| /******************************************************************************* |
| * Copyright (c) 2000, 2013 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.win32.*; |
| |
| /** |
| * Instances of this class represent a selectable user interface object |
| * that represents a expandable item in a expand bar. |
| * <p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>(none)</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| * |
| * @see ExpandBar |
| * @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 ExpandItem extends Item { |
| ExpandBar parent; |
| Control control; |
| boolean expanded, hover; |
| int x, y, width, height; |
| int imageHeight, imageWidth; |
| static final int TEXT_INSET = 6; |
| static final int BORDER = 1; |
| static final int CHEVRON_SIZE = 24; |
| |
| /** |
| * 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 Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ExpandItem (ExpandBar parent, int style) { |
| this (parent, style, checkNull (parent).getItemCount ()); |
| } |
| |
| /** |
| * Constructs a new instance of this class given its parent, a |
| * style value describing its behavior and appearance, and the index |
| * at which to place it in the items maintained by its parent. |
| * <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 |
| * @param index the zero-relative index to store the receiver in its parent |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the parent (inclusive)</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 Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public ExpandItem (ExpandBar parent, int style, int index) { |
| super (parent, style); |
| this.parent = parent; |
| parent.createItem (this, style, index); |
| } |
| |
| static ExpandBar checkNull (ExpandBar control) { |
| if (control == null) SWT.error (SWT.ERROR_NULL_ARGUMENT); |
| return control; |
| } |
| |
| private void drawChevron (long /*int*/ hDC, RECT rect) { |
| long /*int*/ oldBrush = OS.SelectObject (hDC, OS.GetSysColorBrush (OS.COLOR_BTNFACE)); |
| OS.PatBlt (hDC, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, OS.PATCOPY); |
| OS.SelectObject (hDC, oldBrush); |
| rect.left += 4; |
| rect.top += 4; |
| rect.right -= 4; |
| rect.bottom -= 4; |
| long /*int*/ hPen = OS.CreatePen (OS.PS_SOLID, 1, parent.getForegroundPixel ()); |
| long /*int*/ oldPen = OS.SelectObject (hDC, hPen); |
| int [] polyline1, polyline2; |
| if (expanded) { |
| int px = rect.left + 5; |
| int py = rect.top + 7; |
| polyline1 = new int [] { |
| px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3, |
| px+3,py-2, px+4,py-2, px+4,py-1, px+5,py-1, px+5,py, px+7,py}; |
| py += 4; |
| polyline2 = new int [] { |
| px,py, px+1,py, px+1,py-1, px+2,py-1, px+2,py-2, px+3,py-2, px+3,py-3, |
| px+3,py-2, px+4,py-2, px+4,py-1, px+5,py-1, px+5,py, px+7,py}; |
| } else { |
| int px = rect.left + 5; |
| int py = rect.top + 4; |
| polyline1 = new int[] { |
| px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3, |
| px+3,py+2, px+4,py+2, px+4,py+1, px+5,py+1, px+5,py, px+7,py}; |
| py += 4; |
| polyline2 = new int [] { |
| px,py, px+1,py, px+1,py+1, px+2,py+1, px+2,py+2, px+3,py+2, px+3,py+3, |
| px+3,py+2, px+4,py+2, px+4,py+1, px+5,py+1, px+5,py, px+7,py}; |
| } |
| OS.Polyline (hDC, polyline1, polyline1.length / 2); |
| OS.Polyline (hDC, polyline2, polyline2.length / 2); |
| if (hover) { |
| long /*int*/ whitePen = OS.CreatePen (OS.PS_SOLID, 1, OS.GetSysColor (OS.COLOR_3DHILIGHT)); |
