| /******************************************************************************* |
| * Copyright (c) 2000, 2009 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.internal.motif.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.events.*; |
| |
| /** |
| * Instances of this class are selectable user interface |
| * objects that represent a range of positive, numeric values. |
| * <p> |
| * At any given moment, a given scroll bar will have a |
| * single 'selection' that is considered to be its |
| * value, which is constrained to be within the range of |
| * values the scroll bar represents (that is, between its |
| * <em>minimum</em> and <em>maximum</em> values). |
| * </p><p> |
| * Typically, scroll bars will be made up of five areas: |
| * <ol> |
| * <li>an arrow button for decrementing the value</li> |
| * <li>a page decrement area for decrementing the value by a larger amount</li> |
| * <li>a <em>thumb</em> for modifying the value by mouse dragging</li> |
| * <li>a page increment area for incrementing the value by a larger amount</li> |
| * <li>an arrow button for incrementing the value</li> |
| * </ol> |
| * Based on their style, scroll bars are either <code>HORIZONTAL</code> |
| * (which have a left facing button for decrementing the value and a |
| * right facing button for incrementing it) or <code>VERTICAL</code> |
| * (which have an upward facing button for decrementing the value |
| * and a downward facing buttons for incrementing it). |
| * </p><p> |
| * On some platforms, the size of the scroll bar's thumb can be |
| * varied relative to the magnitude of the range of values it |
| * represents (that is, relative to the difference between its |
| * maximum and minimum values). Typically, this is used to |
| * indicate some proportional value such as the ratio of the |
| * visible area of a document to the total amount of space that |
| * it would take to display it. SWT supports setting the thumb |
| * size even if the underlying platform does not, but in this |
| * case the appearance of the scroll bar will not change. |
| * </p><p> |
| * Scroll bars are created by specifying either <code>H_SCROLL</code>, |
| * <code>V_SCROLL</code> or both when creating a <code>Scrollable</code>. |
| * They are accessed from the <code>Scrollable</code> using |
| * <code>getHorizontalBar</code> and <code>getVerticalBar</code>. |
| * </p><p> |
| * Note: Scroll bars are not Controls. On some platforms, scroll bars |
| * that appear as part of some standard controls such as a text or list |
| * have no operating system resources and are not children of the control. |
| * For this reason, scroll bars are treated specially. To create a control |
| * that looks like a scroll bar but has operating system resources, use |
| * <code>Slider</code>. |
| * </p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>HORIZONTAL, VERTICAL</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see Slider |
| * @see Scrollable |
| * @see Scrollable#getHorizontalBar |
| * @see Scrollable#getVerticalBar |
| * @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> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class ScrollBar extends Widget { |
| Scrollable parent; |
| boolean dragSent = false; |
| ScrollBar () { |
| /* Do Nothing */ |
| } |
| ScrollBar (Scrollable parent, int style) { |
| super (parent, checkStyle (style)); |
| this.parent = parent; |
| createWidget (0); |
| } |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the user changes the receiver's value, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * When <code>widgetSelected</code> is called, the event object detail field contains one of the following values: |
| * <code>SWT.NONE</code> - for the end of a drag. |
| * <code>SWT.DRAG</code>. |
| * <code>SWT.HOME</code>. |
| * <code>SWT.END</code>. |
| * <code>SWT.ARROW_DOWN</code>. |
| * <code>SWT.ARROW_UP</code>. |
| * <code>SWT.PAGE_DOWN</code>. |
| * <code>SWT.PAGE_UP</code>. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </p> |
| * |
| * @param listener the listener which should be notified when the user changes the receiver's value |
| * |
| * @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); |
| } |
| static int checkStyle (int style) { |
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0); |
| } |
| void createHandle (int index) { |
| int [] argList = { |
| OS.XmNancestorSensitive, 1, |
| OS.XmNborderWidth, (style & SWT.BORDER) != 0 ? 1 : 0, |
| OS.XmNorientation, ((style & SWT.H_SCROLL) != 0) ? OS.XmHORIZONTAL : OS.XmVERTICAL, |
