关于QT图片处理(九宫格图片缩放问题)

- 日理万妓 2022-07-15 10:12 228阅读 0赞

/\*  
\*\* 功能 : 9格图处理  
\*\* picName : 图片名字  
\*\* titleHeight : 标题栏高度(单位:像素)  
\*\* BorderLineWidth : 边框宽度(单位:像素)  
\*\* parent : 带画背景的窗口句柄  
\*\* 返回值 :处理完成的图片  
\*/  
QPixmap\* NinePatch(QString& picName,int titleHeight,int BorderLineWidth ,QWidget\* Wnd)  
\{  
QPixmap\* pix = new QPixmap(picName);  
  
int pixWidth = pix->width();  
int pixHeight = pix->height();  
  
QSize WndSize = Wnd->size();  
int DstWidth = WndSize.width();  
int DstHeight = WndSize.height();  
  
QPixmap pix\_1 = pix->copy(0,0,BorderLineWidth,titleHeight);  
QPixmap pix\_2 = pix->copy(BorderLineWidth,0,pixWidth-BorderLineWidth\*2,titleHeight);  
QPixmap pix\_3 = pix->copy(pixWidth-BorderLineWidth,0,BorderLineWidth,titleHeight);  
  
QPixmap pix\_4 = pix->copy(0,titleHeight,BorderLineWidth,pixHeight-titleHeight-BorderLineWidth);  
QPixmap pix\_5 = pix->copy(BorderLineWidth,titleHeight,pixWidth-BorderLineWidth\*2,pixHeight-titleHeight-BorderLineWidth);  
QPixmap pix\_6 = pix->copy(pixWidth-BorderLineWidth,titleHeight,BorderLineWidth,pixHeight-titleHeight-BorderLineWidth);  
  
QPixmap pix\_7 = pix->copy(0,pixHeight-BorderLineWidth,BorderLineWidth,BorderLineWidth);  
QPixmap pix\_8 = pix->copy(BorderLineWidth,pixHeight-BorderLineWidth,pixWidth-BorderLineWidth\*2,BorderLineWidth);  
QPixmap pix\_9 = pix->copy(pixWidth-BorderLineWidth,pixHeight-BorderLineWidth,BorderLineWidth,BorderLineWidth);  
  
pix\_2 = pix\_2.scaled(DstWidth-BorderLineWidth\*2,titleHeight,Qt::IgnoreAspectRatio);//保持高度拉宽  
pix\_4 = pix\_4.scaled(BorderLineWidth,DstHeight-titleHeight-BorderLineWidth,Qt::IgnoreAspectRatio);//保持宽度拉高  
pix\_5 = pix\_5.scaled(DstWidth-3,DstHeight-titleHeight-BorderLineWidth);  
pix\_6 = pix\_6.scaled(BorderLineWidth,DstHeight-titleHeight-BorderLineWidth,Qt::IgnoreAspectRatio);//保持宽度拉高  
pix\_8 = pix\_8.scaled(DstWidth-BorderLineWidth\*2,BorderLineWidth);//保持高度拉宽  
  
  
QPixmap\* resultImg =new QPixmap(WndSize);  
QPainter\* painter = new QPainter(resultImg);  
if (!resultImg->isNull())  
\{  
painter->drawPixmap(0,0,pix\_1);  
painter->drawPixmap(3,0,pix\_2);  
painter->drawPixmap(DstWidth-3,0,pix\_3);  
painter->drawPixmap(0,titleHeight,pix\_4);  
painter->drawPixmap(3,titleHeight,pix\_5);  
painter->drawPixmap(DstWidth-3,titleHeight,pix\_6);  
painter->drawPixmap(0,DstHeight-3,pix\_7);  
painter->drawPixmap(3,DstHeight-3,pix\_8);  
painter->drawPixmap(DstWidth-3,DstHeight-3,pix\_9);  
painter->end();  
\}  
return resultImg;

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