jpgraph.php

来自「eGroupWare is a multi-user, web-based gr」· PHP 代码 · 共 1,955 行 · 第 1/5 页

	    if( $this->title_adjust=="high" )
		$this->title->Pos($this->img->width-$this->img->right_margin,$y,"right","top");
	    elseif($this->title_adjust=="middle") 
		$this->title->Pos(($this->img->width-$this->img->left_margin-$this->img->right_margin)/2+$this->img->left_margin,$y,"center","top");
	    elseif($this->title_adjust=="low")
		$this->title->Pos($this->img->left_margin,$y,"left","top");
	}
	elseif( $this->scale->type == "y" ) {
	    // Add line weight to the height of the axis since
	    // the x-axis could have a width>1 and we want the axis to fit nicely together.
	    $this->img->FilledRectangle($pos-$this->weight+1,$this->img->top_margin,
	    $pos,$this->img->height-$this->img->bottom_margin+$this->weight-1);
	    $x=$pos ;
	    if( $this->title_side == SIDE_LEFT ) {
		$x -= $this->title_margin;
		$halign="right";
	    }
	    else {
		$x += $this->title_margin;
		$halign="left";
	    }
	    if( $this->title_adjust=="high" ) 
		$this->title->Pos($x,$this->img->top_margin,$halign,"top"); 
	    elseif($this->title_adjust=="middle" || $this->title_adjust=="center")  
		$this->title->Pos($x,($this->img->height-$this->img->top_margin-$this->img->bottom_margin)/2+$this->img->top_margin,$halign,"center");
	    elseif($this->title_adjust=="low")
		$this->title->Pos($x,$this->img->height-$this->img->bottom_margin,$halign,"bottom");				
	}
	$this->scale->ticks->Stroke($this->img,$this->scale,$pos);
	$this->StrokeLabels($pos);
	$this->title->Stroke($this->img);
    }

    // Position for axis line on the "other" scale
    function SetPos($aPosOnOtherScale) {
	$this->pos=$aPosOnOtherScale;
    }
	
    // Specify the angle for the tick labels
    function SetLabelAngle($aAngle) {
	$this->label_angle = $aAngle;
    }
	
//---------------
// PRIVATE METHODS	
    // Draw all the tick labels on major tick marks
    function StrokeLabels($aPos,$aMinor=false) {
	$this->img->SetColor($this->label_color);
	$this->img->SetFont($this->font_family,$this->font_style,$this->font_size);
	$yoff=$this->img->GetFontHeight()/2;

	// Only draw labels at major tick marks
	$nbr = count($this->scale->ticks->maj_ticks_label);

	// We have the option to not-display the very first mark
	// (Usefull when the first label might interfere with another
	// axis.)
	if( $this->show_first_label ) $start=0;
	else $start=1;
			
	// Note. the $limit is only used for the x axis since we
	// might otherwise overshoot if the scale has been centered
	// This is due to us "loosing" the last tick mark if we center.
	//if( $this->scale->type=="x" )
	//	$limit=$this->img->width-$this->img->right_margin;
	//else
	//	$limit=$this->img->height;
				
	// $i holds the current index for the label
	$i=$start; 
		
	// Now run through all labels making sure we don't overshoot the end
	// of the scale.	
	while( $i<$nbr ) {
	    // $tpos holds the absolute text position for the label
	    $tpos=$this->scale->ticks->maj_ticklabels_pos[$i];															
	    // we only draw every $label_step label
	    if( ($i % $this->label_step)==0 ) {
				
				// If the label has been specified use that and in other case
				// just label the mark with the actual scale value 
		$m=$this->scale->ticks->GetMajor();
				
				// ticks_label has an entry for each data point
		if( isset($this->ticks_label[$i*$m]) )
		    $label=$this->ticks_label[$i*$m];
		else
		    $label=$this->scale->ticks->maj_ticks_label[$i];
					
		if( $this->scale->type == "x" ) {
		    if( $this->label_angle==0 || $this->label_angle==90 ) 
			$this->img->SetTextAlign("center","top");
		    else
			$this->img->SetTextAlign("topanchor","top");
		    $this->img->StrokeText($tpos,$aPos+$this->tick_label_margin,$label,$this->label_angle);
		}
		else {
		    // scale->type == "y"
		    if( $this->label_angle!=0 ) 
			JpGraphError::Raise("<b>JpGraph Error:</b> Labels at an angle are not supported on Y-axis");
		    if( $this->labelPos == 0 ) { // To the left of y-axis					
			$this->img->SetTextAlign("right","center");
			$this->img->StrokeText($aPos-$this->tick_label_margin,$tpos,$label);					
		    }
		    else { // To the right of the y-axis
			$this->img->SetTextAlign("left","center");
			$this->img->StrokeText($aPos+$this->tick_label_margin,$tpos,$label);					
		    }
		}
	    }
	    ++$i;	
	}								
    }			

