1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
package com.explodingpixels.widgets.plaf;
import com.explodingpixels.painter.Painter;
import com.explodingpixels.widgets.WindowUtils;
import java.awt.*;
/**
* An implementation of {@link Painter} that paints a scroll thumb using images.
*/
public class ScrollThumbImagePainter implements Painter<Component> {
private final ScrollBarOrientation fOrientation;
private final ImageSet fDisabledImageSet;
private final ImageSet fInactiveImageSet;
private final ImageSet fActiveImageSet;
private ScrollThumbImagePainter(
ScrollBarOrientation orientation,
Image disabledLowerBound, Image disabledMiddle, Image disabledUpperBound,
Image inactiveLowerBound, Image inactiveMiddle, Image inactiveUpperBound,
Image activeLowerBound, Image activeMiddle, Image activeUpperBound) {
// TODO add null checking.
fOrientation = orientation;
fDisabledImageSet = new ImageSet(disabledLowerBound, disabledMiddle, disabledUpperBound);
fInactiveImageSet = new ImageSet(inactiveLowerBound, inactiveMiddle, inactiveUpperBound);
fActiveImageSet = new ImageSet(activeLowerBound, activeMiddle, activeUpperBound);
}
/**
* Creates an image-based vertical scroll thumb painter using the given images. Lower bound
* refers to the area closest to the minimum value (top or left). Upper bound refers to the area
* closest to the maximum value (bottom or right).
*
* @param disabledLowerBound the lower bound disabled image.
* @param disabledMiddle the middle disabled image.
* @param disabledUpperBound the upper bound disabled image.
* @param inactiveLowerBound the lower bound inactiveimage
* @param inactiveMiddle the middle inactive image
* @param inactiveUpperBound the upper bound inactive image.
* @param activeLowerBound the lower bound active image.
* @param activeMiddle the middle active image.
* @param activeUpperBound the upper bound active image.
* @return a state based (disabled or inactive or active) scroll thumb painter.
*/
public static ScrollThumbImagePainter createVerticalScrollThumbImagePainter(
Image disabledLowerBound, Image disabledMiddle, Image disabledUpperBound,
Image inactiveLowerBound, Image inactiveMiddle, Image inactiveUpperBound,
Image activeLowerBound, Image activeMiddle, Image activeUpperBound) {
return new ScrollThumbImagePainter(ScrollBarOrientation.VERTICAL, disabledLowerBound,
disabledMiddle, disabledUpperBound, inactiveLowerBound, inactiveMiddle,
inactiveUpperBound, activeLowerBound, activeMiddle, activeUpperBound);
}
/**
* Creates an image-based horizontal scroll thumb painter using the given images. Lower bound
* refers to the area closest to the minimum value (top or left). Upper bound refers to the area
* closest to the maximum value (bottom or right).
*
* @param disabledLowerBound the lower bound disabled image.
* @param disabledMiddle the middle disabled image.
* @param disabledUpperBound the upper bound disabled image.
* @param inactiveLowerBound the lower bound inactiveimage
* @param inactiveMiddle the middle inactive image
* @param inactiveUpperBound the upper bound inactive image.
* @param activeLowerBound the lower bound active image.
* @param activeMiddle the middle active image.
* @param activeUpperBound the upper bound active image.
* @return a state based (disabled or inactive or active) scroll thumb painter.
*/
public static ScrollThumbImagePainter createHorizontalScrollThumbImagePainter(
Image disabledLowerBound, Image disabledMiddle, Image disabledUpperBound,
Image inactiveLowerBound, Image inactiveMiddle, Image inactiveUpperBound,
Image activeLowerBound, Image activeMiddle, Image activeUpperBound) {
return new ScrollThumbImagePainter(ScrollBarOrientation.HORIZONTAL, disabledLowerBound,
disabledMiddle, disabledUpperBound, inactiveLowerBound, inactiveMiddle,
inactiveUpperBound, activeLowerBound, activeMiddle, activeUpperBound);
}
private ImageSet getImageSet(Component objectToPaint) {
ImageSet retVal;
if (!objectToPaint.isEnabled()) {
retVal = fDisabledImageSet;
} else if (WindowUtils.isParentWindowFocused(objectToPaint)) {
retVal = fActiveImageSet;
} else {
retVal = fInactiveImageSet;
}
return retVal;
}
public void paint(Graphics2D graphics, Component objectToPaint, int width, int height) {
ImageSet imageSet = getImageSet(objectToPaint);
// grab the size of the scroll bar in dimension agnostic terms.
