--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/javauis/eswt_qt/org.eclipse.swt/Eclipse SWT/qt/org/eclipse/swt/widgets/ScrollBar.java Mon May 03 12:27:20 2010 +0300
@@ -0,0 +1,908 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 IBM Corporation and others.
+ * Portion Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+ * 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
+ * Nokia Corporation - Qt implementation
+ *******************************************************************************/
+package org.eclipse.swt.widgets;
+
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.SWTException;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.events.SelectionListener;
+import org.eclipse.swt.graphics.Point;
+import org.eclipse.swt.internal.qt.OS;
+import org.eclipse.swt.internal.qt.WidgetState;
+
+/**
+ * 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
+ */
+public class ScrollBar extends Widget {
+ Scrollable parent;
+ /*
+ * In QT, thumb'size and page increment are the same thing. Setting page
+ * increment with a value other than thumb's size would ruins the
+ * consistency of scrollbar. So, page increment value is only stored in java
+ * side and does not affect native scrollbar
+ */
+ int pageIncrement = 1;
+
+ int eventDetail = SWT.NONE;
+
+ ScrollBar(Scrollable parent, int style) {
+ super(parent,
+ checkBits(style, SWT.HORIZONTAL, SWT.VERTICAL, 0, 0, 0, 0));
+ this.parent = parent;
+ checkOrientation(parent);
+ createWidget(0);
+ }
+
+ void createHandle_pp(int index) {
+ if (parent.scrollAreaHandle == 0)
+ SWT.error(SWT.ERROR_NULL_ARGUMENT);
+
+ if ((style & SWT.H_SCROLL) != 0) {
+ handle = OS.QAbstractScrollArea_horizontalScrollBar(parent.scrollAreaHandle);
+ } else {
+ handle = OS.QAbstractScrollArea_verticalScrollBar(parent.scrollAreaHandle);
+ }
+
+ if (handle == 0) {
+ SWT.error(SWT.ERROR_UNSPECIFIED);
+ }
+ topHandle = handle;
+ state |= WidgetState.HANDLE;
+ }
+
+ void releaseParent_pp() {
+ super.releaseParent_pp();
+
+ if (parent.horizontalBar == this) {
+ OS.QAbstractScrollArea_setHorizontalScrollBarPolicy(
+ parent.scrollAreaHandle, OS.QT_SCROLLBARALWAYSOFF);
+ parent.horizontalBar = null;
+ } else if (parent.verticalBar == this) {
+ OS.QAbstractScrollArea_setVerticalScrollBarPolicy(
+ parent.scrollAreaHandle, OS.QT_SCROLLBARALWAYSOFF);
+ parent.verticalBar = null;
+ }
+ }
+
+ void destroyWidget() {
+ releaseHandle_pp();
+ /*
+ * no need to delete native scrollbar since ScrollBar does not own
+ * native scrollbar
+ */
+ }
+
+ void releaseWidget_pp() {
+ super.releaseWidget_pp();
+ parent = null;
+ }
+
+ /**
+ * 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);
+ }
+
+ /**
+ * 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);
+ }
+
+ /**
+ * 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();
+ return OS.QAbstractSlider_singleStep(handle);
+ }
+
+ /**
+ * 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 OS.QAbstractSlider_maximum(handle)
+ + OS.QAbstractSlider_pageStep(handle);
+ }
+
+ /**
+ * 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 OS.QAbstractSlider_minimum(handle);
+ }
+
+ /**
+ * 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();
+ return pageIncrement;
+ }
+
+ /**
+ * 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();
+ return OS.QAbstractSlider_value(handle);
+ }
+
+ /**
+ * 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();
+ if(!isVisible()) parent.updateQLayouts();
+ return OS.QWidget_frameSize(handle);
+ }
+
+ /**
+ * Returns the size of the receiver's thumb relative to the difference
+ * between its maximum and minimum values.