| OS.XmNtraversalOn, 0, |
| }; |
| int parentHandle = parent.scrolledHandle; |
| handle = OS.XmCreateScrollBar (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| } |
| void destroyHandle () { |
| super.destroyWidget (); |
| } |
| void destroyWidget () { |
| parent.destroyScrollBar (this); |
| releaseHandle (); |
| //parent.sendEvent (SWT.Resize); |
| } |
| /** |
| * Returns <code>true</code> if the receiver is enabled, and |
| * <code>false</code> otherwise. A disabled control is typically |
| * not selectable from the user interface and draws with an |
| * inactive or "grayed" look. |
| * |
| * @return the receiver's enabled state |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #isEnabled |
| */ |
| public boolean getEnabled () { |
| checkWidget(); |
| int [] argList = {OS.XmNsensitive, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1] != 0; |
| } |
| /** |
| * Returns the amount that the receiver's value will be |
| * modified by when the up/down (or right/left) 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(); |
| int [] argList = {OS.XmNincrement, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1]; |
| } |
| /** |
| * 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(); |
| int [] argList = {OS.XmNmaximum, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1]; |
| } |
| /** |
| * 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(); |
| int [] argList = {OS.XmNminimum, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1]; |
| } |
| /** |
| * 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 <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(); |
| int [] argList = {OS.XmNpageIncrement, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1]; |
| } |
| /** |
| * Returns the receiver's parent, which must be a Scrollable. |
| * |
| * @return the receiver's parent |
| * |
| * @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 Scrollable getParent () { |
| checkWidget(); |
| return parent; |
| } |
| /** |
| * Returns the single 'selection' that is the receiver's value. |
| * |
| * @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(); |
| int [] argList = {OS.XmNvalue, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1]; |
| } |
| /** |
| * Returns a point describing the receiver's size. The |
| * x coordinate of the result is the width of the receiver. |
| * The y coordinate of the result is the height of the |
| * receiver. |
| * |
| * @return the receiver's size |
| * |
| * @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 Point getSize () { |
| checkWidget(); |
| int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int borders = argList [5] * 2; |
| return new Point (argList [1] + borders, argList [3] + borders); |
| } |
| /** |
| * Returns the receiver's thumb value. |
| * |
| * @return the thumb 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> |
| * |
| * @see ScrollBar |
| */ |
| public int getThumb () { |
| checkWidget(); |
| int [] argList = {OS.XmNsliderSize, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1]; |
| } |
| /** |
| * Returns a rectangle describing the size and location of the |
| * receiver's thumb relative to its parent. |
| * |
| * @return the thumb bounds, relative to the {@link #getParent() parent} |
| * |
| * @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 3.6 |
| */ |
| public Rectangle getThumbBounds () { |
| checkWidget(); |
| int [] argList = { |
| OS.XmNsliderSize, 0, //1 |
| OS.XmNwidth, 0, //3 |
| OS.XmNheight, 0, //5 |
| OS.XmNminimum, 0, //7 |
| OS.XmNmaximum, 0, //9 |
| OS.XmNvalue, 0, //11 |
| }; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| Rectangle rect; |
| if ((style & SWT.VERTICAL) != 0) { |
| int slideSize = argList [5], sliderSize, sliderPos; |
| if (slideSize > 2 * argList [3]) { |
| slideSize -= 2 * argList [3]; |
| float factor = (float)slideSize / (argList[9] - argList[7]); |
| sliderSize = (int)(0.5f + argList[1] * factor); |
| sliderPos = (int) (((argList[11] - argList[7]) * factor) + 0.5) + argList [3]; |
| } else { |
| sliderPos = slideSize / 2; |
| sliderSize = 0; |
| } |
| rect = new Rectangle(0, sliderPos, argList[3], sliderSize); |
| } else { |
| int slideSize = argList [3], sliderSize, sliderPos; |
| if (slideSize > 2 * argList [5]) { |
| slideSize -= 2 * argList [5]; |
| float factor = (float)slideSize / (argList[9] - argList[7]); |
| sliderSize = (int)(0.5f + argList[1] * factor); |
| sliderPos = (int) (((argList[11] - argList[7]) * factor) + 0.5) + argList [5]; |
