Hi..

I deleted all my code and tried again but still its not happening.. i have no clue what can be the reason for non-creation of a line on the canvas... I am putting on the code.. Please help me to sort out the error...

canvasmouse.h
Qt Code: 
  1. #ifndef CANVASMOUSE_H
  2. #define CANVASMOUSE_H
  3.  
  4. #include "ui_zoomsample.h"
  5. #include <Q3CanvasView>
  6. #include <Q3Canvas>
  7. #include <Qt>
  8. #include <QtGui>
  9. #include <Q3CanvasLine>
  10.  
  11. class CanvasMouse: public Q3CanvasView
  12. {     
  13.       Q_OBJECT
  14.  
  15.       public:
  16.              CanvasMouse(Q3Canvas *pCanvas,QFrame *frame);
  17.              ~CanvasMouse();
  18.  
  19.       private:
  20.  
  21.               void drawLine();
  22.               Q3Canvas *m_pCanvas;
  23.               Q3CanvasLine *m_pCanvasLine;
  24. };   
  25.  
  26. #endif
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canvasmouse.cpp
Qt Code: 
  1. #include "canvasmouse.h"
  2. CanvasMouse::CanvasMouse(Q3Canvas *pCanvas, QFrame *frame): Q3CanvasView(frame)
  3. {
  4.     m_pCanvas = pCanvas;
  5.     Q3CanvasView::setCanvas(m_pCanvas);
  6.     m_pCanvas->setBackgroundColor(Qt::white);
  7.     Q3CanvasView::resize(400, 400);
  8.     drawLine();
  9. }
  10. CanvasMouse::~CanvasMouse()
  11. {
  12. }
  13. void CanvasMouse::drawLine()
  14. {
  15.      m_pCanvasLine = new Q3CanvasLine(m_pCanvas);
  16.      m_pCanvasLine->setPoints(10,10,100,10);
  17.      m_pCanvasLine->show();   
  18.      resizeContents(400,400);
  19. }
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main.cpp
Qt Code: 
  1. #include <QApplication>
  2. #include "imagezoomer.h"
  3. #include "ui_zoomsample.h"
  4.  
  5. int main(int argc, char **argv)
  6. {
  7.     QApplication app(argc,argv);
  8.     QMainWindow *form = new QMainWindow;
  9.  
  10.     Ui::MainWindow *ui;
  11.     ui = new Ui::MainWindow();
  12.     ui->setupUi(form);
  13.     Q3Canvas *pCanvas = new Q3Canvas;
  14.     ImageZoomer imgzoom(ui,pCanvas);
  15.     form->show();
  16.     return app.exec();
  17. }
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imagezoomer.h
Qt Code: 
  1. #include "imagezoomer.h"
  2. #include <QtGui>
  3. #include <qdir.h>
  4. #include <QColor>
  5.  
  6. ImageZoomer::ImageZoomer(Ui::MainWindow *_mwin, Q3Canvas *pCanvas): mwin(_mwin),m_pCanvas(pCanvas)
  7. {                         
  8.      frame = new QFrame(mwin->centralwidget);
  9.      frame->setGeometry(QRect(60, 70, 591, 571));
  10.      frame->setFrameShape(QFrame::StyledPanel);
  11.      frame->setFrameShadow(QFrame::Plain);
  12.  
  13.      canmouse = new CanvasMouse(m_pCanvas,frame);
  14. }
  15. ImageZoomer::~ImageZoomer()
  16. {
  17. }
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There is no compilation error.. It has to be somewhere logical... and i am not able to catch it.. Please help me in finding it out..

Thanking you...

Kapil