} // Class

//===================================================
// CLASS Ticks
// Description: Abstract base class for drawing linear and logarithmic
// tick marks on axis
//===================================================
class Ticks {
    var $minor_abs_size=3, $major_abs_size=5;
    var $direction=1; // Should ticks be in(=1) the plot area or outside (=-1)?
    var $scale;
    var $is_set=false;
    var $precision=-1;
    var $supress_zerolabel=false,$supress_first=false;
    var $supress_last=false,$supress_tickmarks=false,$supress_minor_tickmarks=false;
    var $mincolor="",$majcolor="";
    var $weight=1;
    var $label_formatstr="";   // C-style format string to use for labels
    var $label_formfunc="";


//---------------
// CONSTRUCTOR
    function Ticks(&$aScale) {
	$this->scale=&$aScale;
    }

//---------------
// PUBLIC METHODS	
    // Set format string for automatic labels
    function SetLabelFormat($aFormatString) {
	$this->label_formatstr=$aFormatString;
    }
	
    function SetFormatCallback($aCallbackFuncName) {
	$this->label_formfunc = $aCallbackFuncName;
    }
	
    // Don't display the first zero label
    function SupressZeroLabel($aFlag=true) {
	$this->supress_zerolabel=$aFlag;
    }
	
    // Don't display minor tick marks
    function SupressMinorTickMarks($aHide=true) {
	$this->supress_minor_tickmarks=$aHide;
    }
	
    // Don't display major tick marks
    function SupressTickMarks($aHide=true) {
	$this->supress_tickmarks=$aHide;
    }
	
    // Hide the first tick mark
    function SupressFirst($aHide=true) {
	$this->supress_first=$aHide;
    }
	
    // Hide the last tick mark
    function SupressLast($aHide=true) {
	$this->supress_last=$aHide;
    }

    // Size (in pixels) of minor tick marks
    function GetMinTickAbsSize() {
	return $this->minor_abs_size;
    }
	
    // Size (in pixels) of major tick marks
    function GetMajTickAbsSize() {
	return $this->major_abs_size;		
    }
	
    // Have the ticks been specified
    function IsSpecified() {
	return $this->is_set;
    }
	
    // Set the distance between major and minor tick marks
    function Set($aMaj,$aMin) {
	// "Virtual method"
	// Should be implemented by the concrete subclass
	// if any action is wanted.
    }
	
    // Specify number of decimals in automtic labels
    // Deprecated from 1.4. Use SetFormatString() instead
    function SetPrecision($aPrecision) {
	$this->precision=$aPrecision;
    }
	
    // Which side of the axis should the ticks be on
    function SetDirection($aSide=SIDE_RIGHT) {
	$this->direction=$aSide;
    }
	
    // Set colors for major and minor tick marks
    function SetMarkColor($aMajorColor,$aMinorColor="") {
	$this->majcolor=$aMajorColor;
		
	// If not specified use same as major
	if( $aMinorColor=="" ) 
	    $this->mincolor=$aMajorColor;
	else
	    $this->mincolor=$aMinorColor;
    }
	
    function SetWeight($aWeight) {
	$this->weight=$aWeight;
    }
	
} // Class

//===================================================
// CLASS LinearTicks
// Description: Draw linear ticks on axis
//===================================================
class LinearTicks extends Ticks {
    var $minor_step=1, $major_step=2;
    var $xlabel_offset=0,$xtick_offset=0;
    var $label_offset=0; // What offset should the displayed label have
    // i.e should we display 0,1,2 or 1,2,3,4 or 2,3,4 etc
    var $text_label_start=0;
//---------------
// CONSTRUCTOR
    function LinearTicks() {
	// Empty
    }

//---------------
// PUBLIC METHODS	
	
	
    // Return major step size in world coordinates
    function GetMajor() {
	return $this->major_step;
    }
	
    // Return minor step size in world coordinates
    function GetMinor() {
	return $this->minor_step;
    }
	
    // Set Minor and Major ticks (in world coordinates)
    function Set($aMajStep,$aMinStep) {
	if( $aMajStep <= 0 || $aMinStep <= 0 ) {
	    JpGraphError::Raise("<b>JpGraph Error:</b> Minor or major step size is 0. Check that you haven't
				got an accidental SetTextTicks(0) in your code.<p>
				If this is not the case you might have stumbled upon a bug in JpGraph.
				Please report this and if possible include the data that caused the
				problem.");
	}
		
	$this->major_step=$aMajStep;
	$this->minor_step=$aMinStep;
	$this->is_set = true;
    }

    // Draw linear ticks
    function Stroke(&$img,&$scale,$pos) {
	$maj_step_abs = $scale->scale_factor*$this->major_step;		
	$min_step_abs = $scale->scale_factor*$this->minor_step;		

	if( $min_step_abs==0 || $maj_step_abs==0 ) 
	    JpGraphError::Raise("<b>JpGraph Error:</b> A plot has an illegal scale. This could for example be 
			that you are trying to use text autoscaling to draw a line plot with only one point 
			or similair abnormality (a line needs two points!).");
	$limit = $scale->scale_abs[1];	
	$nbrmajticks=floor(1.000001*(($scale->GetMaxVal()-$scale->GetMinVal())/$this->major_step))+1;
	$first=0;
		
