/*******************************************************************************
* 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.win32.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.events.*;
/**
* Instances of this class support the layout of selectable
* expand bar items.
* <p>
* The item children that may be added to instances of this class
* must be of type <code>ExpandItem</code>.
* </p><p>
* <dl>
* <dt><b>Styles:</b></dt>
* <dd>V_SCROLL</dd>
* <dt><b>Events:</b></dt>
* <dd>Expand, Collapse</dd>
* </dl>
* </p><p>
* IMPORTANT: This class is <em>not</em> intended to be subclassed.
* </p>
*
* @see ExpandItem
* @see ExpandEvent
* @see ExpandListener
* @see ExpandAdapter
* @see <a href="http://www.eclipse.org/swt/snippets/#expandbar">ExpandBar 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 3.2
* @noextend This class is not intended to be subclassed by clients.
*/
public class ExpandBar extends Composite {
ExpandItem[] items;
int itemCount;
ExpandItem focusItem;
int spacing = 4;
int yCurrentScroll;
int /*long*/ hFont;
/**
* 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#V_SCROLL
* @see Widget#checkSubclass
* @see Widget#getStyle
*/
public ExpandBar (Composite parent, int style) {
super (parent, checkStyle (style));
}
/**
* Adds the listener to the collection of listeners who will
* be notified when an item in the receiver is expanded or collapsed
* by sending it one of the messages defined in the <code>ExpandListener</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 ExpandListener
* @see #removeExpandListener
*/
public void addExpandListener (ExpandListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener (listener);
addListener (SWT.Expand, typedListener);
addListener (SWT.Collapse, typedListener);
}
int /*long*/ callWindowProc (int /*long*/ hwnd, int msg, int /*long*/ wParam, int /*long*/ lParam) {
if (handle == 0) return 0;
return OS.DefWindowProc (hwnd, msg, wParam, lParam);
}
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
static int checkStyle (int style) {
style &= ~SWT.H_SCROLL;
return style | SWT.NO_BACKGROUND;
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget ();
int height = 0, width = 0;
if (wHint == SWT.DEFAULT || hHint == SWT.DEFAULT) {
if (itemCount > 0) {
int /*long*/ hDC = OS.GetDC (handle);
int /*long*/ hTheme = 0;
if (isAppThemed ()) {
hTheme = display.hExplorerBarTheme ();
}
int /*long*/ hCurrentFont = 0, oldFont = 0;
if (hTheme == 0) {
if (hFont != 0) {
hCurrentFont = hFont;
} else {
if (!OS.IsWinCE) {
NONCLIENTMETRICS info = OS.IsUnicode ? (NONCLIENTMETRICS) new NONCLIENTMETRICSW () : new NONCLIENTMETRICSA ();
info.cbSize = NONCLIENTMETRICS.sizeof;
if (OS.SystemParametersInfo (OS.SPI_GETNONCLIENTMETRICS, 0, info, 0)) {
LOGFONT logFont = OS.IsUnicode ? (LOGFONT) ((NONCLIENTMETRICSW)info).lfCaptionFont : ((NONCLIENTMETRICSA)info).lfCaptionFont;
hCurrentFont = OS.CreateFontIndirect (logFont);
}
}
}
if (hCurrentFont != 0) {
oldFont = OS.SelectObject (hDC, hCurrentFont);
}
}
height += spacing;
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items [i];
height += item.getHeaderHeight ();
if (item.expanded) height += item.height;
height += spacing;
width = Math.max (width, item.getPreferredWidth (hTheme, hDC));
}
if (hCurrentFont != 0) {
OS.SelectObject (hDC, oldFont);
if (hCurrentFont != hFont) OS.DeleteObject (hCurrentFont);
}
OS.ReleaseDC (handle, hDC);
}
}
if (width == 0) width = DEFAULT_WIDTH;
if (height == 0) height = DEFAULT_HEIGHT;
if (wHint != SWT.DEFAULT) width = wHint;
if (hHint != SWT.DEFAULT) height = hHint;
Rectangle trim = computeTrim (0, 0, width, height);
return new Point (trim.width, trim.height);
}
void createHandle () {
super.createHandle ();
state &= ~CANVAS;
state |= TRACK_MOUSE;
}
void createItem (ExpandItem item, int style, int index) {