+ *
+ * @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();
+ return OS.QAbstractSlider_pageStep(handle);
+ }
+
+ /**
+ * 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();
+ return OS.QWidget_isEnabled(handle);
+ }
+
+ /**
+ * 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.QWidget_isVisible(handle);
+ }
+
+ /**
+ * 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 OS.QWidget_isEnabled(handle) && 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 OS.QWidget_isVisible(handle) && parent.isVisible();
+ }
+
+ /**
+ * 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();
+ if (enabled) {
+ state &= ~WidgetState.DISABLED;
+ } else {
+ state |= WidgetState.DISABLED;
+ }
+ OS.QWidget_setEnabled(handle, enabled);
+ }
+
+ /**
+ * 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;
+ }
+ OS.QAbstractSlider_setSingleStep(handle, value);
+ }
+
+ /**
+ * Sets the maximum. If this value is negative or less than or equal to the
+ * minimum, the value is ignored. If necessary, 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 min = OS.QAbstractSlider_minimum(handle);
+ if (value <= min)
+ return;
+
+ int qMaxValue = value - OS.QAbstractSlider_pageStep(handle);
+ if (qMaxValue < min) {
+ /*
+ * thumb is too big to fit between minimum and maximum shrink thumb
+ */
+ OS.QAbstractSlider_setPageStep(handle, value - min);
+ /*
+ * adjust maximum value
+ */
+ qMaxValue = min;
+ }
+
+ if (OS.QAbstractSlider_value(handle) > qMaxValue) {
+ /*
+ * adjust selection
+ */
+ OS.QAbstractSlider_setValue(handle, qMaxValue);
+ }
+ OS.QAbstractSlider_setMaximum(handle, qMaxValue);
+
+ }
+
+ /**
+ * 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 qMax = OS.QAbstractSlider_maximum(handle);
+ int pageStep = OS.QAbstractSlider_pageStep(handle);
+ if (value >= (qMax + pageStep)) {
+ return;
+ }
+
+ if ((qMax + pageStep - value) < pageStep) {
+ /*
+ * thumb is too big to fit between minimum and maximum shrink thumb
+ */
+ OS.QAbstractSlider_setPageStep(handle, qMax + pageStep - value);
+ /*
+ * adjust qt maximum value
+ */
+ OS.QAbstractSlider_setMaximum(handle, value);
+ }
+
+ if (OS.QAbstractSlider_value(handle) < value) {
+ /*
+ * adjust selection
+ */
+ OS.QAbstractSlider_setValue(handle, value);
+ }
+ OS.QAbstractSlider_setMinimum(handle, value);
+ }
+
+ /**
+ * 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;
+ }
+ /*
+ * In QT, thumb'size and page increment are the same thing. Setting page
+ * increment with a value other than thumb's size would ruins the
+ * consistency of scrollbar. So, this API only stores value in java side
+ * and does not change anything to native scrollbar
+ */
+ pageIncrement = value;
+ }
+
+ /**
+ * 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 value) {
+ checkWidget();
+ int min = OS.QAbstractSlider_minimum(handle);
+ if (value < min) {
+ value = min;
+ } else {
+ int max = OS.QAbstractSlider_maximum(handle);
+ if (value > max) {
+ value = max;
+ }
+ }
+ OS.QAbstractSlider_setValue(handle, value);
+ }
+
+ /**
+ * Sets the size of the receiver's thumb relative to the difference between
+ * its maximum and minimum values. This new value will be ignored if it is
+ * less than one, and will be clamped if it exceeds the receiver's current
+ * range.