| } else { |
| sliderPos = slideSize / 2; |
| sliderSize = 0; |
| } |
| rect = new Rectangle(sliderPos, 0, sliderSize, argList[5]); |
| } |
| short [] root_x = new short [1], root_y = new short [1]; |
| OS.XtTranslateCoords (handle, (short) rect.x, (short) rect.y, root_x, root_y); |
| rect.x = root_x [0]; |
| rect.y = root_y [0]; |
| OS.XtTranslateCoords (parent.handle, (short) 0, (short) 0, root_x, root_y); |
| rect.x -= root_x [0]; |
| rect.y -= root_y [0]; |
| return rect; |
| } |
| /** |
| * Returns a rectangle describing the size and location of the |
| * receiver's thumb track relative to its parent. This rectangle |
| * comprises the areas 2, 3, and 4 as described in {@link ScrollBar}. |
| * |
| * @return the thumb track bounds, relative to the {@link #getParent() parent} |
| * |
| * @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 3.6 |
| */ |
| public Rectangle getThumbTrackBounds () { |
| checkWidget(); |
| int [] argList = { |
| OS.XmNwidth, 0, //1 |
| OS.XmNheight, 0, //3 |
| }; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| Rectangle rect; |
| if ((style & SWT.VERTICAL) != 0) { |
| int slideSize = argList [3], slidePos; |
| if (slideSize > 2 * argList [1]) { |
| slidePos = argList [1]; |
| slideSize -= 2 * (argList [1]); |
| } else { |
| slidePos = slideSize / 2; |
| slideSize = 0; |
| } |
| rect = new Rectangle(0, slidePos, argList[1], slideSize); |
| } else { |
| int slideSize = argList [1], slidePos; |
| if (slideSize > 2 * argList [3]) { |
| slidePos = argList [3]; |
| slideSize -= 2 * (argList [3]); |
| } else { |
| slidePos = slideSize / 2; |
| slideSize = 0; |
| } |
| rect = new Rectangle(slidePos, 0, slideSize, argList[3]); |
| } |
| short [] root_x = new short [1], root_y = new short [1]; |
| OS.XtTranslateCoords (handle, (short) rect.x, (short) rect.y, root_x, root_y); |
| rect.x = root_x [0]; |
| rect.y = root_y [0]; |
| OS.XtTranslateCoords (parent.handle, (short) 0, (short) 0, root_x, root_y); |
| rect.x -= root_x [0]; |
| rect.y -= root_y [0]; |
| return rect; |
| } |
| /** |
| * Returns <code>true</code> if the receiver is visible, and |
| * <code>false</code> otherwise. |
| * <p> |
| * If one of the receiver's ancestors is not visible or some |
| * other condition makes the receiver not visible, this method |
| * may still indicate that it is considered visible even though |
| * it may not actually be showing. |
| * </p> |
| * |
| * @return the receiver's visibility state |
| * |
| * @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 boolean getVisible () { |
| checkWidget(); |
| return OS.XtIsManaged (handle); |
| } |
| void hookEvents () { |
| int windowProc = display.windowProc; |
| OS.XtAddCallback (handle, OS.XmNvalueChangedCallback, windowProc, VALUE_CHANGED_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNdragCallback, windowProc, DRAG_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNtoBottomCallback, windowProc, TO_BOTTOM_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNtoTopCallback, windowProc, TO_TOP_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNincrementCallback, windowProc, INCREMENT_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNdecrementCallback, windowProc, DECREMENT_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNpageIncrementCallback, windowProc, PAGE_INCREMENT_CALLBACK); |
| OS.XtAddCallback (handle, OS.XmNpageDecrementCallback, windowProc, PAGE_DECREMENT_CALLBACK); |
| OS.XtAddEventHandler (handle, OS.ButtonPressMask, false, windowProc, BUTTON_PRESS); |
| } |
| /** |
| * Returns <code>true</code> if the receiver is enabled and all |
| * of the receiver's ancestors are enabled, and <code>false</code> |
| * otherwise. A disabled control is typically not selectable from the |
| * user interface and draws with an inactive or "grayed" look. |
| * |
| * @return the receiver's enabled state |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| * |
| * @see #getEnabled |
| */ |
| public boolean isEnabled () { |
| checkWidget(); |
| return getEnabled () && parent.isEnabled (); |
| } |
| /** |
| * Returns <code>true</code> if the receiver is visible and all |
| * of the receiver's ancestors are visible and <code>false</code> |
| * otherwise. |
| * |
| * @return the receiver's visibility state |
| * |
| * @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 #getVisible |
| */ |
| public boolean isVisible () { |
| checkWidget(); |
| return getVisible () && parent.isVisible (); |
| } |
| void manageChildren () { |