if (!(0 <= index && index <= itemCount)) error (SWT.ERROR_INVALID_RANGE);
if (itemCount == items.length) {
ExpandItem [] newItems = new ExpandItem [itemCount + 4];
System.arraycopy (items, 0, newItems, 0, items.length);
items = newItems;
}
System.arraycopy (items, index, items, index + 1, itemCount - index);
items [index] = item;
itemCount++;
if (focusItem == null) focusItem = item;
RECT rect = new RECT ();
OS.GetWindowRect (handle, rect);
item.width = Math.max (0, rect.right - rect.left - spacing * 2);
layoutItems (index, true);
}
void createWidget () {
super.createWidget ();
items = new ExpandItem [4];
if (!isAppThemed ()) {
backgroundMode = SWT.INHERIT_DEFAULT;
}
}
int defaultBackground() {
if (!isAppThemed ()) {
return OS.GetSysColor (OS.COLOR_WINDOW);
}
return super.defaultBackground();
}
void destroyItem (ExpandItem item) {
int index = 0;
while (index < itemCount) {
if (items [index] == item) break;
index++;
}
if (index == itemCount) return;
if (item == focusItem) {
int focusIndex = index > 0 ? index - 1 : 1;
if (focusIndex < itemCount) {
focusItem = items [focusIndex];
focusItem.redraw (true);
} else {
focusItem = null;
}
}
System.arraycopy (items, index + 1, items, index, --itemCount - index);
items [itemCount] = null;
item.redraw (true);
layoutItems (index, true);
}
void drawThemeBackground (int /*long*/ hDC, int /*long*/ hwnd, RECT rect) {
RECT rect2 = new RECT ();
OS.GetClientRect (handle, rect2);
OS.MapWindowPoints (handle, hwnd, rect2, 2);
OS.DrawThemeBackground (display.hExplorerBarTheme (), hDC, OS.EBP_NORMALGROUPBACKGROUND, 0, rect2, null);
}
void drawWidget (GC gc, RECT clipRect) {
int /*long*/ hTheme = 0;
if (isAppThemed ()) {
hTheme = display.hExplorerBarTheme ();
}
if (hTheme != 0) {
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
OS.DrawThemeBackground (hTheme, gc.handle, OS.EBP_HEADERBACKGROUND, 0, rect, clipRect);
} else {
drawBackground (gc.handle);
}
boolean drawFocus = false;
if (handle == OS.GetFocus ()) {
int uiState = (int)/*64*/OS.SendMessage (handle, OS.WM_QUERYUISTATE, 0, 0);
drawFocus = (uiState & OS.UISF_HIDEFOCUS) == 0;
}
int /*long*/ hCurrentFont = 0, oldFont = 0;
if (hTheme == 0) {
if (hFont != 0) {
hCurrentFont = hFont;
} else {
if (!OS.IsWinCE) {
NONCLIENTMETRICS info = OS.IsUnicode ? (NONCLIENTMETRICS) new NONCLIENTMETRICSW () : new NONCLIENTMETRICSA ();
info.cbSize = NONCLIENTMETRICS.sizeof;
if (OS.SystemParametersInfo (OS.SPI_GETNONCLIENTMETRICS, 0, info, 0)) {
LOGFONT logFont = OS.IsUnicode ? (LOGFONT) ((NONCLIENTMETRICSW)info).lfCaptionFont : ((NONCLIENTMETRICSA)info).lfCaptionFont;
hCurrentFont = OS.CreateFontIndirect (logFont);
}
}
}
if (hCurrentFont != 0) {
oldFont = OS.SelectObject (gc.handle, hCurrentFont);
}
if (foreground != -1) {
OS.SetTextColor (gc.handle, foreground);
}
}
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items[i];
item.drawItem (gc, hTheme, clipRect, item == focusItem && drawFocus);
}
if (hCurrentFont != 0) {
OS.SelectObject (gc.handle, oldFont);
if (hCurrentFont != hFont) OS.DeleteObject (hCurrentFont);
}
}
Control findBackgroundControl () {
Control control = super.findBackgroundControl ();
if (!isAppThemed ()) {
if (control == null) control = this;
}
return control;
}
Control findThemeControl () {
return isAppThemed () ? this : super.findThemeControl ();
}
int getBandHeight () {
if (hFont == 0) return ExpandItem.CHEVRON_SIZE;
int /*long*/ hDC = OS.GetDC (handle);
int /*long*/ oldHFont = OS.SelectObject (hDC, hFont);
TEXTMETRIC lptm = OS.IsUnicode ? (TEXTMETRIC)new TEXTMETRICW() : new TEXTMETRICA();
OS.GetTextMetrics (hDC, lptm);
OS.SelectObject (hDC, oldHFont);
OS.ReleaseDC (handle, hDC);
return Math.max (ExpandItem.CHEVRON_SIZE, lptm.tmHeight + 4);
}
/**
* Returns the item at the given, zero-relative index in the
* receiver. Throws an exception if the index is out of range.