Dimension scrollerSize = new Dimension(width, height);
int scrollerLength = fOrientation.getLength(scrollerSize);
int scrollerThickness = fOrientation.getThickness(imageSet.getLowerBoundImageSize());
// calculate the starting point of the lower bound image in dimension agnostic terms, such
// that the image is draw centered in the containing component. note that we pass in -1 for
// the length of the resultant bounds rectangle as we don't care about creating a second
// coordinate.
int lowerPosition = 0;
Point lowerPoint = fOrientation.createCenteredBounds(
objectToPaint, lowerPosition, scrollerThickness, -1).getLocation();
graphics.drawImage(imageSet.getLowerBoundImage(), lowerPoint.x, lowerPoint.y, null);
// calculate the starting point of the middle bound image in dimension agnostic terms. start
// by determing the position (the value in the scrolling dimension) and length to draw the
// image. then create bounds from that position and length.
int upperLength = fOrientation.getLength(imageSet.getUpperBoundImageSize());
int middleStartPosition = fOrientation.getLength(imageSet.getLowerBoundImageSize());
int middleEndPosition = scrollerLength - upperLength;
int middleLength = middleEndPosition - middleStartPosition;
Rectangle middleBounds = fOrientation.createCenteredBounds(
objectToPaint, middleStartPosition, scrollerThickness, middleLength);
Image middleImage = imageSet.getMiddleImage();
graphics.drawImage(middleImage, middleBounds.x, middleBounds.y,
middleBounds.x + middleBounds.width, middleBounds.y + middleBounds.height,
0, 0, middleImage.getWidth(null), middleImage.getHeight(null), null);
// calculate the position (the value in the scrolling dimension) of the upper bound image,
// such that the image is draw centered in the containing component. note that we pass in -1
// for the length of the resultant bounds rectangle as we don't care about creating a second
// coordinate.
int upperPosition = scrollerLength - upperLength;
Point upperPoint = fOrientation.createCenteredBounds(
objectToPaint, upperPosition, scrollerThickness, -1).getLocation();
graphics.drawImage(imageSet.getUpperBoundImage(), upperPoint.x, upperPoint.y, null);
}
// ImageSet implementation. ///////////////////////////////////////////////////////////////////
private static class ImageSet {
private final Image fLowerBoundImage;
private final Image fMiddleImage;
private final Image fUpperBoundImage;
private Dimension fLowerBoundImageSize;
private Dimension fMiddleBoundImageSize;
private Dimension fUppoerBoundImageSize;
private ImageSet(Image lowerBoundImage, Image middleImage, Image upperBoundImage) {
fLowerBoundImage = lowerBoundImage;
fMiddleImage = middleImage;
fUpperBoundImage = upperBoundImage;
fLowerBoundImageSize = createImageSize(fLowerBoundImage);
fMiddleBoundImageSize = createImageSize(fMiddleImage);
fUppoerBoundImageSize = createImageSize(fUpperBoundImage);
}
public Image getLowerBoundImage() {
return fLowerBoundImage;
}
public Image getMiddleImage() {
return fMiddleImage;
}
public Image getUpperBoundImage() {
return fUpperBoundImage;
}
public Dimension getLowerBoundImageSize() {
return fLowerBoundImageSize;
}
public Dimension getMiddleBoundImageSize() {
return fMiddleBoundImageSize;
}
public Dimension getUpperBoundImageSize() {
return fUppoerBoundImageSize;
}
private static Dimension createImageSize(Image image) {
return new Dimension(image.getWidth(null), image.getHeight(null));
}
}
}
|
