DrawArea.affineTransform

ChartDirector Ver 3.1 (PHP Edition Edition)

Usage

affineTransform(a, b, c, d, e, f[, bgColor[, filter[, blur ]]])

Description

Perform affine transformation on the drawing surface.

An affine transformation is an operation where every pixel is copied to another pixel according to the formula.

xDest = a * xSrc + b * ySrc + c yDest = d * xSrc + e * ySrc + f

where (xSrc, ySrc) is a source pixel, and (xDest, yDest) is where it should go to.

Many graphics operation, such as translation, rotation, and resizing, can be considered as a special case of affine transformation.

Arguments

Argument	Default	Description
a	(Mandatory)	See above for description.
b	(Mandatory)	See above for description.
c	(Mandatory)	See above for description.
d	(Mandatory)	See above for description.
e	(Mandatory)	See above for description.
f	(Mandatory)	See above for description.
bgColor	FFFFFF	The background color used to fill destination pixels that are not mapped to any source pixels.
filter	LinearFilter	The filter to use for re-sampling.
blur	1	The blur factor to use for re-sampling.

Return Value

None

content"> [File: phpdemo/discontline.php".]

<?php require_once("../lib/phpchartdir.php"); #=================================================================== # For demo purpose, use random numbers as data for the chart #=================================================================== #Use a random table to create the data. The random table contains 4 cols x 31 #rows, using 9 as seed. $rantable = new RanTable(9, 4, 31); #Set the 1st col to be the series 1, 2, 3, .... $rantable->setCol(0, 1, 1, 1); #Set the 2nd, 3rd and 4th col to be random number starting from 40, 50 and 60. #The change between rows is set to -5 to 5. The minimum value of any cell is 0. $rantable->setCol(1, 40, -5, 5, 0); $rantable->setCol(2, 50, -5, 5, 0); $rantable->setCol(3, 60, -5, 5, 0); #Use the 1st col as the axis label $labels = $rantable->getCol(0); #Use the 2nd, 3rd and 4th columns for 3 lines $data0 = $rantable->getCol(1); $data1 = $rantable->getCol(2); $data2 = $rantable->getCol(3); #Simulate some data points have no data value for($i = 1; $i < 30; $i += 7) { $data0[$i] = NoValue; $data1[$i] = NoValue; $data2[$i] = NoValue; } #=================================================================== # Now we have the data ready. Actually drawing the chart. #=================================================================== #Create a XYChart object of size 600 x 220 pixels $c = new XYChart(600, 220); #Set the plot area at (100, 25) and of size 450 x 150 pixels. Enabled both #vertical and horizontal grids by setting their colors to light grey (0xc0c0c0) $plotAreaObj = $c->setPlotArea(100, 25, 450, 150); $plotAreaObj->setGridColor(0xc0c0c0, 0xc0c0c0); #Add a legend box (92, 0) (top of plot area) using horizontal layout. Use 8 pts #Arial font. Disable bounding box (set border to transparent). $legendObj = $c->addLegend(92, 0, false, "", 8); $legendObj->setBackground(Transparent); #Add a title to the y axis. Draw the title upright (font angle = 0) $titleObj = $c->yAxis->setTitle("Average\nUtilization\n(MBytes)"); $titleObj->setFontAngle(0); #Use manually scaling of y axis from 0 to 100, with ticks every 10 units $c->yAxis->setLinearScale(0, 100, 10); #Set the labels on the x axis $c->xAxis->setLabels2($labels); #Set the title on the x axis $c->xAxis->setTitle("Jun - 2001"); #Add x axis (vertical) zones to indicate Saturdays and Sundays for($i = 0; $i < 29; $i += 7) { $c->xAxis->addZone($i, $i + 2, 0xc0c0c0); } #Add a line layer to the chart $layer = $c->addLineLayer(); #Set the default line width to 2 pixels $layer->setLineWidth(2); #Add the three data sets to the line layer $layer->addDataSet($data0, 0xcf4040, "Server #1"); $layer->addDataSet($data1, 0x40cf40, "Server #2"); $layer->addDataSet($data2, 0x4040cf, "Server #3"); #Layout the chart to fix the y axis scaling. We can then use getXCoor and #getYCoor to determine the position of custom objects. $c->layout(); #Add the "week n" custom text boxes at the top of the plot area. for($i = 0; $i < 4; ++$i) { #Add the "week n" text box using 8 pt Arial font with top center alignment. $textbox = $c->addText($layer->getXCoor($i * 7 + 2), 25, "Week $i", "arialbd.ttf", 8, 0x0, TopCenter); #Set the box width to cover five days $textbox->setSize($layer->getXCoor($i * 7 + 7) - $layer->getXCoor($i * 7 + 2 ) + 1, 0); #Set box background to pale yellow 0xffff80, with a 1 pixel 3D border $textbox->setBackground(0xffff80, Transparent, 1); } #output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>

