Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/client/ui/chart/PanControl.java @ 3974:22cd60315e08
dummy merge for repo head
author | Thomas Arendsen Hein <thomas@intevation.de> |
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date | Fri, 28 Sep 2012 12:15:45 +0200 |
parents | 80626c4a5bbf |
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rev | line source |
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551
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Added a PanControl to pan charts.
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1 package de.intevation.flys.client.client.ui.chart; |
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2 |
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3 import java.util.ArrayList; |
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4 import java.util.List; |
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5 |
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6 import com.google.gwt.core.client.GWT; |
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7 |
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8 import com.smartgwt.client.types.SelectionType; |
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9 import com.smartgwt.client.widgets.Canvas; |
553
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The MouseOut event will now finish a current pan operation.
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10 import com.smartgwt.client.widgets.Img; |
551
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11 import com.smartgwt.client.widgets.ImgButton; |
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12 import com.smartgwt.client.widgets.events.MouseDownEvent; |
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13 import com.smartgwt.client.widgets.events.MouseDownHandler; |
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14 import com.smartgwt.client.widgets.events.MouseMoveEvent; |
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15 import com.smartgwt.client.widgets.events.MouseMoveHandler; |
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16 import com.smartgwt.client.widgets.events.MouseOutEvent; |
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17 import com.smartgwt.client.widgets.events.MouseOutHandler; |
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18 import com.smartgwt.client.widgets.events.MouseUpEvent; |
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19 import com.smartgwt.client.widgets.events.MouseUpHandler; |
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20 |
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21 import de.intevation.flys.client.client.event.HasPanHandlers; |
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22 import de.intevation.flys.client.client.event.PanEvent; |
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23 import de.intevation.flys.client.client.event.PanHandler; |
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24 |
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25 |
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26 /** |
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27 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> |
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28 */ |
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29 public class PanControl |
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30 extends ImgButton |
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31 implements MouseDownHandler, MouseMoveHandler, MouseUpHandler, |
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32 MouseOutHandler, HasPanHandlers |
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33 { |
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34 protected ChartOutputTab chartTab; |
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35 |
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36 protected List<PanHandler> handlers; |
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37 |
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38 protected int[] start; |
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39 protected int[] end; |
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40 |
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41 |
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42 public PanControl(ChartOutputTab chartTab, String imageUrl) { |
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43 super(); |
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44 |
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45 this.chartTab = chartTab; |
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46 this.handlers = new ArrayList<PanHandler>(); |
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47 this.start = new int[] { -1, -1 }; |
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48 this.end = new int[] { -1, -1 }; |
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49 |
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50 String baseUrl = GWT.getHostPageBaseURL(); |
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51 setSrc(baseUrl + imageUrl); |
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52 setActionType(SelectionType.CHECKBOX); |
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53 setSize(20); |
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54 setShowRollOver(false); |
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55 setSelected(false); |
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56 |
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57 chartTab.getChartPanel().addMouseDownHandler(this); |
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58 chartTab.getChartPanel().addMouseMoveHandler(this); |
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59 chartTab.getChartPanel().addMouseUpHandler(this); |
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60 chartTab.getChartPanel().addMouseOutHandler(this); |
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61 } |
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62 |
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63 |
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64 /** |
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65 * Method used to register a new PanHandler. |
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66 * |
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67 * @param handler A new PanHandler. |
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68 */ |
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69 public void addPanHandler(PanHandler handler) { |
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70 if (handler != null) { |
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71 handlers.add(handler); |
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72 } |
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73 } |
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74 |
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75 |
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76 /** |
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77 * This event starts the dragging operation if the control is activated. |
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78 * |
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79 * @param event The mouse down event which contains the start coordinates. |
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80 */ |
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81 public void onMouseDown(MouseDownEvent event) { |
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82 if (!isSelected()) { |
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83 return; |
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84 } |
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85 |
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86 start[0] = event.getX(); |
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87 start[1] = event.getY(); |
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88 |
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89 end[0] = start[0]; |
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90 end[1] = start[1]; |
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91 } |
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92 |
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93 |
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94 /** |
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95 * This event is used to reposition the chart image based on the current |
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96 * drag operation. |
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97 * |
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98 * @param event The move event which contains the new coordinates to update |
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99 * the chart image position. |
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100 */ |
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101 public void onMouseMove(MouseMoveEvent event) { |
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102 if (!isSelected() || start[0] == -1 || start[1] == -1) { |
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103 return; |
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104 } |
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105 |
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106 int x = event.getX() - end[0]; |
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107 int y = event.getY() - end[1]; |
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108 |
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109 end[0] = end[0] + x; |
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110 end[1] = end[1] + y; |
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111 |
610
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#170 Changed the DOM manipulation while zoom and drag operation.
