
| |
| /** |
| * Returns the amount that the receiver's position will be |
| * modified by when the page up/down keys are pressed. |
| * |
| * @return the page increment |
| * |
| * @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 int getPageIncrement () { |
| checkWidget (); |
| return pageIncrement; |
| } |
| |
| /** |
| * Returns the <em>selection</em>, which is the receiver's position. |
| * |
| * @return the selection |
| * |
| * @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 int getSelection () { |
| checkWidget (); |
| return value; |
| } |
| |
| int getSelectionText (boolean [] parseFail) { |
| int textPtr = OS.TextBox_Text (textHandle); |
| String string = createJavaString (textPtr); |
| OS.GCHandle_Free (textPtr); |
| try { |
| int value; |
| if (digits > 0) { |
| String decimalSeparator = getDecimalSeparator (); |
| int index = string.indexOf (decimalSeparator); |
| if (index != -1) { |
| int startIndex = string.startsWith ("+") || string.startsWith ("-") ? 1 : 0; |
| String wholePart = startIndex != index ? string.substring (startIndex, index) : "0"; |
| String decimalPart = string.substring (index + 1); |
| if (decimalPart.length () > digits) { |
| decimalPart = decimalPart.substring (0, digits); |
| } else { |
| int i = digits - decimalPart.length (); |
| for (int j = 0; j < i; j++) { |
| decimalPart = decimalPart + "0"; |
| } |
| } |
| int wholeValue = Integer.parseInt (wholePart); |
| int decimalValue = Integer.parseInt (decimalPart); |
| for (int i = 0; i < digits; i++) wholeValue *= 10; |
| value = wholeValue + decimalValue; |
| if (string.startsWith ("-")) value = -value; |
| } else { |
| value = Integer.parseInt (string); |
| for (int i = 0; i < digits; i++) value *= 10; |
| } |
| } else { |
| value = Integer.parseInt (string); |
| } |
| if (min <= value && value <= max) return value; |
| } catch (NumberFormatException e) { |
| } |
| parseFail [0] = true; |
| return -1; |
| } |
| |
| /** |
| * Returns a string containing a copy of the contents of the |
| * receiver's text field, or an empty string if there are no |
| * contents. |
| * |
| * @return the receiver's text |
| * |
| * @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 String getText () { |
| checkWidget (); |
| int text = OS.TextBox_Text (textHandle); |
| String string = createJavaString (text); |
| OS.GCHandle_Free (text); |
| return string; |
| } |
| |
| /** |
| * Returns the maximum number of characters that the receiver's |
| * text field is capable of holding. If this has not been changed |
| * by <code>setTextLimit()</code>, it will be the constant |
| * <code>Spinner.LIMIT</code>. |
| * |
| * @return the text limit |
| * |
| * @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 #LIMIT |
| * |
| * @since 3.4 |
| */ |
| public int getTextLimit () { |
| checkWidget (); |
| return OS.TextBox_MaxLength (textHandle); |
| } |
| |
| void HandleDownClick (int sender, int e) { |
| if (!checkEvent (e)) return; |
| updateSelection (-increment); |
| } |
| |
| void HandleLostKeyboardFocus (int sender, int e) { |
| if (!checkEvent (e)) return; |
| boolean [] parseFail = new boolean [1]; |
| getSelectionText (parseFail); |
| if (parseFail [0]) { |
| setSelection (value, false, true, false); |
| } |
| super.HandleLostKeyboardFocus (sender, e); |
| } |
| |
| void HandlePreviewKeyDown (int sender, int e) { |
| super.HandlePreviewKeyDown (sender, e); |
| if (!checkEvent (e)) return; |
| int key = OS.KeyEventArgs_Key (e); |
| int delta = 0; |
| switch (key) { |
| case OS.Key_Return: |
| postEvent (SWT.DefaultSelection); |
| break; |
| case OS.Key_Down: delta -= increment; break; |
| case OS.Key_Up: delta += increment; break; |
| case OS.Key_PageDown: delta -= pageIncrement; break; |
| case OS.Key_PageUp: delta += pageIncrement; break; |
| } |
| if (delta != 0) { |
| updateSelection (delta); |
| } |
| } |
| |
| void HandlePreviewTextInput (int sender, int e) { |
| super.HandlePreviewTextInput (sender, e); |
| if (!checkEvent (e)) return; |
| int textPtr = OS.TextCompositionEventArgs_Text (e); |
| String input = createJavaString(textPtr); |
| OS.GCHandle_Free (textPtr); |
| int start = OS.TextBox_SelectionStart (textHandle); |
| int end = start + OS.TextBox_SelectionLength (textHandle); |
| String text = verifyText (input, start, end); |
| if (text != null && !text.equals (input)) { |
| textPtr = createDotNetString (text, false); |
| OS.TextBox_SelectedText (textHandle, textPtr); |
| OS.GCHandle_Free (textPtr); |
| start = OS.TextBox_SelectionStart (textHandle); |
| int length = OS.TextBox_SelectionLength (textHandle); |
| OS.TextBox_Select (textHandle, start+length, 0); |
| OS.TextBox_SelectionLength (textHandle, 0); |
| text = null; |
| } |
| if (text == null) OS.TextCompositionEventArgs_Handled (e, true); |
| } |
| |
| void HandleTextChanged (int sender, int e) { |
| if (!checkEvent (e)) return; |
| boolean [] parseFail = new boolean [1]; |
