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Issue #2420 - fixed font memory leak in the setFont method

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Change-Id: Ibf773c6df580cb65dd62b46f8fd127fde6585a57

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This commit is contained in:
Lee Venable 2013-09-30 13:14:06 -05:00
parent 9be6409ebb
commit 40dcc74e4b
1 changed files with 72 additions and 55 deletions
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127
cave/com.raytheon.viz.texteditor/src/com/raytheon/viz/texteditor/print/PrintDisplay.java
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@ -42,8 +42,9 @@ import com.raytheon.uf.common.status.UFStatus.Priority;
* ------------ ---------- ----------- --------------------------
* Sep 15, 2011 10557 rferrel Initial creation
* Jul 17, 2012 14274 rferrel Now use eclipse Printer instead of awt.
* Text is printed using same font as the GUI
* Text is printed using same font as the GUI
* Dec 31, 2012 15651 M Gamazaychikov Added setFont method to scale font for printing
* Sep 30, 2013 #2420 lvenable Fixed memory leak in the setFont method.
*
* </pre>
*
@ -54,6 +55,12 @@ import com.raytheon.uf.common.status.UFStatus.Priority;
public class PrintDisplay {
public static void print(final String printedText, final FontData fontData,
IUFStatusHandler statusHandler) {
if (printedText == null || printedText.trim().length() == 0) {
// Do not waste paper when nothing to print.
return;
}
PrinterData data = Printer.getDefaultPrinterData();
if (data == null) {
statusHandler.handle(Priority.PROBLEM,
@ -61,11 +68,6 @@ public class PrintDisplay {
return;
}
if (printedText == null || printedText.trim().length() == 0) {
// Do not waste paper when nothing to print.
return;
}
final Printer printer = new Printer(data);
PrintDisplay pd = new PrintDisplay(printer, printedText, fontData);
pd.printJob();
@ -93,7 +95,10 @@ public class PrintDisplay {
private int lineHeight;
StringBuilder wordBuffer;
private StringBuilder wordBuffer;
/** Temp font. */
private Font tmpFont = null;
int x;
@ -113,78 +118,90 @@ public class PrintDisplay {
Thread thread = new Thread("Printing") {
public void run() {
printIt();
/** Dispose of the resources. */
printer.dispose();
if (tmpFont != null && tmpFont.isDisposed() == false) {
tmpFont.dispose();
}
}
};
thread.start();
}
protected void setFont() {
/*
* get the max number of characters in a line of text
* and add a length of tab
*/
String [] textLines = textToPrint.split("[\n]");
int maxChar = textLines[0].length();
for ( int counter=1; counter<textLines.length; counter++){
if (textLines[counter].length() > maxChar){
maxChar = textLines[counter].length();
}
}
maxChar = maxChar + 4;
/*
* get the original font size and set the gc font.
*/
float origFontSize = printerFontData.getHeight();
/*
* get the max number of characters in a line of text and add a length
* of tab
*/
String[] textLines = textToPrint.split("[\n]");
int maxChar = textLines[0].length();
for (int counter = 1; counter < textLines.length; counter++) {
if (textLines[counter].length() > maxChar) {
maxChar = textLines[counter].length();
}
}
maxChar = maxChar + 4;
/*
* get the original font size and set the gc font.
*/
float origFontSize = printerFontData.getHeight();
Font printerFont = new Font(printer, printerFontData);
gc.setFont(printerFont);
/*
* Create a buffer for computing line width in pixels.
*/
StringBuilder aBuffer = new StringBuilder(maxChar);
for (int i = 0; i < maxChar; i++) {
aBuffer.append(' ');
aBuffer.append(' ');
}
/*
* Get the line width in pixels and the device's width in pixels
*/
int lineWidthPixels = gc.stringExtent(aBuffer.toString()).x;
int deviceWidthPixels = rightMargin - leftMargin;
int deviceWidthPixels = rightMargin - leftMargin;
/*
* Scale the original font size;
*/
float fontSize = (float)deviceWidthPixels / (float)lineWidthPixels * (float)origFontSize;
/*
* Validate that the line width in scaled font does not exceed the deviceWidthPixelx
* Scale the original font size;
*/
boolean isValidated = false;
while (!isValidated) {
printerFontData.setHeight((int) (fontSize));
gc.setFont(new Font(printer, printerFontData));
lineWidthPixels = gc.stringExtent(aBuffer.toString()).x;
if (lineWidthPixels < deviceWidthPixels) {
isValidated = true;
} else {
fontSize--;
}
}
printerFont.dispose();
/*
* Set the printerFont Data font to the scaled font
*/
printerFontData.setHeight((int)(fontSize));
gc.setFont(new Font(printer, printerFontData));
}
float fontSize = (float) deviceWidthPixels / (float) lineWidthPixels
* (float) origFontSize;
private void printIt() {
/*
* Validate that the line width in scaled font does not exceed the
* deviceWidthPixelx
*/
boolean isValidated = false;
if (tmpFont != null && tmpFont.isDisposed() == false) {
tmpFont.dispose();
}
while (!isValidated) {
printerFontData.setHeight((int) (fontSize));
tmpFont = new Font(printer, printerFontData);
gc.setFont(tmpFont);
lineWidthPixels = gc.stringExtent(aBuffer.toString()).x;
if (lineWidthPixels < deviceWidthPixels) {
isValidated = true;
} else {
fontSize--;
tmpFont.dispose();
}
}
printerFont.dispose();
gc.setFont(tmpFont);
}
private void printIt() {
if (printer.startJob("Text")) { // the string is the job name - shows up
// in the printer's job list
Rectangle clientArea = printer.getClientArea();
Rectangle trim = printer.computeTrim(0, 0, 0, 0);
Rectangle trim = printer.computeTrim(0, 0, 0, 0);
Point dpi = printer.getDPI();
// one inch from left side of paper
@ -207,7 +224,7 @@ public class PrintDisplay {
* foreground color.
*/
gc = new GC(printer);
setFont();
setFont();
Color printerForegroundColor = new Color(printer, new RGB(0, 0, 0));
Color printerBackgroundColor = new Color(printer, new RGB(255, 255,
255));
@ -221,7 +238,7 @@ public class PrintDisplay {
printer.endJob();
// Cleanup graphics resources used in printing
printerForegroundColor.dispose();
printerBackgroundColor.dispose();
gc.dispose();