forked from jgraph/mxgraph
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathmxBasicCanvas.java
More file actions
161 lines (134 loc) · 2.85 KB
/
mxBasicCanvas.java
File metadata and controls
161 lines (134 loc) · 2.85 KB
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
package com.mxgraph.canvas;
import java.awt.image.BufferedImage;
import java.util.Hashtable;
import java.util.Map;
import com.mxgraph.util.mxConstants;
import com.mxgraph.util.mxPoint;
import com.mxgraph.util.mxUtils;
public abstract class mxBasicCanvas implements mxICanvas
{
/**
* Specifies if image aspect should be preserved in drawImage. Default is true.
*/
public static boolean PRESERVE_IMAGE_ASPECT = true;
/**
* Defines the default value for the imageBasePath in all GDI canvases.
* Default is an empty string.
*/
public static String DEFAULT_IMAGEBASEPATH = "";
/**
* Defines the base path for images with relative paths. Trailing slash
* is required. Default value is DEFAULT_IMAGEBASEPATH.
*/
protected String imageBasePath = DEFAULT_IMAGEBASEPATH;
/**
* Specifies the current translation. Default is (0,0).
*/
protected mxPoint translate = new mxPoint();
/**
* Specifies the current scale. Default is 1.
*/
protected double scale = 1;
/**
* Specifies whether labels should be painted. Default is true.
*/
protected boolean drawLabels = true;
/**
* Cache for images.
*/
protected Hashtable<String, BufferedImage> imageCache = new Hashtable<String, BufferedImage>();
/**
* Sets the current translate.
*/
public void setTranslate(double dx, double dy)
{
translate = new mxPoint(dx, dy);
}
/**
* Returns the current translate.
*/
public mxPoint getTranslate()
{
return translate;
}
/**
*
*/
public void setScale(double scale)
{
this.scale = scale;
}
/**
*
*/
public double getScale()
{
return scale;
}
/**
*
*/
public void setDrawLabels(boolean drawLabels)
{
this.drawLabels = drawLabels;
}
/**
*
*/
public String getImageBasePath()
{
return imageBasePath;
}
/**
*
*/
public void setImageBasePath(String imageBasePath)
{
this.imageBasePath = imageBasePath;
}
/**
*
*/
public boolean isDrawLabels()
{
return drawLabels;
}
/**
* Returns an image instance for the given URL. If the URL has
* been loaded before than an instance of the same instance is
* returned as in the previous call.
*/
public BufferedImage loadImage(String image)
{
BufferedImage img = imageCache.get(image);
if (img == null)
{
img = mxUtils.loadImage(image);
if (img != null)
{
imageCache.put(image, img);
}
}
return img;
}
/**
*
*/
public void flushImageCache()
{
imageCache.clear();
}
/**
* Gets the image path from the given style. If the path is relative (does
* not start with a slash) then it is appended to the imageBasePath.
*/
public String getImageForStyle(Map<String, Object> style)
{
String filename = mxUtils.getString(style, mxConstants.STYLE_IMAGE);
if (filename != null && !filename.startsWith("/") && !filename.startsWith("file:/"))
{
filename = imageBasePath + filename;
}
return filename;
}
}