| /* |
| * Feature in Motif. Hiding or showing a scroll bar |
| * can cause the widget to automatically resize in |
| * the OS. This behavior is unwanted. The fix is |
| * to force the widget to resize to original size. |
| */ |
| int scrolledHandle = parent.scrolledHandle; |
| int [] argList = {OS.XmNwidth, 0, OS.XmNheight, 0, OS.XmNborderWidth, 0}; |
| if (scrolledHandle != 0) { |
| OS.XtGetValues (scrolledHandle, argList, argList.length / 2); |
| } |
| OS.XtManageChild (handle); |
| /* |
| * Feature in Motif. When XtSetValues() is used to restore the width and |
| * height of the widget, the new width and height are sometimes ignored. |
| * The fix is to use XtResizeWidget(). |
| */ |
| if (scrolledHandle != 0) { |
| OS.XtResizeWidget (scrolledHandle, argList [1], argList [3], argList [5]); |
| } |
| } |
| void propagateWidget (boolean enabled) { |
| propagateHandle (enabled, handle, OS.None); |
| } |
| void releaseHandle () { |
| super.releaseHandle (); |
| parent = null; |
| } |
| void releaseParent () { |
| super.releaseParent (); |
| if (parent.horizontalBar == this) parent.horizontalBar = null; |
| if (parent.verticalBar == this) parent.verticalBar = null; |
| } |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the user changes the receiver's value. |
| * |
| * @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); |
| } |
| void sendScrollEvent (int detail) { |
| Event event = new Event (); |
| event.detail = detail; |
| sendEvent (SWT.Selection, event); |
| /* |
| * Feature in Motif. When a scroll bar is selected, |
| * it does not make the shell active. The fix is to |
| * make the shell active. |
| */ |
| Shell shell = parent.getShell (); |
| shell.bringToTop (true); |
| } |
| /** |
| * Enables the receiver if the argument is <code>true</code>, |
| * and disables it otherwise. A disabled control is typically |
| * not selectable from the user interface and draws with an |
| * inactive or "grayed" look. |
| * |
| * @param enabled the new enabled state |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public void setEnabled (boolean enabled) { |
| checkWidget(); |
| int [] argList = {OS.XmNsensitive, enabled ? 1 : 0}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /** |
| * 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 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; |
| int [] argList = {OS.XmNincrement, value}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /** |
| * Sets the maximum. If this value is negative or less than or |
| * equal to the minimum, the value is ignored. If necessary, first |
| * the thumb and then the selection are adjusted to fit within the |
| * new range. |
| * |
| * @param value the new 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 setMaximum (int value) { |
| checkWidget(); |
| if (value < 0) return; |
| int [] argList = {OS.XmNmaximum, value}; |
| boolean warnings = display.getWarnings (); |
| display.setWarnings (false); |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| display.setWarnings (warnings); |
| } |
| /** |
| * Sets the minimum value. If this value is negative or greater |
| * than or equal to the maximum, the value is ignored. If necessary, |
| * first the thumb and then the selection are adjusted to fit within |
| * the new range. |
| * |
| * @param value the new 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 setMinimum (int value) { |
| checkWidget(); |
| if (value < 0) return; |
| int [] argList = { |
| OS.XmNminimum, 0, |
| OS.XmNmaximum, 0, |
| OS.XmNsliderSize, 0, |
| }; |
| /* |
| * Feature in Motif. For some reason, when minimium |
| * is set to be greater than or equal to maximum, Motif |
| * does not set the minimum. Instead, the value is |
| * changed and the minimum stays the same. This behavior |
| * differs from setting the maximum where the slider size |
| * is always decreased to make room for the new maximum. |
| * The fix is to decrease the slider to make room for |
| * the new minimum. |
| */ |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (argList [3] - value - argList [5] < 0) { |
| argList [5] = argList [3] - value; |
| } |
| argList [1] = value; |
| boolean warnings = display.getWarnings (); |
| display.setWarnings (false); |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| display.setWarnings (warnings); |
| } |
| /** |
| * 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 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; |
