phplot.php

PHP 建站工具,CMS系统,类似与oscommerce

	}

	function FindDataLimits() {
		//Text-Data is different than data-data graphs. For them what
		// we have, instead of X values, is # of records equally spaced on data.
		//text-data is passed in as $data[] = (title,y1,y2,y3,y4,...)
		//data-data is passed in as $data[] = (title,x,y1,y2,y3,y4,...) 

		$this->number_x_points = count($this->data_values);

		switch ($this->data_type) {
			case "text-data":
				$minx = 0; //valid for BAR TYPE GRAPHS ONLY
				$maxx = $this->number_x_points - 1 ;  //valid for BAR TYPE GRAPHS ONLY
				$miny = (double) $this->data_values[0][1];
				$maxy = $miny;
				if ($this->draw_x_data_labels == "") { 
					$this->draw_x_data_labels = 1;  //labels_note1: prevent both data labels and x-axis labels being both drawn and overlapping
				}
			break;
			default:  //Everything else: data-data, etc.
				$maxx = $this->data_values[0][1];
				$minx = $maxx;
				$miny = $this->data_values[0][2];
				$maxy = $miny;
				$maxy = $miny;
			break;
		}

		$max_records_per_group = 0;
		$total_records = 0;
		$mine = 0; //Maximum value for the -error bar (assume error bars always > 0) 
		$maxe = 0; //Maximum value for the +error bar (assume error bars always > 0) 

		reset($this->data_values);
		while (list($dat_key, $dat) = each($this->data_values)) {  //for each X barchart setting
		//foreach($this->data_values as $dat)  //can use foreach only in php4

			$tmp = 0;
			$total_records += count($dat) - 1; // -1 for label

			switch ($this->data_type) {
				case "text-data":
					//Find the relative Max and Min

					while (list($key, $val) = each($dat)) {
						if ($key != 0) {  //$dat[0] = label
							SetType($val,"double");
							if ($val > $maxy) {
								$maxy = $val ;
							}
							if ($val < $miny) {
								$miny = (double) $val ;
							}
						}
						$tmp++;
					}
				break;
				case "data-data":  //X-Y data is passed in as $data[] = (title,x,y,y2,y3,...) which you can use for multi-dimentional plots.

					while (list($key, $val) = each($dat)) {
						if ($key == 1) {  //$dat[0] = label
							SetType($val,"double");
							if ($val > $maxx) {
								$maxx = $val;
							} elseif ($val < $minx) {
								$minx = $val;
							}
						} elseif ($key > 1) {
							SetType($val,"double");
							if ($val > $maxy) {
								$maxy = $val ;
							} elseif ($val < $miny) {
								$miny = $val ;
							}
						}
						$tmp++;
					}
					$tmp = $tmp - 1; //# records per group
				break;
				case "data-data-error":  //Assume 2-D for now, can go higher
				//Regular X-Y data is passed in as $data[] = (title,x,y,error+,error-,y2,error2+,error2-)

					while (list($key, $val) = each($dat)) {
						if ($key == 1) {  //$dat[0] = label
							SetType($val,'double');
							if ($val > $maxx) {
								$maxx = $val;
							} elseif ($val < $minx) {
								$minx = $val;
							}
						} elseif ($key%3 == 2) {
							SetType($val,'double');
							if ($val > $maxy) {
								$maxy = $val ;
							} elseif ($val < $miny) {
								$miny = $val ;
							}
						} elseif ($key%3 == 0) {
							SetType($val,'double');
							if ($val > $maxe) {
								$maxe = $val ;
							}
						} elseif ($key%3 == 1) {
							SetType($val,'double');
							if ($val > $mine) {
								$mine = $val ;
							}
						}
						$tmp++;
					}
					$maxy = $maxy + $maxe;
					$miny = $miny - $mine; //assume error bars are always > 0

				break;
				default:
					$this->PrintError('ERROR: unknown chart type');
				break;
			}
			if ($tmp > $max_records_per_group) {
				$max_records_per_group = $tmp;
			}
		}


		$this->min_x = $minx;
		$this->max_x = $maxx;
		$this->min_y = $miny;
		$this->max_y = $maxy;


		if ($max_records_per_group > 1) {
			$this->records_per_group = $max_records_per_group - 1;
		} else {
			$this->records_per_group = 1;
		}


		//$this->data_count = $total_records ;
	} // function FindDataLimits

	function SetMargins() {
		/////////////////////////////////////////////////////////////////
		// When the image is first created - set the margins
		// to be the standard viewport.
		// The standard viewport is the full area of the view surface (or panel),
		// less a margin of 4 character heights all round for labelling.
		// It thus depends on the current character size, set by SetCharacterHeight().
		/////////////////////////////////////////////////////////////////

