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Issue #2773 - added code to help prevent eclipse bug from occurring.

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Former-commit-id: ce08022db7 [formerly 7b3700b5ad07c677755844f969b5c31f31be138b]
Former-commit-id: 7099472204
This commit is contained in:
Lee Venable 2014-02-12 13:47:20 -06:00
parent 8ba331e7fb
commit 8073fd22b1
1 changed files with 49 additions and 5 deletions
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54
cave/com.raytheon.viz.texteditor/src/com/raytheon/viz/texteditor/print/PrintDisplay.java
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@ -31,6 +31,7 @@ import org.eclipse.swt.printing.PrinterData;
import com.raytheon.uf.common.status.IUFStatusHandler;
import com.raytheon.uf.common.status.UFStatus.Priority;
import com.raytheon.uf.viz.core.VizApp;
/**
* Common class for handling printing of text.
@ -45,13 +46,14 @@ import com.raytheon.uf.common.status.UFStatus.Priority;
* 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.
* Feb 12, 2014 #2773 lvenable Added code to provide a workaround to an Eclipse/SWT bug
* that occurs when disposing of the printer.
*
* </pre>
*
* @author rferrel
* @version 1.0
*/
public class PrintDisplay {
public static void print(final String printedText, final FontData fontData,
IUFStatusHandler statusHandler) {
@ -108,19 +110,46 @@ public class PrintDisplay {
int end;
/**
* Constructor
*
* @param printer
* Printer object.
* @param text
* Text to print.
* @param fontData
* Font information.
*/
private PrintDisplay(Printer printer, String text, FontData fontData) {
this.printer = printer;
this.textToPrint = text;
this.printerFontData = fontData;
}
/**
* Print thread that will print the information to the printer.
*/
private void printJob() {
Thread thread = new Thread("Printing") {
public void run() {
printIt();
/** Dispose of the resources. */
printer.dispose();
/*
* Dispose of the printer resource. Running the dispose on the
* UI Thread should prevent the Eclipse/SWT bug from occurring.
*
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=259371
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=276438
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=265028
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=265265
*/
VizApp.runAsync(new Runnable() {
@Override
public void run() {
printer.dispose();
}
});
if (tmpFont != null && tmpFont.isDisposed() == false) {
tmpFont.dispose();
@ -130,9 +159,12 @@ public class PrintDisplay {
thread.start();
}
protected void setFont() {
/**
* Set the font using the fontData.
*/
private void setFont() {
/*
* get the max number of characters in a line of text and add a length
* Get the max number of characters in a line of text and add a length
* of tab
*/
String[] textLines = textToPrint.split("[\n]");
@ -197,6 +229,9 @@ public class PrintDisplay {
gc.setFont(tmpFont);
}
/**
* Print to the printer.
*/
private void printIt() {
if (printer.startJob("Text")) { // the string is the job name - shows up
// in the printer's job list
@ -245,6 +280,9 @@ public class PrintDisplay {
}
}
/**
* Print the text.
*/
private void printText() {
printer.startPage();
wordBuffer = new StringBuilder();
@ -281,6 +319,9 @@ public class PrintDisplay {
}
}
/**
* Print the work buffer.
*/
private void printWordBuffer() {
if (wordBuffer.length() > 0) {
String word = wordBuffer.toString();
@ -295,6 +336,9 @@ public class PrintDisplay {
}
}
/**
* Start a new line for printing.
*/
private void newline() {
x = leftMargin;
y += lineHeight;