| long /*int*/ darkGrayPen = OS.CreatePen (OS.PS_SOLID, 1, OS.GetSysColor (OS.COLOR_3DSHADOW)); |
| OS.SelectObject (hDC, whitePen); |
| int [] points1 = { |
| rect.left, rect.bottom, |
| rect.left, rect.top, |
| rect.right, rect.top}; |
| OS.Polyline (hDC, points1, points1.length / 2); |
| OS.SelectObject (hDC, darkGrayPen); |
| int [] points2 = { |
| rect.right, rect.top, |
| rect.right, rect.bottom, |
| rect.left, rect.bottom}; |
| OS.Polyline (hDC, points2, points2.length / 2); |
| OS.SelectObject (hDC, oldPen); |
| OS.DeleteObject (whitePen); |
| OS.DeleteObject (darkGrayPen); |
| } else { |
| OS.SelectObject (hDC, oldPen); |
| } |
| OS.DeleteObject (hPen); |
| } |
| |
| void drawItem (GC gc, long /*int*/ hTheme, RECT clipRect, boolean drawFocus) { |
| long /*int*/ hDC = gc.handle; |
| int headerHeight = parent.getBandHeight (); |
| RECT rect = new RECT (); |
| OS.SetRect (rect, x, y, x + width, y + headerHeight); |
| if (hTheme != 0) { |
| OS.DrawThemeBackground (hTheme, hDC, OS.EBP_NORMALGROUPHEAD, 0, rect, clipRect); |
| } else { |
| long /*int*/ oldBrush = OS.SelectObject (hDC, OS.GetSysColorBrush (OS.COLOR_BTNFACE)); |
| OS.PatBlt (hDC, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, OS.PATCOPY); |
| OS.SelectObject (hDC, oldBrush); |
| } |
| if (image != null) { |
| rect.left += ExpandItem.TEXT_INSET; |
| if (imageHeight > headerHeight) { |
| gc.drawImage (image, DPIUtil.autoScaleDown(rect.left), DPIUtil.autoScaleDown(rect.top + headerHeight - imageHeight)); |
| } else { |
| gc.drawImage (image, DPIUtil.autoScaleDown(rect.left), DPIUtil.autoScaleDown(rect.top + (headerHeight - imageHeight) / 2)); |
| } |
| rect.left += imageWidth; |
| } |
| if (text.length () > 0) { |
| rect.left += ExpandItem.TEXT_INSET; |
| TCHAR buffer; |
| if (OS.IsUnicode && (style & SWT.FLIP_TEXT_DIRECTION) != 0) { |
| int bits = OS.GetWindowLong (parent.handle, OS.GWL_EXSTYLE); |
| if ((bits & OS.WS_EX_LAYOUTRTL) != 0) { |
| buffer = new TCHAR (parent.getCodePage (), LRE + text, false); |
| } else { |
| buffer = new TCHAR (parent.getCodePage (), RLE + text, false); |
| } |
| } |
| else |
| buffer = new TCHAR (parent.getCodePage (), text, false); |
| if (hTheme != 0) { |
| OS.DrawThemeText (hTheme, hDC, OS.EBP_NORMALGROUPHEAD, 0, buffer.chars, buffer.length(), OS.DT_VCENTER | OS.DT_SINGLELINE, 0, rect); |
| } else { |
| int oldBkMode = OS.SetBkMode (hDC, OS.TRANSPARENT); |
| OS.DrawText (hDC, buffer, buffer.length (), rect, OS.DT_VCENTER | OS.DT_SINGLELINE); |
| OS.SetBkMode (hDC, oldBkMode); |
| } |
| } |
| int chevronSize = ExpandItem.CHEVRON_SIZE; |
| rect.left = rect.right - chevronSize; |
| rect.top = y + (headerHeight - chevronSize) / 2; |
| rect.bottom = rect.top + chevronSize; |
| if (hTheme != 0) { |
| int partID = expanded ? OS.EBP_NORMALGROUPCOLLAPSE : OS.EBP_NORMALGROUPEXPAND; |
| int stateID = hover ? OS.EBNGC_HOT : OS.EBNGC_NORMAL; |
| OS.DrawThemeBackground (hTheme, hDC, partID, stateID, rect, clipRect); |
| } else { |
| drawChevron (hDC, rect); |
| } |
| if (drawFocus) { |
| OS.SetRect (rect, x + 1, y + 1, x + width - 2, y + headerHeight - 2); |
| OS.DrawFocusRect (hDC, rect); |
| } |
| if (expanded) { |
| if (!parent.isAppThemed ()) { |
| long /*int*/ pen = OS.CreatePen (OS.PS_SOLID, 1, OS.GetSysColor (OS.COLOR_BTNFACE)); |
| long /*int*/ oldPen = OS.SelectObject (hDC, pen); |
| int [] points = { |
| x, y + headerHeight, |
| x, y + headerHeight + height, |
