还要问一个问题,为什么我在这个类里实现的keyPressEvent,ImageorDir ,set buttonpixmap,都没作用,实际调用的是ScanList 里的虚函数???
源码:
#include "/root/subclass/scanlist.h"
#include <qscrollview.h>
#include <qapplication.h>
class PictureList: public ScanList
{
// Q_OBJECT ///就是这句话加了就出错
public :
PictureList(QWidget* parent=0, const char* name=0, WFlags f=Qt::WStyle_Customize | Qt::WStyle_NoBorder )
:ScanList( parent, name, f )
{
// create the picture view
pictureView = new QScrollView( this );
pictureView->setGeometry(0, 0, 320, 240);
pictureView->viewport()->setBackgroundColor( blue );
viewLabel = new QLabel( pictureView->viewport() );
pictureView->addChild(viewLabel);
pictureView->hide();
image_flag = 0; // single view flag is initialise to zero
size = 0;
}
virtual void setButtonPixmap( MPushButton1 *b1, unsigned int index );
virtual bool isImageOrDic( QString tmpName );
protected :
virtual void keyPressEvent( QKeyEvent *e );
private :
void singleView();
void GetZoom_orign();
void GetZoom_standard();
void zoomIn();
void zoomOut();
void FitSize();
void SetPosition();
QScrollView *pictureView;
QLabel *viewLabel;
QPixmap map;
QPixmap pixmap;
QImage image;
bool image_flag;
int size;
unsigned int orign_w;
unsigned int orign_h;
unsigned int zoom_w;
unsigned int zoom_h;
unsigned int stard_w;
unsigned int stard_h;
bool fat_flag;
};
void PictureList::keyPressEvent( QKeyEvent *e )
{
if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Down )
{
if( image_flag )
{
pictureView->scrollBy(0,15);
}
else
DownPressEvent( );
}
else if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Up )
{
if( image_flag )
{
pictureView->scrollBy(0,-15);
}
else
UpPressEvent( );
}
else if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Left )
{
if(image_flag)
pictureView->scrollBy(-15,0);
else
LeftPressEvent();
}
else if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Right )
{
if(image_flag)
pictureView->scrollBy(15,0);
else
RightPressEvent();
}
else if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Return )
{
// printf("go to return\n");
if(image_flag)
{
pictureView->hide();
image_flag = 0;
}
else
{
if( pHandle[handleX][handleY]->isDir )
{
ScanDir();
}
else
singleView();
}
}
else if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Minus )
{
if( image_flag )
{
printf("zoomin key press\n");
zoomIn();
}
else
{
/* if(current_page > 0 )
GetPixmap( --current_page );
else
GetPixmap( current_page = page_count-1 );
for( unsigned int i=0;i<image_count;i++ )
free(namelist);
free(namelist);
*/ qApp->quit();
}
}
else if( ( ( QKeyEvent * )e )->key( ) == Qt::Key_Equal )
{
if( image_flag )
zoomOut();
else
{
if(current_page < page_count-1 )
GetPixmap( ++current_page );
else
GetPixmap( current_page = 0 );
}
}
else
{
e->ignore();
}
}
bool PictureList::isImageOrDic( QString tmpName ) //check the filename is dir or image file?