	// If precision hasn't been specified set it to a sensible value
	if( $this->precision==-1 ) { 
	    $t = log10($this->minor_step);
	    if( $t > 0 )
		$precision = 0;
	    else
		$precision = -floor($t);
	}
	else
	    $precision = $this->precision;
			
	$img->SetLineWeight($this->weight);			
		
	// Handle ticks on X-axis
	if( $scale->type == "x" ) {
	    // Draw the major tick marks
			
	    $yu = $pos - $this->direction*$this->GetMajTickAbsSize();
			
	    // TODO: Add logic to set label_offset for text labels
	    $label = (float)$scale->GetMinVal()+$this->text_label_start+$this->label_offset;	
			
	    $start_abs=$scale->scale_factor*$this->text_label_start;
			
	    $nbrmajticks=ceil(($scale->GetMaxVal()-$scale->GetMinVal()-$this->text_label_start )/$this->major_step)+1;			
	    for( $i=0; $label<=$scale->GetMaxVal()+$this->label_offset; ++$i ) {
		$x=$scale->scale_abs[0]+$start_abs+$i*$maj_step_abs+$this->xlabel_offset*$min_step_abs;				
		$this->maj_ticklabels_pos[$i]=ceil($x);				
				
				// Apply format
		if( $this->label_formfunc != "" ) {
		    $f=$this->label_formfunc;
		    $l = $f($label);
		}	
		elseif( $this->label_formatstr != "" ) 
		    $l = sprintf($this->label_formatstr,$label);
		else
		    $l = sprintf("%01.".$precision."f",round($label,$precision));
					
		if( ($this->supress_zerolabel && ($l + 0)==0) ||
		    ($this->supress_first && $i==0) ||
		    ($this->supress_last  && $i==$nbrmajticks-1) )
		    $l="";					
		$this->maj_ticks_label[$i]=$l;
		$label+=$this->major_step;
				
				// The x-position of the tick marks can be different from the labels.
				// Note that we record the tick position (not the label) so that the grid
				// happen upon tick marks and not labels.
		$xtick=$scale->scale_abs[0]+$start_abs+$i*$maj_step_abs+$this->xtick_offset*$min_step_abs;
		$this->maj_ticks_pos[$i]=ceil($xtick);				
		if(!($this->xtick_offset > 0 && $i==$nbrmajticks-1) && !$this->supress_tickmarks) {
		    if( $this->majcolor!="" ) $img->PushColor($this->majcolor);
		    $img->Line($xtick,$pos,$xtick,$yu);
		    if( $this->majcolor!="" ) $img->PopColor();
		}
	    }
	    // Draw the minor tick marks
			
	    $yu = $pos - $this->direction*$this->GetMinTickAbsSize();
	    $label = $scale->GetMinVal();								
	    for( $i=0,$x=$scale->scale_abs[0]; $x<$limit; ++$i ) {
		$x=$scale->scale_abs[0]+$i*$min_step_abs;
		$this->ticks_pos[]=$x;
		$this->ticks_label[]=$label;
		$label+=$this->minor_step;
		if( !$this->supress_tickmarks && !$this->supress_minor_tickmarks)	{						
		    if( $this->mincolor!="" ) $img->PushColor($this->mincolor);
		    $img->Line($x,$pos,$x,$yu); 
		    if( $this->mincolor!="" ) $img->PopColor();
		}
	    }
	}
	elseif( $scale->type == "y" ) {
	    // Draw the major tick marks
	    $xr = $pos + $this->direction*$this->GetMajTickAbsSize();
	    $label = $scale->GetMinVal();
	    for( $i=0; $i<$nbrmajticks; ++$i) {
		$y=$scale->scale_abs[0]+$i*$maj_step_abs;				
				
				// THe following two lines might seem to be unecessary but they are not!
				// The reason being that for X-axis we separate the position of the labels
				// and the tick marks which we don't do for the Y-axis.
				// We therefore need to make sure both arrays are corcectly filled
				// since Axis::StrokeLabels() uses the label positions and Grid::Stroke() uses
				// the tick positions.
		$this->maj_ticklabels_pos[$i]=$y;
		$this->maj_ticks_pos[$i]=$y;
		
		if( $this->label_formfunc != "" ) {
		    $f=$this->label_formfunc;
		    $l = $f($label);
		}	
		elseif( $this->label_formatstr != "" ) 
		    $l = sprintf($this->label_formatstr,$label);
		else
		    $l = sprintf("%01.".$precision."f",round($label,$precision));
						
		if( ($this->supress_zerolabel && ($l + 0)==0) ||
		    ($this->supress_first && $i==0) ||
		    ($this->supress_last  && $i==$nbrmajticks-1) )
		    $l="";
		$this->maj_ticks_label[$i]=$l; 
		$label+=$this->major_step;	
		if( !$this->supress_tickmarks ) {
		    if( $this->majcolor!