| x + width - 1, y + headerHeight + height, |
| x + width - 1, y + headerHeight - 1}; |
| OS.Polyline (hDC, points, points.length / 2); |
| OS.SelectObject (hDC, oldPen); |
| OS.DeleteObject (pen); |
| } |
| } |
| } |
| |
| @Override |
| void destroyWidget () { |
| parent.destroyItem (this); |
| releaseHandle (); |
| } |
| |
| /** |
| * Returns the control that is shown when the item is expanded. |
| * If no control has been set, return <code>null</code>. |
| * |
| * @return the control |
| * |
| * @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 Control getControl () { |
| checkWidget (); |
| return control; |
| } |
| |
| /** |
| * Returns <code>true</code> if the receiver is expanded, |
| * and false otherwise. |
| * |
| * @return the expanded 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 getExpanded () { |
| checkWidget (); |
| return expanded; |
| } |
| |
| /** |
| * Returns the height of the receiver's header |
| * |
| * @return the height of the header |
| * |
| * @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 getHeaderHeight () { |
| checkWidget (); |
| return DPIUtil.autoScaleDown(getHeaderHeightInPixels()); |
| } |
| |
| int getHeaderHeightInPixels () { |
| return Math.max (parent.getBandHeight (), imageHeight); |
| } |
| |
| /** |
| * Gets the height of the receiver. |
| * |
| * @return the height |
| * |
| * @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 getHeight () { |
| checkWidget (); |
| return DPIUtil.autoScaleDown(getHeightInPixels()); |
| } |
| |
| int getHeightInPixels () { |
| return height; |
| } |
| |
| /** |
| * Returns the receiver's parent, which must be a <code>ExpandBar</code>. |
| * |
| * @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 ExpandBar getParent () { |
| checkWidget (); |
| return parent; |
| } |
| |
| int getPreferredWidth (long /*int*/ hTheme, long /*int*/ hDC) { |
| int width = ExpandItem.TEXT_INSET * 2 + ExpandItem.CHEVRON_SIZE; |
| if (image != null) { |
| width += ExpandItem.TEXT_INSET + imageWidth; |
| } |
| if (text.length() > 0) { |
| RECT rect = new RECT (); |
| TCHAR buffer = new TCHAR (parent.getCodePage (), text, false); |
| if (hTheme != 0) { |
| OS.GetThemeTextExtent (hTheme, hDC, OS.EBP_NORMALGROUPHEAD, 0, buffer.chars, buffer.length(), OS.DT_SINGLELINE, null, rect); |
| } else { |
| OS.DrawText (hDC, buffer, buffer.length (), rect, OS.DT_CALCRECT); |
| } |
| width += (rect.right - rect.left); |
| } |
| return width; |
| } |
| |
| boolean isHover (int x, int y) { |
| int bandHeight = parent.getBandHeight (); |
| return this.x < x && x < (this.x + width) && this.y < y && y < (this.y + bandHeight); |
| } |
| |
| void redraw (boolean all) { |
| long /*int*/ parentHandle = parent.handle; |
| int headerHeight = parent.getBandHeight (); |
| RECT rect = new RECT (); |
| int left = all ? x : x + width - headerHeight; |
| OS.SetRect (rect, left, y, x + width, y + headerHeight); |
| OS.InvalidateRect (parentHandle, rect, true); |
| if (imageHeight > headerHeight) { |
| OS.SetRect (rect, x + ExpandItem.TEXT_INSET, y + headerHeight - imageHeight, x + ExpandItem.TEXT_INSET + imageWidth, y); |
| OS.InvalidateRect (parentHandle, rect, true); |
| } |
| if (!parent.isAppThemed ()) { |
| OS.SetRect (rect, x, y + headerHeight, x + width, y + headerHeight + height + 1); |
| OS.InvalidateRect (parentHandle, rect, true); |
| } |
| } |
| |
| @Override |
| void releaseHandle () { |
| super.releaseHandle (); |
