1 | define(["dojo/_base/lang", "dojo/_base/declare", "dojo/_base/connect", |
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2 | "../Element", "./_PlotEvents", "dojo/_base/array", |
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3 | "../scaler/primitive", "./common", "dojox/gfx/fx"], |
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4 | function(lang, declare, hub, Element, PlotEvents, arr, primitive, common, fx){ |
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5 | /*===== |
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6 | var Element = dojox.charting.Element; |
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7 | var PlotEvents = dojox.charting.plot2d._PlotEvents; |
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8 | dojox.charting.plot2d.__PlotCtorArgs = function(){ |
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9 | // summary: |
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10 | // The base keyword arguments object for plot constructors. |
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11 | // Note that the parameters for this may change based on the |
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12 | // specific plot type (see the corresponding plot type for |
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13 | // details). |
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14 | } |
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15 | =====*/ |
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16 | return declare("dojox.charting.plot2d.Base", [Element, PlotEvents], { |
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17 | constructor: function(chart, kwArgs){ |
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18 | // summary: |
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19 | // Create a base plot for charting. |
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20 | // chart: dojox.chart.Chart |
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21 | // The chart this plot belongs to. |
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22 | // kwArgs: dojox.charting.plot2d.__PlotCtorArgs? |
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23 | // An optional arguments object to help define the plot. |
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24 | this.zoom = null, |
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25 | this.zoomQueue = []; // zooming action task queue |
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26 | this.lastWindow = {vscale: 1, hscale: 1, xoffset: 0, yoffset: 0}; |
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27 | }, |
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28 | clear: function(){ |
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29 | // summary: |
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30 | // Clear out all of the information tied to this plot. |
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31 | // returns: dojox.charting.plot2d.Base |
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32 | // A reference to this plot for functional chaining. |
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33 | this.series = []; |
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34 | this._hAxis = null; |
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35 | this._vAxis = null; |
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36 | this.dirty = true; |
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37 | return this; // dojox.charting.plot2d.Base |
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38 | }, |
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39 | setAxis: function(axis){ |
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40 | // summary: |
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41 | // Set an axis for this plot. |
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42 | // axis: dojox.charting.axis2d.Base |
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43 | // The axis to set. |
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44 | // returns: dojox.charting.plot2d.Base |
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45 | // A reference to this plot for functional chaining. |
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46 | if(axis){ |
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47 | this[axis.vertical ? "_vAxis" : "_hAxis"] = axis; |
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48 | } |
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49 | return this; // dojox.charting.plot2d.Base |
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50 | }, |
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51 | toPage: function(coord){ |
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52 | // summary: |
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53 | // Compute page coordinates from plot axis data coordinates. |
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54 | // coord: Object? |
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55 | // The coordinates in plot axis data coordinate space. For cartesian charts that is of the following form: |
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56 | // `{ hAxisName: 50, vAxisName: 200 }` |
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57 | // If not provided return the tranform method instead of the result of the transformation. |
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58 | // returns: Object |
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59 | // The resulting page pixel coordinates. That is of the following form: |
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60 | // `{ x: 50, y: 200 }` |
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61 | var ah = this._hAxis, av = this._vAxis, |
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62 | sh = ah.getScaler(), sv = av.getScaler(), |
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63 | th = sh.scaler.getTransformerFromModel(sh), |
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64 | tv = sv.scaler.getTransformerFromModel(sv), |
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65 | c = this.chart.getCoords(), |
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66 | o = this.chart.offsets, dim = this.chart.dim; |
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67 | var t = function(coord){ |
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68 | var r = {}; |
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69 | r.x = th(coord[ah.name]) + c.x + o.l; |
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70 | r.y = c.y + dim.height - o.b - tv(coord[av.name]); |
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71 | return r; |
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72 | }; |
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73 | // if no coord return the function so that we can capture the current transforms |
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74 | // and reuse them later on |
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75 | return coord?t(coord):t; |
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76 | }, |
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77 | toData: function(coord){ |
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78 | // summary: |
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79 | // Compute plot axis data coordinates from page coordinates. |
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80 | // coord: Object |
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81 | // The pixel coordinate in page coordinate space. That is of the following form: |
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82 | // `{ x: 50, y: 200 }` |
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83 | // If not provided return the tranform method instead of the result of the transformation. |
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84 | // returns: Object |
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85 | // The resulting plot axis data coordinates. For cartesian charts that is of the following form: |
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86 | // `{ hAxisName: 50, vAxisName: 200 }` |
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87 | var ah = this._hAxis, av = this._vAxis, |
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88 | sh = ah.getScaler(), sv = av.getScaler(), |
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89 | th = sh.scaler.getTransformerFromPlot(sh), |
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90 | tv = sv.scaler.getTransformerFromPlot(sv), |
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91 | c = this.chart.getCoords(), |
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92 | o = this.chart.offsets, dim = this.chart.dim; |
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93 | var t = function(coord){ |
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94 | var r = {}; |
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95 | r[ah.name] = th(coord.x - c.x - o.l); |
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96 | r[av.name] = tv(c.y + dim.height - coord.y - o.b); |
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97 | return r; |
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98 | }; |
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99 | // if no coord return the function so that we can capture the current transforms |
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100 | // and reuse them later on |
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101 | return coord?t(coord):t; |
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102 | }, |
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103 | addSeries: function(run){ |
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104 | // summary: |
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105 | // Add a data series to this plot. |
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106 | // run: dojox.charting.Series |
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107 | // The series to be added. |
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108 | // returns: dojox.charting.plot2d.Base |
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109 | // A reference to this plot for functional chaining. |
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110 | this.series.push(run); |
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111 | return this; // dojox.charting.plot2d.Base |
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112 | }, |
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113 | getSeriesStats: function(){ |
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114 | // summary: |
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115 | // Calculate the min/max on all attached series in both directions. |
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116 | // returns: Object |
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117 | // {hmin, hmax, vmin, vmax} min/max in both directions. |
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118 | return common.collectSimpleStats(this.series); |
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119 | }, |
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120 | calculateAxes: function(dim){ |
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121 | // summary: |
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122 | // Stub function for running the axis calculations (depricated). |
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123 | // dim: Object |
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124 | // An object of the form { width, height } |
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125 | // returns: dojox.charting.plot2d.Base |
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126 | // A reference to this plot for functional chaining. |
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127 | this.initializeScalers(dim, this.getSeriesStats()); |
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128 | return this; // dojox.charting.plot2d.Base |
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129 | }, |
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130 | isDirty: function(){ |
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131 | // summary: |
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132 | // Returns whether or not this plot needs to be rendered. |
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133 | // returns: Boolean |
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134 | // The state of the plot. |
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135 | return this.dirty || this._hAxis && this._hAxis.dirty || this._vAxis && this._vAxis.dirty; // Boolean |
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136 | }, |
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137 | isDataDirty: function(){ |
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138 | // summary: |
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139 | // Returns whether or not any of this plot's data series need to be rendered. |
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140 | // returns: Boolean |
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141 | // Flag indicating if any of this plot's series are invalid and need rendering. |
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142 | return arr.some(this.series, function(item){ return item.dirty; }); // Boolean |
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143 | }, |
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144 | performZoom: function(dim, offsets){ |
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145 | // summary: |
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146 | // Create/alter any zooming windows on this plot. |
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147 | // dim: Object |
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148 | // An object of the form { width, height }. |
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149 | // offsets: Object |
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150 | // An object of the form { l, r, t, b }. |
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151 | // returns: dojox.charting.plot2d.Base |
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152 | // A reference to this plot for functional chaining. |
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153 | |
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154 | // get current zooming various |
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155 | var vs = this._vAxis.scale || 1, |
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156 | hs = this._hAxis.scale || 1, |
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157 | vOffset = dim.height - offsets.b, |
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158 | hBounds = this._hScaler.bounds, |
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159 | xOffset = (hBounds.from - hBounds.lower) * hBounds.scale, |
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160 | vBounds = this._vScaler.bounds, |
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161 | yOffset = (vBounds.from - vBounds.lower) * vBounds.scale, |
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162 | // get incremental zooming various |
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163 | rVScale = vs / this.lastWindow.vscale, |
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164 | rHScale = hs / this.lastWindow.hscale, |
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165 | rXOffset = (this.lastWindow.xoffset - xOffset)/ |
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166 | ((this.lastWindow.hscale == 1)? hs : this.lastWindow.hscale), |
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167 | rYOffset = (yOffset - this.lastWindow.yoffset)/ |
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168 | ((this.lastWindow.vscale == 1)? vs : this.lastWindow.vscale), |
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169 | |
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170 | shape = this.group, |
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171 | anim = fx.animateTransform(lang.delegate({ |
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172 | shape: shape, |
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173 | duration: 1200, |
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174 | transform:[ |
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175 | {name:"translate", start:[0, 0], end: [offsets.l * (1 - rHScale), vOffset * (1 - rVScale)]}, |
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176 | {name:"scale", start:[1, 1], end: [rHScale, rVScale]}, |
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177 | {name:"original"}, |
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178 | {name:"translate", start: [0, 0], end: [rXOffset, rYOffset]} |
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179 | ]}, this.zoom)); |
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180 | |
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181 | lang.mixin(this.lastWindow, {vscale: vs, hscale: hs, xoffset: xOffset, yoffset: yOffset}); |
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182 | //add anim to zooming action queue, |
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183 | //in order to avoid several zooming action happened at the same time |
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184 | this.zoomQueue.push(anim); |
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185 | //perform each anim one by one in zoomQueue |
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186 | hub.connect(anim, "onEnd", this, function(){ |
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187 | this.zoom = null; |
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188 | this.zoomQueue.shift(); |
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189 | if(this.zoomQueue.length > 0){ |
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190 | this.zoomQueue[0].play(); |
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191 | } |
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192 | }); |
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193 | if(this.zoomQueue.length == 1){ |
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194 | this.zoomQueue[0].play(); |
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195 | } |
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196 | return this; // dojox.charting.plot2d.Base |
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197 | }, |
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198 | render: function(dim, offsets){ |
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199 | // summary: |
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200 | // Render the plot on the chart. |
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201 | // dim: Object |
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202 | // An object of the form { width, height }. |
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203 | // offsets: Object |
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204 | // An object of the form { l, r, t, b }. |
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205 | // returns: dojox.charting.plot2d.Base |
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206 | // A reference to this plot for functional chaining. |
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207 | return this; // dojox.charting.plot2d.Base |
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208 | }, |
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209 | getRequiredColors: function(){ |
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210 | // summary: |
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211 | // Get how many data series we have, so we know how many colors to use. |
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212 | // returns: Number |
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213 | // The number of colors needed. |
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214 | return this.series.length; // Number |
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215 | }, |
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216 | initializeScalers: function(dim, stats){ |
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217 | // summary: |
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218 | // Initializes scalers using attached axes. |
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219 | // dim: Object: |
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220 | // Size of a plot area in pixels as {width, height}. |
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221 | // stats: Object: |
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222 | // Min/max of data in both directions as {hmin, hmax, vmin, vmax}. |
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223 | // returns: dojox.charting.plot2d.Base |
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224 | // A reference to this plot for functional chaining. |
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225 | if(this._hAxis){ |
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226 | if(!this._hAxis.initialized()){ |
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227 | this._hAxis.calculate(stats.hmin, stats.hmax, dim.width); |
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228 | } |
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229 | this._hScaler = this._hAxis.getScaler(); |
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230 | }else{ |
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231 | this._hScaler = primitive.buildScaler(stats.hmin, stats.hmax, dim.width); |
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232 | } |
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233 | if(this._vAxis){ |
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234 | if(!this._vAxis.initialized()){ |
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235 | this._vAxis.calculate(stats.vmin, stats.vmax, dim.height); |
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236 | } |
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237 | this._vScaler = this._vAxis.getScaler(); |
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238 | }else{ |
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239 | this._vScaler = primitive.buildScaler(stats.vmin, stats.vmax, dim.height); |
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240 | } |
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241 | return this; // dojox.charting.plot2d.Base |
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242 | } |
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243 | }); |
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244 | }); |
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