Qt编程实例。qt program examples

#include <qapplication.h> #include "mousekeyevent.h" MouseKeyEvent::MouseKeyEvent(QWidget *parent,const char *name):QWidget(parent,name) { setCaption("OURS_qt_Example"); setBackgroundColor(white); label=new QLabel("Wellcome!",this); label->setBackgroundColor(white); QFont f("Helvetica",16,QFont::Bold); label->setFont(f); label->setGeometry(25,70,250,100); label->setAlignment(AlignVCenter|AlignHCenter); } void MouseKeyEvent::mousePressEvent(QMouseEvent *e) { switch(e->button()) { case LeftButton: label->clear(); label->setText("Mouse:LeftButton Pressed!"); break; case RightButton: label->clear(); label->setText("Mouse:RightButton Pressed!"); break; case MidButton: label->clear(); label->setText("Mouse:MidButton Pressed!"); break; default: label->clear(); label->setText("Mouse:Undefined Pressed!"); break; } } void MouseKeyEvent::moseMoveEvent(QMouseEvent *e) { QString str=QString("X:"); QString ps=""; ps=ps.setNum(e->x()); str+=ps; str+=" Y:"; ps=""; ps=ps.setNum(e->y()); str+=ps; label->clear(); label->setText(str); } void MouseKeyEvent::keyPressEvent(QKeyEvent *e) { switch(e->key()) { case Key_Escape: label->clear(); label->setText("Key:Esc Pressed!"); break; case Key_Tab: label->clear(); label->setText("Key:Tab Pressed!"); break; case Key_Backtab: label->clear(); label->setText("Key:BackTab Pressed!"); break; case Key_BackSpace: label->clear(); label->setText("Key:BackSpace Pressed!"); break; case Key_Return: label->clear(); label->setText("Key:Return Pressed!"); break; case Key_Enter: label->clear(); label->setText("Key:Enter Pressed!"); break; case Key_Insert: label->clear(); label->setText("Key:Insert Pressed!"); break; case Key_Delete: label->clear(); label->setText("Key:Delete Pressed!"); break; case Key_Pause: label->clear(); label->setText("Key:Pause Pressed!"); break; case Key_Print: label->clear(); label->setText("Key:Print Pressed!"); break; case Key_SysReq: label->clear(); label->setText("Key:SysReq Pressed!"); break; case Key_Home: label->clear(); label->setText("Key:Home Pressed!"); break; case Key_End: label->clear(); label->setText("Key:End Pressed!"); break; case Key_Left: label->clear(); label->setText("Key:Left Pressed!"); break; case Key_Up: label->clear(); label->setText("Key:Up Pressed!"); break; case Key_Right: label->clear(); label->setText("Key:Right pressed!"); break; case Key_Down: label->clear(); label->setText("Key:Down Pressed!"); break; case Key_PageUp: label->clear(); label->setText("Key:PageUp Pressed!"); break; case Key_PageDown: label->clear(); label->setText("Key:PageDown Pressed!"); break; case Key_Shift: label->clear(); label->setText("Key:Shift Pressed!"); break; case Key_Control: label->clear(); label->setText("Key:Control Pressed!"); break; case Key_Meta: label->clear(); label->setText("Key:Meta Pressed!"); break; case Key_Alt: label->clear(); label->setText("Key:Alt Pressed!"); break; case Key_CapsLock: label->clear(); label->setText("Key:CapsLock Pressed!"); break; case Key_NumLock: label->clear(); label->setText("Key:NumLock Pressed!"); break; case Key_ScrollLock: label->clear(); label->setText("Key:ScrollLock Pressed!"); break; case Key_F1: label->clear(); label->setText("Key:F1 Pressed!"); break; case Key_F2: label->clear(); label->setText("Key:F2 Pressed!"); break; case Key_F3: label->clear(); label->setText("Key:F3 Pressed!"); break; case Key_F4: label->clear(); label->setText("Key:F4 Pressed!"); break; case Key_F5: label->clear(); label->setText("Key:F5 Pressed!"); break; case Key_F6: label->clear(); label->setText("Key:F6 Pressed!"); break; case Key_F7: label->clear(); label->setText("Key:F7 Pressed!"); break; case Key_F8: label->clear(); label->setText("Key:F8 Pressed!"); break; case Key_F9: label->clear(); label->setText("Key:F9 Pressed!"); break; case Key_A: label->clear(); label->setText("Key:A Pressed!"); break; case Key_B: label->clear(); label->setText("Key:B Pressed!"); break; case Key_C: label->clear(); label->setText("Key:C Pressed!"); break; case Key_D: label->clear(); label->setText("Key:D Pressed!"); break; case Key_E: label->clear(); label->setText("Key:E Pressed!"); break; case Key_F: label->clear(); label->setText("Key:F Pressed!"); break; case Key_G: label->clear(); label->setText("Key:G Pressed!"); break; case Key_H: label->clear(); label->setText("Key:H Pressed!"); break; case Key_I: label->clear(); label->setText("Key:I Pressed!"); break; case Key_J: label->clear(); label->setText("Key:J Pressed!"); break; case Key_K: label->clear(); label->setText("Key:K Pressed!"); break; case Key_L: label->clear(); label->setText("Key:L Pressed!"); break; case Key_M: label->clear();