| parent = null; |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| control = null; |
| } |
| |
| void setBoundsInPixels (int x, int y, int width, int height, boolean move, boolean size) { |
| redraw (true); |
| int headerHeight = parent.getBandHeight (); |
| if (move) { |
| if (imageHeight > headerHeight) { |
| y += (imageHeight - headerHeight); |
| } |
| this.x = x; |
| this.y = y; |
| redraw (true); |
| } |
| if (size) { |
| this.width = width; |
| this.height = height; |
| redraw (true); |
| } |
| if (control != null && !control.isDisposed ()) { |
| if (!parent.isAppThemed ()) { |
| x += BORDER; |
| width = Math.max (0, width - BORDER * 2); |
| height = Math.max (0, height - BORDER); |
| } |
| if (move && size) control.setBoundsInPixels (x, y + headerHeight, width, height); |
| if (move && !size) control.setLocationInPixels (x, y + headerHeight); |
| if (!move && size) control.setSizeInPixels (width, height); |
| } |
| } |
| |
| /** |
| * Sets the control that is shown when the item is expanded. |
| * |
| * @param control the new control (or null) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the control has been disposed</li> |
| * <li>ERROR_INVALID_PARENT - if the control is not in the same widget tree</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 void setControl (Control control) { |
| checkWidget (); |
| if (control != null) { |
| if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| if (control.parent != parent) error (SWT.ERROR_INVALID_PARENT); |
| } |
| this.control = control; |
| if (control != null) { |
| int headerHeight = parent.getBandHeight (); |
| control.setVisible (expanded); |
| if (!parent.isAppThemed ()) { |
| int width = Math.max (0, this.width - BORDER * 2); |
| int height = Math.max (0, this.height - BORDER); |
| control.setBoundsInPixels (x + BORDER, y + headerHeight, width, height); |
| } else { |
| control.setBoundsInPixels (x, y + headerHeight, width, height); |
| } |
| } |
| } |
| |
| /** |
| * Sets the expanded state of the receiver. |
| * |
| * @param expanded the new expanded 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 setExpanded (boolean expanded) { |
| checkWidget (); |
| this.expanded = expanded; |
| parent.showItem (this); |
| } |
| |
| /** |
| * Sets the height of the receiver. This is height of the item when it is expanded, |
| * excluding the height of the header. |
| * |
| * @param height the new height |
| * |
| * @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 setHeight (int height) { |
| checkWidget (); |
| setHeightInPixels(DPIUtil.autoScaleUp(height)); |
| } |
| |
| void setHeightInPixels (int height) { |
| if (height < 0) return; |
| setBoundsInPixels (0, 0, width, height, false, true); |
| if (expanded) parent.layoutItems (parent.indexOf (this) + 1, true); |
| } |
| |
| @Override |
| public void setImage (Image image) { |
| super.setImage (image); |
| int oldImageHeight = imageHeight; |
| if (image != null) { |
| Rectangle bounds = image.getBoundsInPixels (); |
| imageHeight = bounds.height; |
| imageWidth = bounds.width; |
| } else { |
| imageHeight = imageWidth = 0; |
| } |
| if (oldImageHeight != imageHeight) { |
| parent.layoutItems (parent.indexOf (this), true); |
| } else { |
| redraw (true); |
| } |
| } |
| |
| @Override |
| public void setText (String string) { |
| super.setText (string); |
| if ((state & HAS_AUTO_DIRECTION) != 0) { |
| updateTextDirection (AUTO_TEXT_DIRECTION); |
| } |
| redraw (true); |
| } |
| } |