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package org.eclipse.swt.widgets;
/*
* Licensed Materials - Property of IBM,
* (c) Copyright IBM Corp. 1998, 2001 All Rights Reserved
*/
import org.eclipse.swt.internal.photon.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
public abstract class Scrollable extends Control {
int scrolledHandle;
ScrollBar horizontalBar, verticalBar;
Scrollable () {
/* Do nothing */
}
public Scrollable (Composite parent, int style) {
super (parent, style);
}
void createScrollBars () {
/* Search the handle to find the scroll bars */
int child = OS.PtWidgetChildFront (handle);
while (child != 0) {
if (OS.PtWidgetClass (child) == OS.PtScrollbar ()) {
int [] args = {OS.Pt_ARG_ORIENTATION, 0, 0};
OS.PtGetResources (child, args.length / 3, args);
switch (args [1]) {
case OS.Pt_HORIZONTAL:
horizontalBar = new ScrollBar (this, SWT.HORIZONTAL, child);
break;
case OS.Pt_VERTICAL:
verticalBar = new ScrollBar (this, SWT.VERTICAL, child);
break;
}
}
child = OS.PtWidgetBrotherBehind (child);
}
}
void deregister () {
super.deregister ();
if (scrolledHandle != 0) WidgetTable.remove (scrolledHandle);
}
public Rectangle computeTrim (int x, int y, int width, int height) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
PhRect_t rect = new PhRect_t ();
PhArea_t area = new PhArea_t ();
rect.ul_x = (short) x;
rect.ul_y = (short) y;
rect.lr_x = (short) (x + width - 1);
rect.lr_y = (short) (y + height - 1);
OS.PtSetAreaFromWidgetCanvas (scrolledHandle != 0 ? scrolledHandle : handle, rect, area);
if (horizontalBar != null && horizontalBar.getVisible ()) {
Point size = horizontalBar.getSize ();
area.size_h += size.y;
}
if (verticalBar != null && verticalBar.getVisible ()) {
Point size = verticalBar.getSize ();
area.size_w += size.x;
}
return new Rectangle (area.pos_x, area.pos_y, area.size_w, area.size_h);
}
public Rectangle getClientArea () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
PhRect_t rect = new PhRect_t ();
int vParent = OS.PtValidParent (handle, OS.PtContainer ());
if (!OS.PtWidgetIsRealized (handle)) OS.PtExtentWidgetFamily (handle);
OS.PtCalcCanvas (vParent, rect);
int width = rect.lr_x - rect.ul_x + 1;
int height = rect.lr_y - rect.ul_y + 1;
return new Rectangle (0, 0, width, height);
}
public ScrollBar getHorizontalBar () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
return horizontalBar;
}
public ScrollBar getVerticalBar () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
return verticalBar;
}
void releaseHandle () {
super.releaseHandle ();
scrolledHandle = 0;
}
void resizeClientArea () {
/* Do nothing */
}
void releaseWidget () {
if (horizontalBar != null) horizontalBar.releaseWidget ();
if (verticalBar != null) verticalBar.releaseWidget ();
horizontalBar = verticalBar = null;
super.releaseWidget ();
}
void register () {
super.register ();
if (scrolledHandle != 0) WidgetTable.put (scrolledHandle, this);
}
int topHandle () {
if (scrolledHandle == 0) return handle;
return scrolledHandle;
}
}
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