		$str = split("\n",$this->title_txt); 
		$nbLines = count($str); 

		if ($this->use_ttf == 1) {
			$title_size = $this->TTFBBoxSize($this->title_ttffont_size, $this->title_angle, $this->title_ttffont, 'X'); //An array
			if ($nbLines == 1) { 
				$this->y_top_margin = $title_size[1] * 4;
			} else { 
				$this->y_top_margin = $title_size[1] * ($nbLines+3);
			}

			//ajo working here
			//$x_label_size = $this->TTFBBoxSize($this->x_label_ttffont_size, 0, $this->axis_ttffont, $this->x_label_txt);

			$this->y_bot_margin = $this->x_label_height ;
			$this->x_left_margin = $this->y_label_width * 2 + $this->tick_length;
			$this->x_right_margin = 33.0; // distance between right and end of x axis in pixels 
		} else {
			$title_size = array(ImageFontWidth($this->title_font) * strlen($this->title_txt),ImageFontHeight($this->title_font));
			//$this->y_top_margin = ($title_size[1] * 4);
			if ($nbLines == 1) { 
				$this->y_top_margin = $title_size[1] * 4;
			} else { 
				$this->y_top_margin = $title_size[1] * ($nbLines+3);
			}
			if ($this->x_datalabel_angle == 90) {
				$this->y_bot_margin = 76.0; // Must be integer
			} else {
				$this->y_bot_margin = 66.0; // Must be integer
			}
			$this->x_left_margin = 77.0; // distance between left and start of x axis in pixels
			$this->x_right_margin = 33.0; // distance between right and end of x axis in pixels
		}

//exit;
		$this->x_tot_margin = $this->x_left_margin + $this->x_right_margin;
		$this->y_tot_margin = $this->y_top_margin + $this->y_bot_margin;

		if ($this->plot_max_x && $this->plot_max_y && $this->plot_area_width ) { //If data has already been analysed then set translation
			$this->SetTranslation();
		}
	}

	function SetMarginsPixels($which_lm,$which_rm,$which_tm,$which_bm) { 
		//Set the plot area using margins in pixels (left, right, top, bottom)
		$this->SetNewPlotAreaPixels($which_lm,$which_tm,($this->image_width - $which_rm),($this->image_height - $which_bm));
		return true;
	}

	function SetNewPlotAreaPixels($x1,$y1,$x2,$y2) {
		//Like in GD 0,0 is upper left set via pixel Coordinates
		$this->plot_area = array($x1,$y1,$x2,$y2);
		$this->plot_area_width = $this->plot_area[2] - $this->plot_area[0];
		$this->plot_area_height = $this->plot_area[3] - $this->plot_area[1];
		$this->y_top_margin = $this->plot_area[1];
		if ($this->plot_max_x) {
			$this->SetTranslation();
		}
		return true;
	}

	function SetPlotAreaPixels($x1,$y1,$x2,$y2) {
		//Like in GD 0,0 is upper left
		if (!$this->x_tot_margin) {
			$this->SetMargins();
		}
		if ($x2 && $y2) {
			$this->plot_area = array($x1,$y1,$x2,$y2);
		} else {
			$this->plot_area = array($this->x_left_margin, $this->y_top_margin,
								$this->image_width - $this->x_right_margin,
								$this->image_height - $this->y_bot_margin
							);
		}
		$this->plot_area_width = $this->plot_area[2] - $this->plot_area[0];
		$this->plot_area_height = $this->plot_area[3] - $this->plot_area[1];

		return true;

	}

	function SetPlotAreaWorld($xmin,$ymin,$xmax,$ymax) {
		if (($xmin == "")  && ($xmax == "")) {
			//For automatic setting of data we need $this->max_x
				if (!$this->max_y) {
					$this->FindDataLimits() ;
				}
				if ($this->data_type == 'text-data') { //labels for text-data is done at data drawing time for speed.
					$xmax = $this->max_x + 1 ;  //valid for BAR CHART TYPE GRAPHS ONLY
					$xmin = 0 ; 				//valid for BAR CHART TYPE GRAPHS ONLY
				} else {
					$xmax = $this->max_x * 1.02;
					$xmin = $this->min_x;
				}

				$ymax = ceil($this->max_y * 1.2);
				if ($this->min_y < 0) {
					$ymin = floor($this->min_y * 1.2);
				} else {
					$ymin = 0;
				}
		}

