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Java > Open Source Codes > org > eclipse > swt > internal > theme > Theme


1 /*******************************************************************************
2  * Copyright (c) 2000, 2006 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.swt.internal.theme;
12
13 import org.eclipse.swt.*;
14 import org.eclipse.swt.graphics.*;
15
16 public class Theme {
17     
18     Device device;
19
20 public Theme(Device device) {
21     this.device = device;
22 }
23
24 public Rectangle computeTrim(GC gc, DrawData data) {
25     checkTheme();
26     if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
27     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
28     if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
29     return data.computeTrim(this, gc);
30 }
31
32 void checkTheme() {
33     if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
34 }
35
36 public void dispose () {
37     device = null;
38 }
39
40 public void drawBackground(GC gc, Rectangle bounds, DrawData data) {
41     checkTheme();
42     if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
43     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
44     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
45     if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
46     data.draw(this, gc, bounds);
47 }
48
49 public void drawFocus(GC gc, Rectangle bounds, DrawData data) {
50     checkTheme();
51     if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
52     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
53     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
54     if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
55     gc.drawFocus(bounds.x, bounds.y, bounds.width, bounds.height);
56 }
57
58 public void drawImage(GC gc, Rectangle bounds, DrawData data, Image image, int flags) {
59     checkTheme();
60     if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
61     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
62     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
63     if (image == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
64     if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
65     data.drawImage(this, image, gc, bounds);
66 }
67
68 public void drawText(GC gc, Rectangle bounds, DrawData data, String JavaDoc text, int flags) {
69     checkTheme();
70     if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
71     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
72     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
73     if (text == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
74     if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
75     data.drawText(this, text, flags, gc, bounds);
76 }
77
78 public Rectangle getBounds(int part, Rectangle bounds, DrawData data) {
79     checkTheme();
80     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
81     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
82     return data.getBounds(part, bounds);
83 }
84
85 public int getSelection(Point offset, Rectangle bounds, RangeDrawData data) {
86     checkTheme();
87     if (offset == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
88     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
89     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
90     return data.getSelection(offset, bounds);
91 }
92
93 public int hitBackground(Point position, Rectangle bounds, DrawData data) {
94     checkTheme();
95     if (position == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
96     if (bounds == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
97     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
98     return data.hit(this, position, bounds);
99 }
100
101 public boolean isDisposed() {
102     return device == null;
103 }
104
105 public Rectangle measureText(GC gc, Rectangle bounds, DrawData data, String JavaDoc text, int flags) {
106     checkTheme();
107     if (gc == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
108     if (data == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
109     if (text == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
110     if (gc.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
111     return data.measureText(this, text, flags, gc, bounds);
112 }
113 }
114
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