PHP Image_Graph::_canvas方法代码示例

	/**
	* Generate
	* Generates the charts from the data passed into it
	*
	* @param chart Array of data and labels
	*
	* @return Void Doesn't return anything.
	*/
	function Generate($chart) {

		$this->graph->add(
				$PlotArea =& new Image_Graph_Plotarea()
		);

		$this->graph->_outputImage = false;

		switch ($chart['chart_type']) {
			case 'column':
				// Add grid
				$PlotArea->addGridY(new Image_Graph_Grid_Lines());
				$PlotArea->addGridX(new Image_Graph_Grid_Lines());

				$labels = array_shift($chart['chart_data']);
				$legend_labels = array();
				$DataSets = array();

				foreach ($chart['chart_data'] as $data) {
					$Dataset =& new Image_Graph_Dataset_Trivial();
					foreach ($data as $key => $value) {
						if (!is_numeric($value)) {
							if ($key == 0) {
								$legend_labels[] = $value;
							}
							continue;
						}

						$Dataset->addPoint($key, $value);
					}
					$DataSets[] =& $Dataset;
				}

				$PlotMultiple =& new Image_Graph_Plot_Bar_Multiple($DataSets);
				$PlotMultiple->spacing(3);
				$PlotMultiple->setXValueWidth(1);
				$Plot1 =& $PlotArea->addPlot($PlotMultiple);

				$noBorder =& new Image_Graph_Line_Solid();
				$noBorder->setThickness(0);

				// create a Y data value marker
				$Marker =& $Plot1->add(new Image_Graph_Marker_Value(IMAGE_GRAPH_VALUE_Y));
				//$Marker->setFillColor(0xFFFFFF);
				$Marker->setBorderColor(0xFFFFFF);

				$PointingMarker =& $Plot1->add(new Image_Graph_Marker_Pointing(0,-10, $Marker));
				$PointingMarker->setLineStyle($noBorder);
				$Plot1->setMarker($PointingMarker);

				$FillArray =& new Image_Graph_Fill_Array();
				foreach ($this->colors as $color) {
					$FillArray->add(new Image_Graph_Fill_Gradient(IMAGE_GRAPH_GRAD_RADIAL, eval("return 0x{$color};"), eval("return 0x{$color};"), 200));

				}
				$Plot1->setFillStyle($FillArray);

				$AxisX =& $PlotArea->getAxis(IMAGE_GRAPH_AXIS_X);
				$AxisX->setDataPreprocessor(
					new Image_Graph_DataPreprocessor_Array(
						$labels
					)
				);

				$thickAxis =& new Image_Graph_Line_Solid();
				$thickAxis->setThickness(2);

				$AxisX->setLineStyle($thickAxis);
				$AxisX->setLabelInterval(1);

				$AxisY =& $PlotArea->getAxis(IMAGE_GRAPH_AXIS_Y);
				$AxisY->setLineStyle($thickAxis);
				$AxisY->setDataPreprocessor(new Image_Graph_DataPreprocessor_Function("FormatNumber"));

				$this->graph->done();

				$canvas =& $this->graph->_canvas();

				$canvas =& $this->DrawTitle($canvas,$this->title,true);

				$this->DrawLegend($canvas,$legend_labels,'column');
			break; // case column

			case 'pie':
				$DataSet =& new Image_Graph_Dataset_Trivial();
				$Plot1 =& $PlotArea->addPlot(new Image_Graph_Plot_Pie($DataSet));
				$points = $chart['chart_data'][1];
				$labels = $chart['chart_data'][0];

				foreach ($points as $key => $value) {
					if (!is_numeric($value)) { continue; }

//.........这里部分代码省略.........