我試圖打印一個帶有一些畫圖形的JPanel(覆蓋paintComponent)。圖形非常大,不適合放在單個頁面上,因此我讓它跨越多個頁面。使用java打印時,如何獲得紙張的邊距?
PrintRequestAttributeSet aset = new HashPrintRequestAttributeSet();
PageFormat pf = printJob.pageDialog(aset);
printJob.setPrintable(canvas, pf);
當我在我的JPanel類我不能寫我的print()方法(實現打印):我的問題通過調用在於這樣的事實,如果我讓用戶選擇的PageFormat /紙張類型中似乎獲得了利潤率?我使用graphics.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
使它開始繪製在正確的全角(0; 0),它考慮了邊距(即從(80; 100)左右開始)。但是,它會在底部和右側邊距上打印,因爲這會否定用戶的願望,所以我不想這樣做。
這裏是(使用默認代替)在我的print()方法作爲參考,當你沒有讓用戶設置紙張的正常工作的代碼:
Rectangle[] pageBreaks;
public int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {
//Calculate how many pages our print will be
if(pageBreaks == null){
double pageWidth = pageFormat.getPaper().getWidth();
double pageHeight = pageFormat.getPaper().getHeight();
//Find out how many pages we need
int numberOfPagesHigh = (int) Math.ceil(size.getHeight()/pageHeight);
int numberOfPagesWide = (int) Math.ceil(size.getWidth()/pageWidth);
pageBreaks = new Rectangle[numberOfPagesHigh*numberOfPagesWide];
double x = 0;
double y = 0;
int curXPage = 0;
//Calculate what we will print on each page
for (int i = 0; i < pageBreaks.length; i++){
double xStart = x;
double yStart = y;
x += pageWidth;
pageBreaks[i] = new Rectangle((int)xStart, (int)yStart, (int)pageWidth, (int)pageHeight);
curXPage++;
if (curXPage > numberOfPagesWide){
curXPage = 0;
x = 0;
y += pageHeight;
}
}
}
if (pageIndex < pageBreaks.length){
//Cast graphics to Graphics2D for richer API
Graphics2D g2d = (Graphics2D) graphics;
//Translate into position of the paper
g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());
//Setup our current page
Rectangle rect = pageBreaks[pageIndex];
g2d.translate(-rect.x, -rect.y);
g2d.setClip(rect.x, rect.y, rect.width, rect.height);
//Paint the component on the graphics object
Color oldBG = this.getBackground();
this.setBackground(Color.white);
util.PrintUtilities.disableDoubleBuffering(this);
this.paintComponent(g2d);
util.PrintUtilities.enableDoubleBuffering(this);
this.setBackground(oldBG);
//Return
return PAGE_EXISTS;
}
else {
return NO_SUCH_PAGE;
}
}