| int value = getSelectionText (parseFail); |
| if (!parseFail [0]) { |
| if (this.value != value) setSelection(value, true, false, true); |
| } |
| sendEvent (SWT.Modify); |
| } |
| |
| void HandleUpClick (int sender, int e) { |
| if (!checkEvent (e)) return; |
| updateSelection (increment); |
| } |
| |
| void hookEvents () { |
| super.hookEvents(); |
| //TEXT |
| int handler = OS.gcnew_TextCompositionEventHandler (jniRef, "HandlePreviewTextInput"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.UIElement_PreviewTextInput (textHandle, handler); |
| OS.GCHandle_Free (handler); |
| // handler = OS.gcnew_ExecutedRoutedEventHandler(jniRef, "HandlePreviewExecutedRoutedEvent"); |
| // if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| // OS.CommandManager_AddPreviewExecutedHandler(handle, handler); |
| // OS.GCHandle_Free(handler); |
| handler = OS.gcnew_TextChangedEventHandler (jniRef, "HandleTextChanged"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.TextBoxBase_TextChanged (textHandle, handler); |
| OS.GCHandle_Free (handler); |
| |
| //BUTTON |
| handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleDownClick"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ButtonBase_Click (downHandle, handler); |
| OS.GCHandle_Free (handler); |
| handler = OS.gcnew_RoutedEventHandler (jniRef, "HandleUpClick"); |
| if (handler == 0) error (SWT.ERROR_NO_HANDLES); |
| OS.ButtonBase_Click (upHandle, handler); |
| OS.GCHandle_Free (handler); |
| } |
| |
| /** |
| * Pastes text from clipboard. |
| * <p> |
| * The selected text is deleted from the widget |
| * and new text inserted from the clipboard. |
| * </p> |
| * |
| * @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 void paste () { |
| checkWidget (); |
| //TODO |
| } |
| |
| void releaseHandle () { |
| super.releaseHandle(); |
| OS.GCHandle_Free (textHandle); |
| OS.GCHandle_Free (upHandle); |
| OS.GCHandle_Free (downHandle); |
| } |
| |
| /** |
| * 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 <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 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 by the user. |
| * |
| * @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 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 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 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); |
| } |
| |
| /** |
| * Sets the number of decimal places used by the receiver. |
| * <p> |
| * The digit setting is used to allow for floating point values in the receiver. |
| * For example, to set the selection to a floating point value of 1.37 call setDigits() with |
| * a value of 2 and setSelection() with a value of 137. Similarly, if getDigits() has a value |
| * of 2 and getSelection() returns 137 this should be interpreted as 1.37. This applies to all |
| * numeric APIs. |
| * </p> |
| * |
| * @param value the new digits (must be greater than or equal to zero) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the value is less than zero</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> |
| */ |
| public void setDigits (int value) { |
| checkWidget (); |
| if (value < 0) error (SWT.ERROR_INVALID_ARGUMENT); |
| digits = value; |
| setSelection (this.value, false, true, false); |
| } |
| |
| /** |
| * Sets the amount that the receiver's value will be |
| * modified by when the up/down arrows are pressed to |
| * the argument, which must be at least one. |
| * |
| * @param value the new increment (must be greater than zero) |
| * |
| * @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 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 <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 void setMaximum (int value) { |
| checkWidget (); |
| if (value <= min) return; |
| max = value; |
| if (this.value > value) setSelection (value, true, true, false); |
| } |
| |
| /** |
| * Sets the minimum value that the receiver will allow. This new |
| * value will be ignored if it 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 less than the current maximum |
| * |
| * @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 void setMinimum (int value) { |
| checkWidget (); |
| if (value >= max) return; |
| min = value; |
| if (this.value < value) setSelection (value, true, true, false); |
| } |
| |
| /** |
| * Sets the amount that the receiver's position will be |
| * modified by when the page up/down keys are pressed |
| * to the argument, which must be at least one. |
| * |
| * @param value the page increment (must be greater than zero) |
| * |
| * @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 void setPageIncrement (int value) { |
| checkWidget (); |
| if (value < 1) return; |
| pageIncrement = value; |
| } |
| |
| /** |
| * Sets the <em>selection</em>, which is the receiver's |
| * position, to the argument. If the argument is not within |
| * the range specified by minimum and maximum, it will be |
