| package org.eclipse.swt.widgets;
|
|
|
| /*
|
| * (c) Copyright IBM Corp. 2000, 2001.
|
| * All Rights Reserved
|
| */
|
|
|
| import org.eclipse.swt.internal.motif.*;
|
| import org.eclipse.swt.*;
|
| import org.eclipse.swt.graphics.*;
|
|
|
| /** |
| * Instances of the receiver represent is an unselectable |
| * user interface object that is used to display progress, |
| * typically in the form of a bar. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>SMOOTH, HORIZONTAL, VERTICAL</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * IMPORTANT: This class is intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </p> |
| */
|
|
|
| public /*final*/ class ProgressBar extends Control {
|
| /**
|
| * Creates a new instance of the widget.
|
| */
|
| public ProgressBar (Composite parent, int style) {
|
| /**
|
| * Feature in Motif. If you set the progress bar's value to 0,
|
| * the thumb does not disappear. In order to make this happen,
|
| * we hide the widget when the value is set to zero by changing
|
| * its colors to render it invisible, which means that it
|
| * would not visible unless a border is present. The fix is to
|
| * always ensure that there is a border, which will be drawn
|
| * even when the value is 0.
|
| */
|
| super (parent, checkStyle (style | SWT.BORDER));
|
| }
|
| static int checkStyle (int style) {
|
| return checkBits (style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0);
|
| }
|
| public Point computeSize (int wHint, int hHint, boolean changed) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| int border = getBorderWidth ();
|
| int width = border * 2, height = border * 2;
|
| Display display = getDisplay ();
|
| int hScroll = display.scrolledMarginX;
|
| int vScroll = display.scrolledMarginY;
|
| if ((style & SWT.HORIZONTAL) != 0) {
|
| width += hScroll * 10;
|
| height += vScroll;
|
| } else {
|
| width += hScroll;
|
| height += vScroll * 10;
|
| }
|
| if (wHint != SWT.DEFAULT) width = wHint + (border * 2);
|
| if (hHint != SWT.DEFAULT) height = hHint + (border * 2);
|
| return new Point (width, height);
|
| }
|
| void createHandle (int index) {
|
| state |= HANDLE;
|
| int background = defaultBackground ();
|
| int parentHandle = parent.handle;
|
| int [] argList = {
|
| OS.XmNshowArrows, 0,
|
| OS.XmNsliderSize, 1,
|
| OS.XmNtraversalOn, 0,
|
| OS.XmNtroughColor, background,
|
| OS.XmNtopShadowColor, background,
|
| OS.XmNbottomShadowColor, background,
|
| OS.XmNshadowThickness, 1,
|
| OS.XmNborderWidth, (style & SWT.BORDER) != 0 ? 1 : 0,
|
| OS.XmNorientation, ((style & SWT.H_SCROLL) != 0) ? OS.XmHORIZONTAL : OS.XmVERTICAL,
|
| OS.XmNprocessingDirection, ((style & SWT.H_SCROLL) != 0) ? OS.XmMAX_ON_RIGHT : OS.XmMAX_ON_TOP,
|
| OS.XmNancestorSensitive, 1,
|
| };
|
| handle = OS.XmCreateScrollBar (parentHandle, null, argList, argList.length / 2);
|
| if (handle == 0) error (SWT.ERROR_NO_HANDLES);
|
| } |
| void disableButtonPress () { |
| int xWindow = OS.XtWindow (handle); |
| if (xWindow == 0) return; |
| int xDisplay = OS.XtDisplay (handle); |
| if (xDisplay == 0) return; |
| int event_mask = OS.XtBuildEventMask (handle); |
| XSetWindowAttributes attributes = new XSetWindowAttributes (); |
| attributes.event_mask = event_mask & ~OS.ButtonPressMask; |
| OS.XChangeWindowAttributes (xDisplay, xWindow, OS.CWEventMask, attributes); |
| } |
| void disableTraversal () { |
| int [] argList = {OS.XmNtraversalOn, 0}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| }
|
| /** |
| * 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 () {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| 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 () {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| int [] argList = {OS.XmNminimum, 0};
|
| OS.XtGetValues (handle, argList, argList.length / 2);
|
| return argList [1];
|
| }
|
| /** |
| * Returns the single <em>selection</em> that 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 () {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| int [] argList = {