+ *
+ * @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 pageStep = OS.QAbstractSlider_pageStep(handle);
+ if (value == pageStep)
+ return;
+
+ int qMax = OS.QAbstractSlider_maximum(handle);
+ int range = qMax + pageStep - OS.QAbstractSlider_minimum(handle);
+ if (value > range) {
+ /*
+ * decrease thumb value
+ */
+ value = range;
+ }
+ int newQMaximum = qMax - (value - pageStep);
+ if (OS.QAbstractSlider_value(handle) > newQMaximum) {
+ /*
+ * decrease selection value
+ */
+ OS.QAbstractSlider_setValue(handle, newQMaximum);
+ }
+
+ OS.QAbstractSlider_setPageStep(handle, value);
+
+ /*
+ * adjust maximum value
+ */
+ OS.QAbstractSlider_setMaximum(handle, newQMaximum);
+
+ }
+
+ /**
+ * 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) {
+ OS.QAbstractSlider_setMinimum(handle, minimum);
+ } else {
+ minimum = OS.QAbstractSlider_minimum(handle);
+ }
+
+ int oldThumb = OS.QAbstractSlider_pageStep(handle);
+ boolean validMaximum = true;
+ if (maximum <= minimum) {
+ validMaximum = false;
+ maximum = OS.QAbstractSlider_maximum(handle) + oldThumb;
+ }
+
+ if (thumb > 0) {
+ if (thumb > maximum - minimum) {
+ /*
+ * decrease thumb size
+ */
+ thumb = maximum - minimum;
+ }
+ OS.QAbstractSlider_setPageStep(handle, thumb);
+ } else if (oldThumb > maximum - minimum) {
+ /*
+ * Thumb value itself is ignored. But Thumb needs to be adjusted to
+ * fit maximum and minimum values
+ */
+ thumb = maximum - minimum;
+ OS.QAbstractSlider_setPageStep(handle, thumb);
+ } else {
+ /*
+ * Thumb value is ignored and current thumb size keeps unchanged
+ */
+ thumb = oldThumb;
+ }
+
+ if (validMaximum) {
+ OS.QAbstractSlider_setMaximum(handle, maximum - thumb);
+ }
+
+ if (selection < minimum) {
+ /*
+ * increase selection
+ */
+ selection = minimum;
+
+ } else if (selection > maximum - thumb) {
+ /*
+ * decrease selection
+ */
+ selection = maximum - thumb;
+ }
+
+ OS.QAbstractSlider_setValue(handle, selection);
+
+ if (increment > 0) {
+ OS.QAbstractSlider_setSingleStep(handle, increment);
+ }
+
+ if (pageIncrement > 0) {
+ this.pageIncrement = pageIncrement;
+ }
+ }
+
+ /**
+ * 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();
+ OS.QWidget_setVisible(handle, visible);
+ }
+
+ void hookEvents_pp() {
+ super.hookEvents_pp();
+ int signalProxy = OS.SignalHandler_new(handle, display,
+ OS.QSIGNAL_SLIDER_CHANGED);
+ OS.QObject_connectOrThrow(handle, "valueChanged(int)", signalProxy,
+ "widgetSignal(int)", OS.QT_AUTOCONNECTION);
+ signalProxy = OS.SignalHandler_new(handle, display,
+ OS.QSIGNAL_SLIDER_ACTION_TRIGGERED);
+ OS.QObject_connectOrThrow(handle, "actionTriggered(int)", signalProxy,
+ "widgetSignal(int)", OS.QT_AUTOCONNECTION);
+ signalProxy = OS.SignalHandler_new(handle, display,
+ OS.QSIGNAL_SLIDER_RELEASED);
+ OS.QObject_connectOrThrow(handle, "sliderReleased()", signalProxy,
+ "widgetSignal()", OS.QT_AUTOCONNECTION);
+ }
+
+ void qt_signal_slider_action_triggered(int action) {
+ switch (action) {
+ case OS.QT_SLIDERMOVE:
+ eventDetail = SWT.DRAG;
+ break;
+ case OS.QT_SLIDERTOMINIMUM:
+ eventDetail = SWT.HOME;
+ break;
+ case OS.QT_SLIDERTOMAXIMUM:
+ eventDetail = SWT.END;
+ break;
+ case OS.QT_SLIDERSINGLESTEPADD:
+ eventDetail = SWT.ARROW_DOWN;
+ break;
+ case OS.QT_SLIDERSINGLESTEPSUB:
+ eventDetail = SWT.ARROW_UP;
+ break;
+ case OS.QT_SLIDERPAGESTEPUSB:
+ eventDetail = SWT.PAGE_UP;
+ break;
+ case OS.QT_SLIDERPAGESTEPADD:
+ eventDetail = SWT.PAGE_DOWN;
+ break;
+ default:
+ eventDetail = SWT.NONE;
+ }
+ }
+
+ void qt_signal_slider_changed(int value) {
+ sendSelectionEvent(eventDetail);
+ eventDetail = SWT.NONE;
+ }
+
+ void qt_signal_slider_released() {
+ sendSelectionEvent(SWT.NONE);
+ }
+
+ void sendSelectionEvent(int detail) {
+ Event event = new Event();
+ event.widget = this;
+ event.detail = detail;
+ sendEvent(SWT.Selection, event, true);
+ }
+
+}