| * adjusted to fall within this range. |
| * |
| * @param value the new selection (must be zero or greater) |
| * |
| * @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 void setSelection (int value) { |
| checkWidget (); |
| value = Math.min (Math.max (min, value), max); |
| setSelection (value, true, true, false); |
| } |
| |
| void setSelection (int value, boolean setPos, boolean setText, boolean notify) { |
| if (setPos) { |
| this.value = value; |
| } |
| if (setText) { |
| String string; |
| if (digits == 0) { |
| string = String.valueOf (value); |
| } else { |
| string = String.valueOf (Math.abs (value)); |
| String decimalSeparator = getDecimalSeparator (); |
| int index = string.length () - digits; |
| StringBuffer buffer = new StringBuffer (); |
| if (value < 0) buffer.append ("-"); |
| if (index > 0) { |
| buffer.append (string.substring (0, index)); |
| buffer.append (decimalSeparator); |
| buffer.append (string.substring (index)); |
| } else { |
| buffer.append ("0"); |
| buffer.append (decimalSeparator); |
| while (index++ < 0) buffer.append ("0"); |
| buffer.append (string); |
| } |
| string = buffer.toString (); |
| } |
| // if (hooks (SWT.Verify) || filters (SWT.Verify)) { |
| // int length = OS.GetWindowTextLength (hwndText); |
| // string = verifyText (string, 0, length, null); |
| // if (string == null) return; |
| // } |
| int ptr = createDotNetString (string, false); |
| OS.TextBox_Text (textHandle, ptr); |
| OS.GCHandle_Free (ptr); |
| } |
| if (notify) postEvent (SWT.Selection); |
| } |
| |
| /** |
| * Sets the maximum number of characters that the receiver's |
| * text field is capable of holding to be the argument. |
| * <p> |
| * To reset this value to the default, use <code>setTextLimit(Spinner.LIMIT)</code>. |
| * Specifying a limit value larger than <code>Spinner.LIMIT</code> sets the |
| * receiver's limit to <code>Spinner.LIMIT</code>. |
| * </p> |
| * @param limit new text limit |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</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 #LIMIT |
| * |
| * @since 3.4 |
| */ |
| public void setTextLimit (int limit) { |
| checkWidget (); |
| if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO); |
| OS.TextBox_MaxLength (textHandle, limit); |
| } |
| |
| /** |
| * Sets the receiver's selection, minimum value, maximum |
| * value, digits, increment and page increment all at once. |
| * <p> |
| * Note: This is similar to setting the values individually |
| * using the appropriate methods, but may be implemented in a |
| * more efficient fashion on some platforms. |
| * </p> |
| * |
| * @param selection the new selection value |
| * @param minimum the new minimum value |
| * @param maximum the new maximum value |
| * @param digits the new digits value |
| * @param increment the new increment value |
| * @param pageIncrement the new pageIncrement 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 3.2 |
| */ |
| public void setValues (int selection, int minimum, int maximum, int digits, int increment, int pageIncrement) { |
| checkWidget (); |
| if (maximum <= minimum) return; |
| if (digits < 0) return; |
| if (increment < 1) return; |
| if (pageIncrement < 1) return; |
| selection = Math.min (Math.max (minimum, selection), maximum); |
| this.pageIncrement = pageIncrement; |
| this.increment = increment; |
| this.digits = digits; |
| this.min = minimum; |
| this.max = maximum; |
| setSelection (selection, true, true, false); |
| } |
| |
| void updateSelection (int delta) { |
| boolean [] parseFail = new boolean [1]; |
| int value = getSelectionText (parseFail); |
| if (parseFail [0]) value = this.value; |
| int newValue = value + delta; |
| if ((style & SWT.WRAP) != 0) { |
| if (newValue < min) newValue = max; |
| if (newValue > max) newValue = min; |
| } |
| newValue = Math.min (Math.max (min, newValue), max); |
| if (value != newValue) setSelection (newValue, true, true, true); |
| } |
| |
| String verifyText (String string, int start, int end) { |
| Event event = new Event (); |
| event.text = string; |
| event.start = start; |
| event.end = end; |
| if (string.length () == 1) { |
| event.character = string.charAt (0); |
| setInputState (event, SWT.KeyDown, 0, 0); |
| } |
| int index = 0; |
| if (digits > 0) { |
| String decimalSeparator = getDecimalSeparator (); |
| index = string.indexOf (decimalSeparator); |
| if (index != -1) { |
| string = string.substring (0, index) + string.substring (index + 1); |
| } |
| index = 0; |
| } |
| if (string.length() > 0) { |
| if (min < 0 && string.charAt (0) == '-') index++; |
| } |
| while (index < string.length ()) { |
| if (!Character.isDigit (string.charAt (index))) break; |
| index++; |
| } |
| event.doit = index == string.length (); |
| sendEvent (SWT.Verify, event); |
| if (!event.doit || isDisposed ()) return null; |
| return event.text; |
| } |
| |
| } |