| int [] argList = {OS.XmNpageIncrement, value}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| /** |
| * Sets the single <em>selection</em> that is the receiver's |
| * value to the argument which must be greater than or equal |
| * to zero. |
| * |
| * @param selection 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 selection) { |
| checkWidget(); |
| int [] argList = {OS.XmNvalue, selection}; |
| boolean warnings = display.getWarnings (); |
| display.setWarnings (false); |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| display.setWarnings (warnings); |
| } |
| /** |
| * Sets the thumb value. The thumb value should be used to represent |
| * the size of the visual portion of the current range. This value is |
| * usually the same as the page increment value. |
| * <p> |
| * This new value will be ignored if it is less than one, and will be |
| * clamped if it exceeds the receiver's current range. |
| * </p> |
| * |
| * @param value the new thumb value, which must be at least one and not |
| * larger than the size of the current range |
| * |
| * @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 setThumb (int value) { |
| checkWidget(); |
| if (value < 1) return; |
| int [] argList = {OS.XmNminimum, 0, OS.XmNmaximum, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| value = Math.min (value, argList [3] - argList [1]); |
| int [] argList2 = {OS.XmNsliderSize, value}; |
| boolean warnings = display.getWarnings (); |
| display.setWarnings (false); |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| display.setWarnings (warnings); |
| } |
| /** |
| * Sets the receiver's selection, minimum value, maximum |
| * value, thumb, 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 thumb the new thumb 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> |
| */ |
| public void setValues (int selection, int minimum, int maximum, int thumb, int increment, int pageIncrement) { |
| checkWidget(); |
| if (minimum < 0) return; |
| if (maximum < 0) return; |
| if (thumb < 1) return; |
| if (increment < 1) return; |
| if (pageIncrement < 1) return; |
| thumb = Math.min (thumb, maximum - minimum); |
| int [] argList = { |
| OS.XmNvalue, selection, |
| OS.XmNminimum, minimum, |
| OS.XmNmaximum, maximum, |
| OS.XmNsliderSize, thumb, |
| OS.XmNincrement, increment, |
| OS.XmNpageIncrement, pageIncrement, |
| }; |
| boolean warnings = display.getWarnings (); |
| display.setWarnings (false); |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| display.setWarnings (warnings); |
| } |
| /** |
| * Marks the receiver as visible if the argument is <code>true</code>, |
| * and marks it invisible otherwise. |
| * <p> |
| * If one of the receiver's ancestors is not visible or some |
| * other condition makes the receiver not visible, marking |
| * it visible may not actually cause it to be displayed. |
| * </p> |
| * |
| * @param visible the new visibility state |
| * |
| * @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 setVisible (boolean visible) { |
| checkWidget(); |
| if (parent.setScrollBarVisible (this, visible)) { |
| sendEvent (visible ? SWT.Show : SWT.Hide); |
| parent.sendEvent (SWT.Resize); |
| } |
| } |
| int XButtonPress (int w, int client_data, int call_data, int continue_to_dispatch) { |
| int result = super.XButtonPress (w, client_data, call_data, continue_to_dispatch); |
| if (result != 0) return result; |
| dragSent = false; |
| return result; |
| } |
| int XmNdecrementCallback (int w, int client_data, int call_data) { |
| sendScrollEvent (SWT.ARROW_UP); |
| return 0; |
| } |
| int XmNdragCallback (int w, int client_data, int call_data) { |
| dragSent = true; |
| sendScrollEvent (SWT.DRAG); |
| return 0; |
| } |
| int XmNincrementCallback (int w, int client_data, int call_data) { |
| sendScrollEvent (SWT.ARROW_DOWN); |
| return 0; |
| } |
| int XmNpageDecrementCallback (int w, int client_data, int call_data) { |
| sendScrollEvent (SWT.PAGE_UP); |
| return 0; |
| } |
| int XmNpageIncrementCallback (int w, int client_data, int call_data) { |
| sendScrollEvent (SWT.PAGE_DOWN); |
| return 0; |
| } |
| int XmNtoBottomCallback (int w, int client_data, int call_data) { |
| sendScrollEvent (SWT.END); |
| return 0; |
| } |
| int XmNtoTopCallback (int w, int client_data, int call_data) { |
| sendScrollEvent (SWT.HOME); |
| return 0; |
| } |
| int XmNvalueChangedCallback (int w, int client_data, int call_data) { |
| if (!dragSent){ |
| sendScrollEvent (SWT.DRAG); |
| dragSent = false; |
| } |
| sendScrollEvent (SWT.NONE); |
| return 0; |
| } |
| } |