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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.ui.internal.forms.widgets.SelectionData;
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14
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15 import dwtx.ui.internal.forms.widgets.Locator;
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16
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17 import dwt.DWT;
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18 import dwt.events.MouseEvent;
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19 import dwt.graphics.Color;
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20 import dwt.graphics.Point;
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21 import dwt.widgets.Display;
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22
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23 import dwt.dwthelper.utils;
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24 import tango.util.collection.ArraySeq;
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25 static import tango.text.Text;
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26
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27 public class SelectionData {
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28 public Display display;
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29 public Color bg;
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30 public Color fg;
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31 private Point start;
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32 private Point stop;
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33 private ArraySeq!(String) segments;
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34 private bool newLineNeeded;
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35
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36 public this(MouseEvent e) {
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37 display = e.display;
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38 segments = new ArraySeq!(String);
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39 start = new Point(e.x, e.y);
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40 stop = new Point(e.x, e.y);
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41 bg = e.display.getSystemColor(DWT.COLOR_LIST_SELECTION);
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42 fg = e.display.getSystemColor(DWT.COLOR_LIST_SELECTION_TEXT);
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43 }
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44
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45 public void markNewLine() {
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46 newLineNeeded=true;
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47 }
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48 public void addSegment(String text) {
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49 if (newLineNeeded) {
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50 segments.append(System.getProperty("line.separator")); //$NON-NLS-1$
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51 newLineNeeded=false;
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52 }
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53 segments.append(text);
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54 }
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55
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56 public void update(MouseEvent e) {
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57 //Control c = (Control)e.widget;
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58 stop.x = e.x;
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59 stop.y = e.y;
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60 }
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61 public void reset() {
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62 segments.clear();
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63 }
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64 public String getSelectionText() {
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65 auto buf = new tango.text.Text.Text!(char);
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66 for (int i=0; i<segments.size(); i++) {
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67 buf.append(segments.get(i));
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68 }
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69 return buf.toString();
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70 }
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71 public bool canCopy() {
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72 return segments.size()>0;
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73 }
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74
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75 private int getTopOffset() {
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76 return start.y<stop.y?start.y:stop.y;
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77 }
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78 private int getBottomOffset() {
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79 return start.y>stop.y?start.y:stop.y;
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80 }
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81 public int getLeftOffset(Locator locator) {
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82 return isInverted(locator)? stop.x:start.x;
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83 }
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84 public int getLeftOffset(int rowHeight) {
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85 return isInverted(rowHeight) ? stop.x:start.x;
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86 }
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87 public int getRightOffset(Locator locator) {
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88 return isInverted(locator)? start.x: stop.x;
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89 }
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90 public int getRightOffset(int rowHeight) {
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91 return isInverted(rowHeight) ? start.x:stop.x;
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92 }
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93 private bool isInverted(Locator locator) {
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94 int rowHeight = locator.heights.get(locator.rowCounter).array[0];
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95 return isInverted(rowHeight);
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96 }
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97 private bool isInverted(int rowHeight) {
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98 int deltaY = start.y - stop.y;
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99 if (Math.abs(deltaY) > rowHeight) {
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100 // inter-row selection
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101 return deltaY>0;
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102 }
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103 // intra-row selection
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104 return start.x > stop.x;
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105 }
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106 public bool isEnclosed() {
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107 return !start.equals(stop);
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108 }
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109
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110 public bool isSelectedRow(Locator locator) {
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111 if (!isEnclosed())
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112 return false;
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113 int rowHeight = locator.heights.get(locator.rowCounter).array[0];
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114 return isSelectedRow(locator.y, rowHeight);
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115 }
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116 public bool isSelectedRow(int y, int rowHeight) {
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117 if (!isEnclosed())
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118 return false;
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119 return (y + rowHeight >= getTopOffset() &&
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120 y <= getBottomOffset());
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121 }
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122 public bool isFirstSelectionRow(Locator locator) {
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123 if (!isEnclosed())
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124 return false;
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125 int rowHeight = locator.heights.get(locator.rowCounter).array[0];
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126 return (locator.y + rowHeight >= getTopOffset() &&
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127 locator.y <= getTopOffset());
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128 }
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129 public bool isFirstSelectionRow(int y, int rowHeight) {
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130 if (!isEnclosed())
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131 return false;
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132 return (y + rowHeight >= getTopOffset() &&
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133 y <= getTopOffset());
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134 }
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135 public bool isLastSelectionRow(Locator locator) {
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136 if (!isEnclosed())
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137 return false;
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138 int rowHeight = locator.heights.get(locator.rowCounter).array[0];
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139 return (locator.y + rowHeight >=getBottomOffset() &&
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140 locator.y <= getBottomOffset());
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141 }
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142 public bool isLastSelectionRow(int y, int rowHeight) {
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143 if (!isEnclosed())
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144 return false;
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145 return (y + rowHeight >=getBottomOffset() &&
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146 y <= getBottomOffset());
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147 }
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148 }
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