*
* @param index the index of the item to return
* @return the item at the given index
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</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 ExpandItem getItem (int index) {
checkWidget ();
if (!(0 <= index && index < itemCount)) error (SWT.ERROR_INVALID_RANGE);
return items [index];
}
/**
* Returns the number of items contained in the receiver.
*
* @return the number of items
*
* @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 getItemCount () {
checkWidget ();
return itemCount;
}
/**
* Returns an array of <code>ExpandItem</code>s which are the items
* in the receiver.
* <p>
* Note: This is not the actual structure used by the receiver
* to maintain its list of items, so modifying the array will
* not affect the receiver.
* </p>
*
* @return the items in the receiver
*
* @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 ExpandItem [] getItems () {
checkWidget ();
ExpandItem [] result = new ExpandItem [itemCount];
System.arraycopy (items, 0, result, 0, itemCount);
return result;
}
/**
* Returns the receiver's spacing.
*
* @return the spacing
*
* @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 getSpacing () {
checkWidget ();
return spacing;
}
/**
* Searches the receiver's list starting at the first item
* (index 0) until an item is found that is equal to the
* argument, and returns the index of that item. If no item
* is found, returns -1.
*
* @param item the search item
* @return the index of the item
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the item is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the item has been disposed</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 int indexOf (ExpandItem item) {
checkWidget ();
if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
for (int i = 0; i < itemCount; i++) {
if (items [i] == item) return i;
}
return -1;
}
boolean isAppThemed () {
if (background != -1) return false;
if (foreground != -1) return false;
if (hFont != 0) return false;
return OS.COMCTL32_MAJOR >= 6 && OS.IsAppThemed ();
}
void layoutItems (int index, boolean setScrollbar) {
if (index < itemCount) {
int y = spacing - yCurrentScroll;
for (int i = 0; i < index; i++) {
ExpandItem item = items [i];
if (item.expanded) y += item.height;
y += item.getHeaderHeight () + spacing;
}
for (int i = index; i < itemCount; i++) {
ExpandItem item = items [i];
item.setBounds (spacing, y, 0, 0, true, false);
if (item.expanded) y += item.height;
y += item.getHeaderHeight () + spacing;
}
}
if (setScrollbar) setScrollbar ();
}
void releaseChildren (boolean destroy) {
if (items != null) {
for (int i=0; i<items.length; i++) {
ExpandItem item = items [i];
if (item != null && !item.isDisposed ()) {
item.release (false);
}
}
items = null;
}
focusItem = null;
super.releaseChildren (destroy);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when items in the receiver are expanded or collapsed.
*
* @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 ExpandListener
* @see #addExpandListener
*/
public void removeExpandListener (ExpandListener listener) {
checkWidget ();
if (listener == null) error (SWT.ERROR_NULL_ARGUMENT);
if (eventTable == null) return;
eventTable.unhook (SWT.Expand, listener);
eventTable.unhook (SWT.Collapse, listener);
}
void setBackgroundPixel (int pixel) {
super.setBackgroundPixel (pixel);
if (!OS.IsWinCE) {
int flags = OS.RDW_ERASE | OS.RDW_FRAME | OS.RDW_INVALIDATE | OS.RDW_ALLCHILDREN;
OS.RedrawWindow (handle, null, 0, flags);
}
}
public void setFont (Font font) {
super.setFont (font);
hFont = font != null ? font.handle : 0;
layoutItems (0, true);
}
void setForegroundPixel (int pixel) {
super.setForegroundPixel (pixel);
if (!OS.IsWinCE) {
int flags = OS.RDW_ERASE | OS.RDW_FRAME | OS.RDW_INVALIDATE | OS.RDW_ALLCHILDREN;
OS.RedrawWindow (handle, null, 0, flags);
}
}
void setScrollbar () {
if (itemCount == 0) return;
if ((style & SWT.V_SCROLL) == 0) return;
RECT rect = new RECT();
OS.GetClientRect (handle, rect);
int height = rect.bottom - rect.top;
ExpandItem item = items [itemCount - 1];
int maxHeight = item.y + getBandHeight () + spacing;
if (item.expanded) maxHeight += item.height;
//claim bottom free space
if (yCurrentScroll > 0 && height > maxHeight) {
yCurrentScroll = Math.max (0, yCurrentScroll + maxHeight - height);
layoutItems (0, false);
}
maxHeight += yCurrentScroll;
SCROLLINFO info = new SCROLLINFO ();
info.cbSize = SCROLLINFO.sizeof;
info.fMask = OS.SIF_RANGE | OS.SIF_PAGE | OS.SIF_POS;
info.nMin = 0;
info.nMax = maxHeight;
info.nPage = height;
info.nPos = Math.min (yCurrentScroll, info.nMax);
if (info.nPage != 0) info.nPage++;
OS.SetScrollInfo (handle, OS.SB_VERT, info, true);
}
/**
* Sets the receiver's spacing. Spacing specifies the number of pixels allocated around
* each item.
