引用：http://www.oschina.net/code/snippet_12_1257
[图片] android_xy.gif
[文件] xy_plot_4_Android_src.zip ~ 57KB 下载(127)
[代码] 绘制网格线的方法
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public static void draw_the_grid(Canvas this_g, Vector these_labels) |
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{ |
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double rounded_max = 0.0; |
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double rounded_min = 0.0; |
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double rounded_max_temp; |
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Object curElt; |
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String[] cur_elt_array; |
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int left_margin_d, right_margin_d; |
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if( draw_only_this_idx == -1) |
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curElt = these_labels.elementAt(0); // default it to 1st one if non set |
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else |
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curElt = these_labels.elementAt(draw_only_this_idx); // now just the 1st elt |
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|
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cur_elt_array = (String[])curElt; |
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rounded_max = get_ceiling_or_floor (Double.parseDouble(cur_elt_array[2]) , true); |
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rounded_min = get_ceiling_or_floor (Double.parseDouble(cur_elt_array[3]) ,false); |
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// ok so now we have the max value of the set just get a cool ceiling and we go on |
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final Paint paint = new Paint(); |
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paint.setTextSize(15); |
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|
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left_margin_d = getCurTextLengthInPixels(paint, Double.toString(rounded_max)); |
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//keep the position for later drawing -- leave space for the legend |
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int p_height = 170; |
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int p_width = 220; |
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int[] tmp_draw_sizes = {2 + left_margin_d, 25,p_width - 2 - |
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left_margin_d ,p_height - 25 -5}; |
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drawSizes = tmp_draw_sizes; //keep it for later processing |
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|
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//with the mzrgins worked out draw the plotting grid |
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paint.setStyle(Paint.Style.FILL); |
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paint.setColor(Color.WHITE ); |
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|
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// Android does by coords |
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this_g.drawRect(drawSizes[0], drawSizes[1],drawSizes[0]+ |
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drawSizes[2], drawSizes[1]+ drawSizes[3] , paint); |
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|
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paint.setColor(Color.GRAY ); |
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|
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// finally draw the grid |
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|
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paint.setStyle(Paint.Style.STROKE); |
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this_g.drawRect(drawSizes[0], drawSizes[1],drawSizes[0]+ |
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drawSizes[2], drawSizes[1]+ drawSizes[3] , paint); |
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for(int i=1; i < 5 ; i++) |
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{ |
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this_g.drawLine(drawSizes[0], drawSizes[1] + |
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(i * drawSizes[3] / 5), drawSizes[0] + drawSizes[2], |
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drawSizes[1] + (i * drawSizes[3] / 5), paint); |
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this_g.drawLine(drawSizes[0]+ (i * drawSizes[2] / 5), |
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drawSizes[1], drawSizes[0] + (i * drawSizes[2] / 5), |
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drawSizes[1] + drawSizes[3], paint); |
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} |
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// good for one value |
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print_axis_values_4_grid(this_g, cur_elt_array[1] , |
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Double.toString(rounded_max) , Double.toString(rounded_min), |
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cur_elt_array[0] , 2 ,0 ); |
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|
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} // --- end of draw_grid --- |