bels. In this example, the labels must be Jan - Dec. $labels = array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"); $c->xAxis->setLabels($labels); #Set the x-axis width to 2 pixels $c->xAxis->setWidth(2); #Set the y axis title $c->yAxis->setTitle("USD (K)"); #Set the y-axis width to 2 pixels $c->yAxis->setWidth(2); #Output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>
[File: phpdemo/dbdemo2b.php".]

<?php require_once("../lib/phpchartdir.php"); # #Retrieve the data from the query parameters # if (isset($HTTP_GET_VARS["year"])) $SelectedYear = $HTTP_GET_VARS["year"]; else $SelectedYear = 2001; $software = split(",", $HTTP_GET_VARS["software"]); $hardware = split(",", $HTTP_GET_VARS["hardware"]); $services = split(",", $HTTP_GET_VARS["services"]); # #Now we obtain the data into arrays, we can start to draw the chart #using ChartDirector # #Create a XYChart of size 420 pixels x 240 pixels $c = new XYChart(420, 240); #Set the chart background to pale yellow (0xffffc0) with a 2 pixel 3D border $c->setBackground(0xffffc0, 0xffffc0, 2); #Set the plotarea at (70, 50) and of size 320 x 150 pixels. Set background #color to white (0xffffff). Enable both horizontal and vertical grids by #setting their colors to light grey (0xc0c0c0) $c->setPlotArea(70, 50, 320, 150, 0xffffff, 0xffffff, 0xc0c0c0, 0xc0c0c0); #Add a title to the chart $title = $c->addTitle("Revenue for " . $SelectedYear, "timesbi.ttf"); $title->setBackground(0xffff00); #Add a legend box at the top of the plotarea $legend = $c->addLegend(70, 30, 0, "", 8); $legend->setBackground(Transparent); #Add a line chart layer using the supplied data $layer = $c->addLineLayer2(); $dataSet = $layer->addDataSet($software, -1, "Software"); $dataSet->setLineWidth(3); $dataSet = $layer->addDataSet($hardware, -1, "Hardware"); $dataSet->setLineWidth(3); $dataSet = $layer->addDataSet($services, -1, "Services"); $dataSet->setLineWidth(3); $layer->setBorderColor(Transparent, 1); #Set the x axis labels. In this example, the labels must be Jan - Dec. $labels = array("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"); $c->xAxis->setLabels($labels); #Set the x-axis width to 2 pixels $c->xAxis->setWidth(2); #Set the y axis title $c->yAxis->setTitle("USD (K)"); #Set the y-axis width to 2 pixels $c->yAxis->setWidth(2); #Output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>

ved using Box.getImageCoor. This allows <AREA> tags for TextBox objects be created easily.

(For TextBox, there is no "getHTMLImageMap" method. It is because each TextBox object only has one hot spot. It is more convenient to enter the handler URL and tool tip text directly into the <AREA> tag, rather than generating them using getHTMLImageMap.)

In this example, the image map coordinates of the chart title, vertical mark label, and the copyright message are obtained using Box.getImageCoor:

$titleCoor = $title->getImageCoor(); $markCoor = $mark->getImageCoor(); $copyRightCoor = $copyRight->getImageCoor();

The image map coordinates are then used to make <AREA> tags as follows:

<area <?php echo $titleCoor?> href='javascript:doSomething();' title='The title is clickable!'> <area <?php echo $markCoor?> href='javascript:doSomething();' title='The "Merge with Star Tech" text is clickable!'> <area <?php echo $copyRightCoor?> href='javascript:doSomething();' title='The copyright text is clickable!'>

01', '959', '1018', '1102');