*
* @param spacing the spacing around each item
*
* @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 setSpacing (int spacing) {
checkWidget ();
if (spacing < 0) return;
if (spacing == this.spacing) return;
this.spacing = spacing;
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
int width = Math.max (0, (rect.right - rect.left) - spacing * 2);
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items[i];
if (item.width != width) item.setBounds (0, 0, width, item.height, false, true);
}
layoutItems (0, true);
OS.InvalidateRect (handle, null, true);
}
void showItem (ExpandItem item) {
Control control = item.control;
if (control != null && !control.isDisposed ()) {
control.setVisible (item.expanded);
}
item.redraw (true);
int index = indexOf (item);
layoutItems (index + 1, true);
}
void showFocus (boolean up) {
RECT rect = new RECT();
OS.GetClientRect (handle, rect);
int height = rect.bottom - rect.top;
int updateY = 0;
if (up) {
if (focusItem.y < 0) {
updateY = Math.min (yCurrentScroll, -focusItem.y);
}
} else {
int itemHeight = focusItem.y + getBandHeight ();
if (focusItem.expanded) {
if (height >= getBandHeight () + focusItem.height) {
itemHeight += focusItem.height;
}
}
if (itemHeight > height) {
updateY = height - itemHeight;
}
}
if (updateY != 0) {
yCurrentScroll = Math.max (0, yCurrentScroll - updateY);
if ((style & SWT.V_SCROLL) != 0) {
SCROLLINFO info = new SCROLLINFO ();
info.cbSize = SCROLLINFO.sizeof;
info.fMask = OS.SIF_POS;
info.nPos = yCurrentScroll;
OS.SetScrollInfo (handle, OS.SB_VERT, info, true);
}
OS.ScrollWindowEx (handle, 0, updateY, null, null, 0, null, OS.SW_SCROLLCHILDREN | OS.SW_INVALIDATE);
for (int i = 0; i < itemCount; i++) {
items [i].y += updateY;
}
}
}
TCHAR windowClass () {
return display.windowClass;
}
int /*long*/ windowProc () {
return display.windowProc;
}
LRESULT WM_KEYDOWN (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_KEYDOWN (wParam, lParam);
if (result != null) return result;
if (focusItem == null) return result;
switch ((int)/*64*/wParam) {
case OS.VK_SPACE:
case OS.VK_RETURN:
Event event = new Event ();
event.item = focusItem;
sendEvent (focusItem.expanded ? SWT.Collapse : SWT.Expand, event);
focusItem.expanded = !focusItem.expanded;
showItem (focusItem);
return LRESULT.ZERO;
case OS.VK_UP: {
int focusIndex = indexOf (focusItem);
if (focusIndex > 0) {
focusItem.redraw (true);
focusItem = items [focusIndex - 1];
focusItem.redraw (true);
showFocus (true);
return LRESULT.ZERO;
}
break;
}
case OS.VK_DOWN: {
int focusIndex = indexOf (focusItem);
if (focusIndex < itemCount - 1) {
focusItem.redraw (true);
focusItem = items [focusIndex + 1];
focusItem.redraw (true);
showFocus (false);
return LRESULT.ZERO;
}
break;
}
}
return result;
}
LRESULT WM_KILLFOCUS (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_KILLFOCUS (wParam, lParam);
if (focusItem != null) focusItem.redraw (true);
return result;
}
LRESULT WM_LBUTTONDOWN (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_LBUTTONDOWN (wParam, lParam);
if (result == LRESULT.ZERO) return result;
int x = OS.GET_X_LPARAM (lParam);
int y = OS.GET_Y_LPARAM (lParam);
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items[i];
boolean hover = item.isHover (x, y);
if (hover && focusItem != item) {
focusItem.redraw (true);
focusItem = item;
focusItem.redraw (true);
forceFocus ();
break;
}
}
return result;
}
LRESULT WM_LBUTTONUP (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_LBUTTONUP (wParam, lParam);
if (result == LRESULT.ZERO) return result;
if (focusItem == null) return result;
int x = OS.GET_X_LPARAM (lParam);
int y = OS.GET_Y_LPARAM (lParam);
boolean hover = focusItem.isHover (x, y);
if (hover) {
Event event = new Event ();