|
| OS.XmNminimum, 0,
|
| OS.XmNsliderSize, 0,
|
| OS.XmNbackground, 0,
|
| };
|
| OS.XtGetValues (handle, argList, argList.length / 2);
|
| int minimum = argList [1], sliderSize = argList [3], background = argList [5];
|
| if (sliderSize == 1 && background == defaultBackground()) sliderSize = 0;
|
| return minimum + sliderSize;
|
| } |
| void propagateWidget (boolean enabled) { |
| super.propagateWidget (enabled); |
| /* |
| * ProgressBars never participate in focus traversal when |
| * either enabled or disabled. Also, when enabled |
| */ |
| if (enabled) { |
| disableTraversal (); |
| disableButtonPress (); |
| } |
| }
|
| void realizeChildren () {
|
| super.realizeChildren (); |
| disableButtonPress ();
|
| }
|
| /** |
| * Sets the maximum value which the receiver will allow |
| * to be the argument which must be greater than or |
| * equal to zero. |
| * |
| * @param value the new maximum (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 setMaximum (int value) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (value < 0) return;
|
| int [] argList = {OS.XmNmaximum, value, OS.XmNvalue, 0};
|
| Display display = getDisplay ();
|
| boolean warnings = display.getWarnings ();
|
| display.setWarnings (false);
|
| OS.XtSetValues (handle, argList, argList.length / 2);
|
| display.setWarnings (warnings);
|
| }
|
| /** |
| * Sets the minimum value which the receiver will allow |
| * to be the argument which must be greater than or |
| * equal to zero. |
| * |
| * @param value the new minimum (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 setMinimum (int value) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (value < 0) return;
|
| int [] argList = {
|
| OS.XmNminimum, 0,
|
| OS.XmNmaximum, 0,
|
| OS.XmNsliderSize, 0,
|
| OS.XmNvalue, 0,
|
| };
|
| OS.XtGetValues (handle, argList, argList.length / 2);
|
| int minimum = argList [1];
|
| int maximum = argList [3];
|
| int sliderSize = argList [5];
|
|
|
| if (value >= maximum) return;
|
| int selection = sliderSize + minimum;
|
| if (value > selection) selection = value;
|
| argList [1] = value;
|
| argList [7] = value;
|
| Display display = getDisplay ();
|
| boolean warnings = display.getWarnings ();
|
| display.setWarnings (false);
|
| OS.XtSetValues (handle, argList, argList.length / 2);
|
| display.setWarnings (warnings);
|
| setThumb(selection - value);
|
| }
|
| /** |
| * Sets the single <em>selection</em> that is the receiver's |
| * position to the argument which must be greater than or equal |
| * to zero. |
| * |
| * @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) {
|
| if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
|
| if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
|
| if (value < 0) return;
|
| int [] argList = {
|
| OS.XmNminimum, 0,
|
| OS.XmNmaximum, 0,
|
| };
|
| OS.XtGetValues (handle, argList, argList.length / 2);
|
| int minimum = argList [1];
|
| int maximum = argList [3];
|
|
|
| int selection = value;
|
| if (selection < minimum) selection = minimum;
|
| if (selection > maximum) selection = maximum;
|
| setThumb(selection - minimum);
|
| }
|
| void setThumb (int sliderSize) {
|
| Display display = getDisplay ();
|
| int backgroundPixel = defaultBackground ();
|
| int [] argList1 = new int [] {OS.XmNbackground, 0};
|
| OS.XtGetValues (handle, argList1, argList1.length / 2);
|
| if (sliderSize == 0) {
|
| if (argList1 [1] != backgroundPixel) {
|
| OS.XmChangeColor (handle, backgroundPixel);
|
| }
|
| } else {
|
| if (argList1 [1] != display.listForeground) {
|
| OS.XmChangeColor (handle, display.listForeground);
|
| }
|
| }
|
| int [] argList2 = new int [] {
|
| OS.XmNsliderSize, (sliderSize == 0) ? 1 : sliderSize,
|
| OS.XmNtroughColor, backgroundPixel,
|
| OS.XmNtopShadowColor, backgroundPixel,
|
| OS.XmNbottomShadowColor, backgroundPixel,
|
| };
|
| boolean warnings = display.getWarnings ();
|
| display.setWarnings (false);
|
| OS.XtSetValues (handle, argList2, argList2.length / 2);
|
| display.setWarnings (warnings);
|
| }
|
| }
|