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1
11 package org.eclipse.ui.internal.forms.widgets;
12
13 import java.util.ArrayList  ;
14
15 import org.eclipse.swt.SWT;
16 import org.eclipse.swt.events.MouseEvent;
17 import org.eclipse.swt.graphics.*;
18 import org.eclipse.swt.widgets.Display;
19
20 public class SelectionData {
21 public Display display;
22 public Color bg;
23 public Color fg;
24 private Point start;
25 private Point stop;
26 private ArrayList segments;
27 private boolean newLineNeeded;
28
29 public SelectionData(MouseEvent e) {
30 display = e.display;
31 segments = new ArrayList ();
32 start = new Point(e.x, e.y);
33 stop = new Point(e.x, e.y);
34 bg = e.display.getSystemColor(SWT.COLOR_LIST_SELECTION);
35 fg = e.display.getSystemColor(SWT.COLOR_LIST_SELECTION_TEXT);
36 }
37
38 public void markNewLine() {
39 newLineNeeded=true;
40 }
41 public void addSegment(String text) {
42 if (newLineNeeded) {
43 segments.add(System.getProperty("line.separator")); newLineNeeded=false;
45 }
46 segments.add(text);
47 }
48
49 public void update(MouseEvent e) {
50 stop.x = e.x;
52 stop.y = e.y;
53 }
54 public void reset() {
55 segments.clear();
56 }
57 public String getSelectionText() {
58 StringBuffer buf = new StringBuffer ();
59 for (int i=0; i<segments.size(); i++) {
60 buf.append((String )segments.get(i));
61 }
62 return buf.toString();
63 }
64 public boolean canCopy() {
65 return segments.size()>0;
66 }
67
68 private int getTopOffset() {
69 return start.y<stop.y?start.y:stop.y;
70 }
71 private int getBottomOffset() {
72 return start.y>stop.y?start.y:stop.y;
73 }
74 public int getLeftOffset(Locator locator) {
75 return isInverted(locator)? stop.x:start.x;
76 }
77 public int getLeftOffset(int rowHeight) {
78 return isInverted(rowHeight) ? stop.x:start.x;
79 }
80 public int getRightOffset(Locator locator) {
81 return isInverted(locator)? start.x: stop.x;
82 }
83 public int getRightOffset(int rowHeight) {
84 return isInverted(rowHeight) ? start.x:stop.x;
85 }
86 private boolean isInverted(Locator locator) {
87 int rowHeight = ((int [])locator.heights.get(locator.rowCounter))[0];
88 return isInverted(rowHeight);
89 }
90 private boolean isInverted(int rowHeight) {
91 int deltaY = start.y - stop.y;
92 if (Math.abs(deltaY) > rowHeight) {
93 return deltaY>0;
95 }
96 return start.x > stop.x;
98 }
99 public boolean isEnclosed() {
100 return !start.equals(stop);
101 }
102
103 public boolean isSelectedRow(Locator locator) {
104 if (!isEnclosed())
105 return false;
106 int rowHeight = ((int [])locator.heights.get(locator.rowCounter))[0];
107 return isSelectedRow(locator.y, rowHeight);
108 }
109 public boolean isSelectedRow(int y, int rowHeight) {
110 if (!isEnclosed())
111 return false;
112 return (y + rowHeight >= getTopOffset() &&
113 y <= getBottomOffset());
114 }
115 public boolean isFirstSelectionRow(Locator locator) {
116 if (!isEnclosed())
117 return false;
118 int rowHeight = ((int [])locator.heights.get(locator.rowCounter))[0];
119 return (locator.y + rowHeight >= getTopOffset() &&
120 locator.y <= getTopOffset());
121 }
122 public boolean isFirstSelectionRow(int y, int rowHeight) {
123 if (!isEnclosed())
124 return false;
125 return (y + rowHeight >= getTopOffset() &&
126 y <= getTopOffset());
127 }
128 public boolean isLastSelectionRow(Locator locator) {
129 if (!isEnclosed())
130 return false;
131 int rowHeight = ((int [])locator.heights.get(locator.rowCounter))[0];
132 return (locator.y + rowHeight >=getBottomOffset() &&
133 locator.y <= getBottomOffset());
134 }
135 public boolean isLastSelectionRow(int y, int rowHeight) {
136 if (!isEnclosed())
137 return false;
138 return (y + rowHeight >=getBottomOffset() &&
139 y <= getBottomOffset());
140 }
141 }
142 |
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