event.item = focusItem;
sendEvent (focusItem.expanded ? SWT.Collapse : SWT.Expand, event);
focusItem.expanded = !focusItem.expanded;
showItem (focusItem);
}
return result;
}
LRESULT WM_MOUSELEAVE (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_MOUSELEAVE (wParam, lParam);
if (result != null) return result;
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items [i];
if (item.hover) {
item.hover = false;
item.redraw (false);
break;
}
}
return result;
}
LRESULT WM_MOUSEMOVE (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_MOUSEMOVE (wParam, lParam);
if (result == LRESULT.ZERO) return result;
int x = OS.GET_X_LPARAM (lParam);
int y = OS.GET_Y_LPARAM (lParam);
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items [i];
boolean hover = item.isHover (x, y);
if (item.hover != hover) {
item.hover = hover;
item.redraw (false);
}
}
return result;
}
LRESULT WM_MOUSEWHEEL (int /*long*/ wParam, int /*long*/ lParam) {
return wmScrollWheel (true, wParam, lParam);
}
LRESULT WM_PAINT (int /*long*/ wParam, int /*long*/ lParam) {
PAINTSTRUCT ps = new PAINTSTRUCT ();
GCData data = new GCData ();
data.ps = ps;
data.hwnd = handle;
GC gc = new_GC (data);
if (gc != null) {
int width = ps.right - ps.left;
int height = ps.bottom - ps.top;
if (width != 0 && height != 0) {
RECT rect = new RECT ();
OS.SetRect (rect, ps.left, ps.top, ps.right, ps.bottom);
drawWidget (gc, rect);
if (hooks (SWT.Paint) || filters (SWT.Paint)) {
Event event = new Event ();
event.gc = gc;
event.x = rect.left;
event.y = rect.top;
event.width = width;
event.height = height;
sendEvent (SWT.Paint, event);
event.gc = null;
}
}
gc.dispose ();
}
return LRESULT.ZERO;
}
LRESULT WM_PRINTCLIENT (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_PRINTCLIENT (wParam, lParam);
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
GCData data = new GCData ();
data.device = display;
data.foreground = getForegroundPixel ();
GC gc = GC.win32_new (wParam, data);
drawWidget (gc, rect);
gc.dispose ();
return result;
}
LRESULT WM_SETCURSOR (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_SETCURSOR (wParam, lParam);
if (result != null) return result;
int hitTest = (short) OS.LOWORD (lParam);
if (hitTest == OS.HTCLIENT) {
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items [i];
if (item.hover) {
int /*long*/ hCursor = OS.LoadCursor (0, OS.IDC_HAND);
OS.SetCursor (hCursor);
return LRESULT.ONE;
}
}
}
return result;
}
LRESULT WM_SETFOCUS (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_SETFOCUS (wParam, lParam);
if (focusItem != null) focusItem.redraw (true);
return result;
}
LRESULT WM_SIZE (int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.WM_SIZE (wParam, lParam);
RECT rect = new RECT ();
OS.GetClientRect (handle, rect);
int width = Math.max (0, (rect.right - rect.left) - spacing * 2);
for (int i = 0; i < itemCount; i++) {
ExpandItem item = items[i];
if (item.width != width) item.setBounds (0, 0, width, item.height, false, true);
}
setScrollbar ();
OS.InvalidateRect (handle, null, true);
return result;
}
LRESULT wmScroll (ScrollBar bar, boolean update, int /*long*/ hwnd, int msg, int /*long*/ wParam, int /*long*/ lParam) {
LRESULT result = super.wmScroll (bar, true, hwnd, msg, wParam, lParam);
SCROLLINFO info = new SCROLLINFO ();
info.cbSize = SCROLLINFO.sizeof;
info.fMask = OS.SIF_POS;
OS.GetScrollInfo (handle, OS.SB_VERT, info);
int updateY = yCurrentScroll - info.nPos;
OS.ScrollWindowEx (handle, 0, updateY, null, null, 0, null, OS.SW_SCROLLCHILDREN | OS.SW_INVALIDATE);
yCurrentScroll = info.nPos;
if (updateY != 0) {
for (int i = 0; i < itemCount; i++) {
items [i].y += updateY;
}
}
return result;
}
}
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