		$this->plot_min_x = $xmin;
		$this->plot_max_x = $xmax;

		if ($ymin == $ymax) {
			$ymax += 1;
		}
		if ($this->yscale_type == "log") { 
			//extra error checking
			if ($ymin <= 0) { 
				$ymin = 1;
			} 
			if ($ymax <= 0) { 
				$this->PrintError('Log plots need data greater than 0');
			}
		}
		$this->plot_min_y = $ymin;
		$this->plot_max_y = $ymax;

		if ($ymax <= $ymin) {
			$this->DrawError('Error in Data - max not gt min');
		}

//Set the boundaries of the box for plotting in world coord
//		if (!$this->x_tot_margin) { //We need to know the margins before we can calculate scale
//			$this->SetMargins();
//		}
		//For this we have to reset the scale
		if ($this->plot_area_width) {
			$this->SetTranslation();
		}

		return true;

	} //function SetPlotAreaWorld


	function PrintError($error_message) {
	// prints the error message to stdout and die
		echo "<p><b>Fatal error</b>: $error_message<p>";
		die;
	}

	function DrawError($error_message) {
	// prints the error message inline into
	// the generated image

		if (($this->img) == "") { $this->InitImage(); } ;

		$ypos = $this->image_height/2;

		if ($this->use_ttf == 1) {
			ImageRectangle($this->img, 0,0,$this->image_width,$this->image_height,ImageColorAllocate($this->img,255,255,255));
			ImageTTFText($this->img, $this->small_ttffont_size, 0, $xpos, $ypos, ImageColorAllocate($this->img,0,0,0), $this->axis_ttffont, $error_message);
		} else {
			ImageRectangle($this->img, 0,0,$this->image_width,$this->image_height,ImageColorAllocate($this->img,255,255,255));
			ImageString($this->img, $this->small_font,1,$ypos,$error_message, ImageColorAllocate($this->img,0,0,0));
		}

		$this->PrintImage();
		return true;
	}

	function TTFBBoxSize($size, $angle, $font, $string) {

		//Assume angle < 90
		$arr = ImageTTFBBox($size, 0, $font, $string);
		$flat_width  = $arr[0] - $arr[2];
		$flat_height = abs($arr[3] - $arr[5]);

			// for 90deg:
			//	$height = $arr[5] - $arr[7];
			//	$width = $arr[2] - $arr[4];

		$angle = deg2rad($angle);
		$width  = ceil(abs($flat_width*cos($angle) + $flat_height*sin($angle))); //Must be integer
		$height = ceil(abs($flat_width*sin($angle) + $flat_height*cos($angle))); //Must be integer

		return array($width, $height);
	}

	function SetXLabelHeight() {

		if ($this->use_ttf == 1) {
			//Space for the X Label
			$size = $this->TTFBBoxSize($this->x_label_ttffont_size, 0, $this->axis_ttffont, $this->x_label_txt);
			$tmp = $size[1];

			//$string = Str_Repeat('w', $this->x_datalabel_maxlength);
			$i = 0;
			$string = '';
			while ($i < $this->x_datalabel_maxlength) {
			  $string .= 'w';
			  $i++;
			}

			//Space for the axis data labels
			$size = $this->TTFBBoxSize($this->axis_ttffont_size, $this->x_datalabel_angle, $this->axis_ttffont, $string);

			$this->x_label_height = 2*$tmp + $size[1] + 4;

		} else {
			//For Non-TTF fonts we can have only angles 0 or 90
			if ($this->x_datalabel_angle == 90) {
				$this->x_label_height = $this->x_datalabel_maxlength * ImageFontWidth($this->small_font) / 1.5;
			} else {
				$this->x_label_height = 5 * ImageFontHeight($this->small_font);
			}
		}

		$this->SetMargins();

		return true;
	} //function SetXLabelHeight

	function SetYLabelWidth() {
		//$ylab = sprintf("%6.1f %s",$i,$si_units[0]);  //use for PHP2 compatibility
		//the "." is for space. It isn't actually printed
		$ylab = number_format($this->max_y, $this->y_precision, ".", ",") . $this->si_units . ".";

		if ($this->use_ttf == 1) {
			$size = $this->TTFBBoxSize($this->axis_ttffont_size, 0, $this->axis_ttffont, $ylab);
		} else {
			$size[0] = StrLen($ylab) * $this->small_font_width * .6;
		}

		$this->y_label_width = $size[0] * 2;
//echo "SYLW: $this->y_label_width<br>";
//exit;

		$this->SetMargins();
		return true;
	}

	function SetEqualXCoord() {
		//for plots that have equally spaced x variables and multiple bars per x-point.

		$space = ($this->plot_area[2] - $this->plot_area[0]) / ($this->number_x_points * 2) * $this->group_frac_width;
		$group_width = $space * 2;
		$bar_width = $group_width / $this->records_per_group;
  //I think that eventually this space variable will be replaced by just graphing x.
		$this->data_group_space = $space;
		$this->record_bar_width = $bar_width;