Inizializzazione

jpgraph-3.5.0b1/src/Examples/mkgrad.php

@@ -0,0 +1,171 @@
+<?php // content="text/plain; charset=utf-8"
+//=======================================================================
+// File:	    MKGRAD.PHP
+// Description:	Simple tool to create a gradient background
+// Ver: 	    $Id$
+//=======================================================================
+
+// Basic library classes
+require_once ('jpgraph/jpgraph.php');
+require_once ('jpgraph/jpgraph_bar.php');
+require_once ('jpgraph/jpgraph_canvas.php');
+  
+
+// Must have a global comparison method for usort()
+function _cmp($a,$b) {
+    return strcmp($a,$b);
+}
+
+// Generate the input form
+class Form {
+    var $iColors;
+    var $iGradstyles;
+    function Form() {
+
+	$rgb = new RGB();
+	$this->iColors = array_keys($rgb->rgb_table);
+	usort($this->iColors,'_cmp');
+
+	$this->iGradstyles = array(
+	    "Vertical",2,
+	    "Horizontal",1,
+	    "Vertical from middle",3,
+	    "Horizontal from middle",4,
+	    "Horizontal wider middle",6,
+	    "Vertical wider middle",7,
+	    "Rectangle",5 );
+    }
+
+    function Run() {
+
+	echo '<h3>Generate gradient background</h3>';
+	echo '<form METHOD=POST action=""><table style="border:blue solid 1;">';
+	echo '<tr><td>Width:<br>'.$this->GenHTMLInput('w',8,4,300).'</td>';
+	echo "\n";
+	echo '<td>Height:<br>'.$this->GenHTMLInput('h',8,4,300).'</td></tr>';
+	echo "\n";
+	echo '<tr><td>From Color:<br>';
+	echo $this->GenHTMLSelect('fc',$this->iColors);
+	echo '</td><td>To Color:<br>';
+	echo $this->GenHTMLSelect('tc',$this->iColors);
+	echo '</td></tr>';
+	echo '<tr><td colspan=2>Gradient style:<br>';
+	echo $this->GenHTMLSelectCode('s',$this->iGradstyles);
+	echo '</td></tr>';
+	echo '<tr><td colspan=2>Filename: (empty to stream)<br>';
+	echo $this->GenHTMLInput('fn',55,100);
+	echo '</td></tr>';
+	echo '<tr><td colspan=2 align=right>'.$this->GenHTMLSubmit('submit').'</td></tr>';
+	echo '</table>';
+	echo '</form>';
+
+    }
+
+    function GenHTMLSubmit($name) {
+	return '<INPUT TYPE=submit name="ok"  value=" Ok " >';
+    }
+
+
+    function GenHTMLInput($name,$len,$maxlen=100,$val='') {
+	return '<INPUT TYPE=TEXT NAME='.$name.' VALUE="'.$val.'" SIZE='.$len.' MAXLENGTH='.$maxlen.'>';
+    }
+
+    function GenHTMLSelect($name,$option,$selected="",$size=0) {
+	$txt="<select name=$name";
+	if( $size > 0 )
+	    $txt .= " size=$size >";
+	else 
+	    $txt .= ">";
+	for($i=0; $i<count($option); $i++) {
+	    if( $selected==$option[$i] )
+		$txt=$txt."<option selected value=\"$option[$i]\">$option[$i]</option>\n";		
+	    else
+		$txt=$txt."<option value=\"".$option[$i]."\">$option[$i]</option>\n";
+	}
+	return $txt."</select>\n";
+    }
+    
+    function GenHTMLSelectCode($name,$option,$selected="",$size=0) {
+	$txt="<select name=$name";
+	if( $size > 0 )
+	    $txt .= " size=$size >";
+	else 
+	    $txt .= ">";
+	for($i=0; $i<count($option); $i += 2) {
+	    if( $selected==$option[($i+1)] )
+		$txt=$txt."<option selected value=".$option[($i+1)].">$option[$i]</option>\n";		
+	    else
+		$txt=$txt."<option value=\"".$option[($i+1)]."\">$option[$i]</option>\n";
+	}
+	return $txt."</select>\n";
+    }
+
+}
+
+// Basic application driver
+
+class Driver {
+    var $iGraph, $iGrad;
+    var $iWidth,$iHeight;
+    var $iFromColor, $iToColor;
+    var $iStyle;
+    var $iForm;
+
+    function Driver() {
+	$this->iForm = new Form();
+    }
+
+    function GenGradImage() {
+	
+	$aWidth	 = (int)@$_POST['w'];
+	$aHeight = (int)@$_POST['h'];
+	$aFrom   = @$_POST['fc'];
+	$aTo     = @$_POST['tc'];
+	$aStyle  = @$_POST['s'];
+	$aFileName  = @$_POST['fn'];
+
+	$this->iWidth     = $aWidth;
+	$this->iHeight    = $aHeight;
+	$this->iFromColor = $aFrom;
+	$this->iToColor   = $aTo;
+	$this->iStyle     = $aStyle;
+
+	$this->graph = new CanvasGraph($aWidth,$aHeight);
+	$this->grad  = new Gradient($this->graph->img);
+	$this->grad->FilledRectangle(0,0,
+				     $this->iWidth,$this->iHeight,
+				     $this->iFromColor,
+				     $this->iToColor,
+				     $this->iStyle);
+
+	if( $aFileName != "" ) {
+	    $this->graph->Stroke($aFileName);
+	    echo "Image file '$aFileName' created.";
+	}
+	else
+	    $this->graph->Stroke();
+    }
+
+
+    function Run() {
+	
+	global $HTTP_POST_VARS;
+
+	// Two modes:
+	// 1) If the script is called with no posted arguments
+	// we show the input form.
+	// 2) If we have posted arguments we naivly assume that
+	// we are called to do the image.
+
+	if( @$_POST['ok']===' Ok ' ) { 
+	    $this->GenGradImage();
+	}
+	else
+	    $this->iForm->Run();
+    }
+}
+
+$driver = new Driver();				
+$driver->Run();
+
+?>