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112 Canvas c = chartTab.getChartImg(); |
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113 c.moveBy(x, y); |
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114 } |
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115 |
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116 |
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117 /** |
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118 * This event stops the dragging operation and fires a DragEnd event to the |
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119 * registered listeners. |
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120 * |
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121 * @param event The mouse up event which contains the end coordinates. |
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122 */ |
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123 public void onMouseUp(MouseUpEvent event) { |
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124 if (!isSelected()) { |
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125 return; |
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126 } |
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127 |
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128 end[0] = event.getX(); |
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129 end[1] = event.getY(); |
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130 |
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131 Canvas c = chartTab.getChartImg(); |
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132 c.setLeft(0); |
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133 c.setTop(0); |
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134 |
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135 fireOnPan(); |
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136 |
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137 start[0] = -1; |
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138 start[1] = -1; |
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139 } |
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140 |
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141 |
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142 /** |
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143 * This event is used to cancel the current dragging operation. |
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144 * |
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145 * @param event The mouse out event. |
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146 */ |
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147 public void onMouseOut(MouseOutEvent event) { |
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148 int x = event.getX(); |
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149 int y = event.getY(); |
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150 |
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151 if (!isSelected() || !isMouseOut(x, y) || start[0] == -1) { |
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152 return; |
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153 } |
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154 |
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155 Canvas c = chartTab.getChartImg(); |
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156 c.setLeft(0); |
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157 c.setTop(0); |
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158 |
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159 fireOnPan(); |
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160 |
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161 start[0] = -1; |
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162 start[1] = -1; |
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163 } |
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164 |
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165 |
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166 /** |
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167 * This method is required to check manually if the mouse pointer really |
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168 * moves out the chart area. The MouseOutEvent is also fired if the mouse |
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169 * goes down which doesn't seem to be correct. So, we gonna check this |
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170 * manually. |
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171 * |
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172 * @param x The x coordinate. |
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173 * @param y The y coordinate. |
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174 * |
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175 * @return true, if the mouse is really out of the chart area, otherwise |
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176 * false. |
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177 */ |
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178 protected boolean isMouseOut(int x, int y) { |
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179 Canvas chart = chartTab.getChartImg(); |
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180 |
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181 if (chart instanceof Img) { |
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182 chart = chart.getParentElement(); |
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183 } |
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184 |
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185 int left = chart.getPageLeft(); |
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186 int right = chart.getPageRight(); |
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187 int top = chart.getPageTop(); |
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188 int bottom = chart.getPageBottom(); |
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189 |
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190 if (x <= left || x >= right || y <= top || y >= bottom) { |
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191 return true; |
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192 } |
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193 |
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194 return false; |
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195 } |
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196 |
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197 |
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198 /** |
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199 * A pan event is fired to inform the registered listeners about a pan |
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200 * operation has finished. |
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201 */ |
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202 protected void fireOnPan() { |
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203 PanEvent event = new PanEvent(start, end); |
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204 |
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205 for (PanHandler handler: handlers) { |
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206 handler.onPan(event); |
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207 } |
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208 } |
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209 } |
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210 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |