| 1 | package {
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| 2 | import flash.geom.Point;
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| 3 | import charts.series.dots.Point;
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| 4 |
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| 5 | public class ScreenCoords extends ScreenCoordsBase
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| 6 | {
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| 7 | private var x_range:Range;
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| 8 | private var y_range:Range;
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| 9 | private var y_right_range:Range;
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| 10 |
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| 11 | // position of the zero line
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| 12 | //public var zero:Number=0;
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| 13 | //public var steps:Number=0;
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| 14 |
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| 15 | // tick_offset is set by 3D axis
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| 16 | public var tick_offset:Number;
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| 17 | private var x_offset:Boolean;
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| 18 | private var y_offset:Boolean;
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| 19 | private var bar_groups:Number;
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| 20 |
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| 21 |
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| 22 | public function ScreenCoords( top:Number, left:Number, right:Number, bottom:Number,
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| 23 | y_axis_range:Range,
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| 24 | y_axis_right_range:Range,
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| 25 | x_axis_range:Range,
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| 26 | x_left_label_width:Number, x_right_label_width:Number,
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| 27 | three_d:Boolean )
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| 28 | {
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| 29 | super( top, left, right, bottom );
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| 30 |
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| 31 | var tmp_left:Number = left;
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| 32 |
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| 33 | this.x_range = x_axis_range;
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| 34 | this.y_range = y_axis_range;
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| 35 | this.y_right_range = y_axis_right_range;
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| 36 |
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| 37 | // tr.ace( '-----' );
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| 38 | // tr.ace( this.x_range.count() );
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| 39 | // tr.ace( this.y_range.count() );
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| 40 |
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| 41 |
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| 42 | if( x_range ) {
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| 43 | right = this.jiggle( left, right, x_right_label_width, x_axis_range.count() );
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| 44 | tmp_left = this.shrink_left( left, right, x_left_label_width, x_axis_range.count() );
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| 45 | }
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| 46 |
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| 47 | this.top = top;
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| 48 | this.left = Math.max(left, tmp_left);
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| 49 |
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| 50 | // round this down to the nearest int:
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| 51 | this.right = Math.floor( right );
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| 52 | this.bottom = bottom;
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| 53 | this.width = this.right-this.left;
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| 54 | this.height = bottom-top;
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| 55 |
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| 56 | if( three_d )
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| 57 | {
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| 58 | // tell the box object that the
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| 59 | // X axis labels need to be offset
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| 60 | this.tick_offset = 12;
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| 61 | }
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| 62 | else
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| 63 | this.tick_offset = 0;
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| 64 |
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| 65 | //
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| 66 | // x_offset:
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| 67 | //
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| 68 | // False True
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| 69 | //
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| 70 | // | |
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| 71 | // | |
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| 72 | // | |
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| 73 | // +--+--+--+ |-+--+--+--+-+
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| 74 | // 0 1 2 3 0 1 2 3
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| 75 | //
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| 76 |
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| 77 | // PIE charts don't have these:
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| 78 | if( x_axis_range ) {
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| 79 | this.x_offset = x_axis_range.offset;
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| 80 | }
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| 81 | if( y_axis_range ) {
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| 82 | // tr.aces( 'YYYY', y_axis_range.offset );
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| 83 | this.y_offset = y_axis_range.offset;
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| 84 | }
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| 85 |
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| 86 | this.bar_groups = 1;
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| 87 | }
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| 88 |
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| 89 | //
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| 90 | // if the last X label is wider than the chart area, the last few letters will
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| 91 | // be outside the drawing area. So we make the chart width smaller so the label
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| 92 | // will fit into the screen.
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| 93 | //
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| 94 | //DZ: this implementation chops off the last label on scatter charts because it
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| 95 | // assumes the label is centered on the last "item" (like a bar) instead of
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| 96 | // at the max edge of the plot.
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| 97 | public function jiggle_original( left:Number, right:Number, x_label_width:Number, count:Number ): Number {
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| 98 | var r:Number = 0;
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| 99 |
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| 100 | if( x_label_width != 0 )
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| 101 | {
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| 102 | var item_width:Number = (right-left) / count;
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| 103 | r = right - (item_width / 2);
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| 104 | var new_right:Number = right;
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| 105 |
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| 106 | // while the right most X label is off the edge of the
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| 107 | // Stage, move the box.right - 1
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| 108 | while( r+(x_label_width/2) > right )
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| 109 | {
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| 110 | new_right -= 1;
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| 111 | // changing the right also changes the item_width:
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| 112 | item_width = (new_right-left) / count;
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| 113 | r = new_right-(item_width/2);
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| 114 | }
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| 115 | right = new_right;
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| 116 | }
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| 117 | return right;
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| 118 | }
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| 119 |
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| 120 | //DZ: this implementation probably add white space on the right side of a
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| 121 | // non-scatter type plot because it assumes that the label is centered at
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| 122 | // the max edge of the plot instead of centered on the last "item"
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| 123 | // (like a bar)
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| 124 | public function jiggle( left:Number, right:Number, x_label_width:Number, count:Number ): Number {
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| 125 | return right - (x_label_width / 2);
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| 126 | }
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| 127 |
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| 128 | //
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| 129 | // if the left label is truncated, shrink the box until
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| 130 | // it fits onto the screen
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| 131 | //
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| 132 | public function shrink_left( left:Number, right:Number, x_label_width:Number, count:Number ): Number {
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| 133 | var pos:Number = 0;
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| 134 |
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| 135 | if( x_label_width != 0 )
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| 136 | {
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| 137 | var item_width:Number = (right-left) / count;
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| 138 | pos = left+(item_width/2);
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| 139 | var new_left:Number = left;
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| 140 |
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| 141 | // while the left most label is hanging off the Stage
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| 142 | // move the box.left in one pixel:
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| 143 | while( pos-(x_label_width/2) < 0 )
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| 144 | {
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| 145 | new_left += 1;
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| 146 | // changing the left also changes the item_width:
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| 147 | item_width = (right-new_left) / count;
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| 148 | pos = new_left+(item_width/2);
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| 149 | }
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| 150 | left = new_left;
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| 151 | }
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| 152 |
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| 153 | return left;
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| 154 |
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| 155 | }
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| 156 |
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| 157 | //
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| 158 | // the bottom point of a bar:
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| 159 | // min=-100 and max=100, use b.zero
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| 160 | // min = 10 and max = 20, use b.bottom
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| 161 | //
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| 162 | public override function get_y_bottom( right_axis:Boolean = false ):Number
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| 163 | {
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| 164 | //
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| 165 | // may have min=10, max=20, or
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| 166 | // min = 20, max = -20 (upside down chart)
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| 167 | //
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| 168 | var r:Range = right_axis ? this.y_right_range : this.y_range;
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| 169 |
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| 170 | var min:Number = r.min;
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| 171 | var max:Number = r.max;
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| 172 | min = Math.min( min, max );
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| 173 |
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| 174 | return this.get_y_from_val( Math.max(0,min), right_axis );
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| 175 | }
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| 176 |
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| 177 | // takes a value and returns the screen Y location
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| 178 | public function getY_old( i:Number, right_axis:Boolean ):Number
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| 179 | {
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| 180 | var r:Range = right_axis ? this.y_right_range : this.y_range;
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| 181 |
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| 182 | var steps:Number = this.height / (r.count());// ( right_axis ));
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| 183 |
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| 184 | // find Y pos for value=zero
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| 185 | var y:Number = this.bottom-(steps*(r.min*-1));
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| 186 |
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| 187 | // move up (-Y) to our point (don't forget that y_min will shift it down)
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| 188 | y -= i*steps;
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| 189 | return y;
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| 190 | }
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| 191 |
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| 192 | //
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| 193 | // takes a value and returns the screen Y location
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| 194 | // what is the Y range?
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| 195 | //
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| 196 | // Horizontal bar charts are offset. Note:
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| 197 | // step = 1
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| 198 | // and step/2 is offset at the bottom and top
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| 199 | // so we add 1*step so we can calculate:
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| 200 | //
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| 201 | // offset = true
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| 202 | //
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| 203 | // |
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| 204 | // X -|==========
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| 205 | // |
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| 206 | // Y -|===
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| 207 | // |
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| 208 | // Z -|========
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| 209 | // +--+--+--+--+--+--
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| 210 | //
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| 211 | // offset = false
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| 212 | //
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| 213 | // 2 -|
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| 214 | // |
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| 215 | // 1 -| 0--0--0--0--0
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| 216 | // |
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| 217 | // 0 -+--+--+--+--+--+--
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| 218 | //
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| 219 | public override function get_y_from_val( i:Number, right_axis:Boolean = false ):Number {
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| 220 |
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| 221 | var r:Range = right_axis ? this.y_right_range : this.y_range;
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| 222 |
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| 223 | var steps:Number = this.height / r.count();
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| 224 |
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| 225 | // tr.ace( 'off' );
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| 226 | // tr.ace( this.y_offset.offset );
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| 227 | // tr.ace( count );
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| 228 |
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| 229 | var tmp:Number = 0;
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| 230 | if( this.y_offset )
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| 231 | tmp = (steps / 2);
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| 232 |
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| 233 | // move up (-Y) to our point (don't forget that y_min will shift it down)
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| 234 | return this.bottom-tmp-(r.min-i)*steps*-1;
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| 235 | }
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| 236 |
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| 237 | public override function get_get_x_from_pos_and_y_from_val( index:Number, y:Number, right_axis:Boolean = false ):flash.geom.Point {
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| 238 |
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| 239 | return new flash.geom.Point(
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| 240 | this.get_x_from_pos( index ),
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| 241 | this.get_y_from_val( y, right_axis ) );
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| 242 | }
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| 243 |
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| 244 | public function width_():Number
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| 245 | {
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| 246 | return this.right-this.left_();
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| 247 | }
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| 248 |
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| 249 | private function left_():Number
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| 250 | {
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| 251 | var padding_left:Number = this.tick_offset;
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| 252 | return this.left+padding_left;
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| 253 | }
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| 254 |
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| 255 | //
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| 256 | // Scatter and Horizontal Bar charts use this:
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| 257 | //
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| 258 | // get the x position by value
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| 259 | // (e.g. what is the x position for -5 ?)
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| 260 | //
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| 261 | public override function get_x_from_val( i:Number ):Number {
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| 262 | // Patch from DZ:
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| 263 | var rev:Boolean = this.x_range.min > this.x_range.max;
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| 264 | var count:Number = this.x_range.count();
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| 265 | count += (rev && this.x_range.offset) ? -2 : 0;
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| 266 | var item_width:Number = this.width_() / count;
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| 267 | // end DZ
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| 268 |
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| 269 |
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| 270 | var pos:Number = i-this.x_range.min;
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| 271 |
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| 272 | var tmp:Number = 0;
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| 273 | if( this.x_offset )
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| 274 | tmp = Math.abs(item_width/2);
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| 275 |
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| 276 | return this.left_()+tmp+(pos*item_width);
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| 277 | }
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| 278 |
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| 279 | //
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| 280 | // get the x location of the n'th item
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| 281 | //
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| 282 | public override function get_x_from_pos( i:Number ):Number {
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| 283 | // DZ:
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| 284 | // var item_width:Number = Math.abs(this.width_() / this.x_range.count());
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| 285 | var rev:Boolean = this.x_range.min > this.x_range.max;
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| 286 | var count:Number = this.x_range.count();
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| 287 | count += (rev && this.x_range.offset) ? -2 : 0;
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| 288 | var item_width:Number = Math.abs(this.width_() / count);
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| 289 |
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| 290 | var tmp:Number = 0;
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| 291 | if( this.x_offset )
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| 292 | tmp = (item_width/2);
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| 293 |
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| 294 | return this.left_()+tmp+(i*item_width);
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| 295 | }
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| 296 |
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| 297 | //
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| 298 | // get the position of the n'th X axis tick
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| 299 | //
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| 300 | public function get_x_tick_pos( i:Number ):Number
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| 301 | {
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| 302 | return this.get_x_from_pos(i) - this.tick_offset;
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| 303 | }
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| 304 |
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| 305 |
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| 306 | //
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| 307 | // make a point object, using the absolute values (e.g. -5,-5 )
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| 308 | /*
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| 309 | public function make_point_2( x:Number, y:Number, right_axis:Boolean ):charts.Elements.Point
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| 310 | {
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| 311 | return new charts.Elements.Point(
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| 312 | this.get_x_from_val( x ),
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| 313 | this.get_y_from_val( y, right_axis )
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| 314 |
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| 315 | // whats this for?
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| 316 | //,y
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| 317 | );
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| 318 | }*/
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| 319 |
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| 320 | public function set_bar_groups( n:Number ): void {
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| 321 | this.bar_groups = n;
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| 322 | }
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| 323 |
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| 324 | //
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| 325 | // index: the n'th bar from the left
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| 326 | //
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| 327 | public function get_bar_coords( index:Number, group:Number ):Object {
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| 328 | var item_width:Number = this.width_() / this.x_range.count();
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| 329 |
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| 330 | // the bar(s) have gaps between them:
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| 331 | var bar_set_width:Number = item_width*0.8;
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| 332 |
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| 333 | // get the margin between sets of bars:
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| 334 | var tmp:Number = 0;
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| 335 | if( this.x_offset )
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| 336 | tmp = item_width;
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| 337 |
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| 338 | // 1 bar == 100% wide, 2 bars = 50% wide each
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| 339 | var bar_width:Number = bar_set_width / this.bar_groups;
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| 340 | //bar_width -= 0.001; // <-- hack so bars don't quite touch
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| 341 |
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| 342 | var bar_left:Number = this.left_()+((tmp-bar_set_width)/2);
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| 343 | var left:Number = bar_left+(index*item_width);
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| 344 | left += bar_width * group;
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| 345 |
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| 346 | return { x:left, width:bar_width };
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| 347 | }
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| 348 |
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| 349 | public function get_horiz_bar_coords( index:Number, group:Number ):Object {
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| 350 |
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| 351 | // split the height into equal heights for each bar
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| 352 | var bar_width:Number = this.height / this.y_range.count();
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| 353 |
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| 354 | // the bar(s) have gaps between them:
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| 355 | var bar_set_width:Number = bar_width*0.8;
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| 356 |
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| 357 | // 1 bar == 100% wide, 2 bars = 50% wide each
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| 358 | var group_width:Number = bar_set_width / this.bar_groups;
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| 359 |
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| 360 | var bar_top:Number = this.top+((bar_width-bar_set_width)/2);
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| 361 | var top:Number = bar_top+(index*bar_width);
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| 362 | top += group_width * group;
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| 363 |
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| 364 | return { y:top, width:group_width };
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| 365 | }
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| 366 |
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| 367 |
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| 368 | public function makePointHLC( x:Number, high:Number, close:Number, low:Number, right_axis:Boolean, group:Number, group_count:Number )
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| 369 | :PointHLC {
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| 370 |
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| 371 | var item_width:Number = this.width_() / this.x_range.count();
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| 372 | // the bar(s) have gaps between them:
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| 373 | var bar_set_width:Number = item_width*1;
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| 374 |
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| 375 | // get the margin between sets of bars:
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| 376 | var bar_left:Number = this.left_()+((item_width-bar_set_width)/2);
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| 377 | // 1 bar == 100% wide, 2 bars = 50% wide each
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| 378 | var bar_width:Number = bar_set_width/group_count;
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| 379 |
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| 380 | var left:Number = bar_left+(x*item_width);
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| 381 | left += bar_width*group;
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| 382 |
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| 383 | return new PointHLC(
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| 384 | left,
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| 385 | this.get_y_from_val( high, right_axis ),
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| 386 | this.get_y_from_val( close, right_axis ),
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| 387 | this.get_y_from_val( low, right_axis ),
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| 388 | high,
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| 389 | bar_width
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| 390 | // ,close
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| 391 | );
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| 392 |
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| 393 | }
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| 394 | }
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| 395 | }
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