{
printf( "hahaahalololo\n" );
struct stat tmpstat;
char tmpchar[200];
strcpy(tmpchar,scan_dir );
// printf("tmpChar is ....%s\n",tmpchar);
strcat(tmpchar,"/");
strcat(tmpchar,tmpName);
printf("tmpChar is..........%s\n",tmpchar);
lstat(tmpchar,&tmpstat);
if(S_ISDIR( tmpstat.st_mode )) //check if or not dir
{
printf("is dir:%s\n",tmpchar);
if(!strcmp(tmpName,".")||!strcmp(tmpName,"..")) //omit the . and .. dir
return 0;
else
return 1;
}
tmpName = tmpName.right(5);
if( tmpName.contains(".jpg")||tmpName.contains(".jpeg") //check if or not image file
||tmpName.contains(".png")||tmpName.contains(".gif")
||tmpName.contains(".bmp")||tmpName.contains(".xpm"))
return 1;
else
return 0;
}
void PictureList::singleView( )
{
current_image = current_page *6+handleY*3+handleX;
strcpy( nameString, scan_dir );
sprintf(nameString, "%s/%s",nameString, fileNameList.at(current_image));
printf( "current image name is -------------%s\n",nameString );
image.load(nameString);
FitSize();
image_flag = 1;
size = 0; // reset the size to zero in new picture
}
void PictureList::FitSize( )// adjust the size and position in scrollview
{
pictureView->moveChild( viewLabel,0,0 );
pictureView->setContentsPos( 0,0 );
orign_w = image.width();
orign_h = image.height();
size=1;
double w_scale=orign_w/315.0;
double h_scale=orign_h/237.0;
double scale = w_scale>h_scale?w_scale:h_scale;
if(scale>1)
fat_flag=1;
else
fat_flag=0;
stard_w = (unsigned int)(orign_w/scale);
stard_h = (unsigned int)(orign_h/scale);
// viewLabel->setPixmap( pixmap );
zoomIn();
pictureView->show(); //after set the position ,show the picture
}
void PictureList::zoomIn()// shear the image
{
if (size<=-5)
return;
size--;
printf("zoomin move child\n");
pictureView->setContentsPos( 0,0 );
// pictureView->moveChild(viewLabel,0,0); // recover the position to lefttop
strcpy(nameString, scan_dir);
sprintf(nameString, "%s/%s",nameString, fileNameList.at(current_image));
printf("nameString is .......%s\n", nameString);
image.load(nameString);
printf("zoomin smoothscale image\n");
if( fat_flag )
GetZoom_standard();
else
GetZoom_orign();
printf("zoom_w:%d zoom_h:%d\n",zoom_w,zoom_h);
image = image.smoothScale( zoom_w, zoom_h );
// printf("zoomin convert image\n");
pixmap.convertFromImage(image);
// printf("zoomin set pixmap\n");
viewLabel->setPixmap(pixmap);
SetPosition();
}
void PictureList::zoomOut() // enlarge the image
{
if( size>=5 )
return;
size++;
// pictureView->moveChild(viewLabel,0,0); // recover the position to lefttop
pictureView->setContentsPos( 0,0 );
strcpy(nameString, scan_dir);
sprintf(nameString, "%s/%s",nameString, fileNameList.at(current_image));
image.load(nameString);
if( fat_flag ) // zoom by the 320*240
GetZoom_standard();
else
GetZoom_orign(); // zoom by the orgin size
image = image.smoothScale( zoom_w, zoom_h );
pixmap.convertFromImage(image);
viewLabel->setPixmap(pixmap);
SetPosition();
}
void PictureList::GetZoom_orign()
{
switch(size)
{
case 0:
zoom_w = orign_w;
zoom_h = orign_h;
break;
case 1:
zoom_w = orign_w*4/3;
zoom_h = orign_h*4/3;
break;
case 2:
zoom_w = orign_w*16/9;
zoom_h = orign_h*16/9;
break;
case 3:
zoom_w = orign_w*64/27;
zoom_h = orign_h*64/27;
break;
case 4:
zoom_w = orign_w*256/81;
zoom_h = orign_h*256/81;
break;
case 5:
zoom_w = orign_w*1024/243;
zoom_h = orign_h*1024/243;
break;
case -1:
zoom_w = orign_w*3/4;
zoom_h = orign_h*3/4;
break;
case -2:
zoom_w = orign_w*9/16;
zoom_h = orign_h*9/16;
break;
case -3:
zoom_w = orign_w*27/64;
zoom_h = orign_h*27/64;
break;
case -4:
zoom_w = orign_w*81/256;
zoom_h = orign_h*81/256;
break;
case -5:
zoom_w = orign_w*243/1024;
zoom_h = orign_h*243/1024;
break;
default:
printf("size error\n");
}
}
void PictureList::GetZoom_standard()
{
switch(size)
{
case 0:
zoom_w = stard_w;
zoom_h = stard_h;
break;
case 1:
zoom_w = stard_w*4/3;
zoom_h = stard_h*4/3;
break;
case 2:
zoom_w = stard_w*16/9;
zoom_h = stard_h*16/9;
break;
case 3:
zoom_w = stard_w*64/27;
zoom_h = stard_h*64/27;
break;
case 4:
zoom_w = stard_w*256/81;
zoom_h = stard_h*256/81;
break;
case 5:
zoom_w = stard_w*1024/243;
zoom_h = stard_h*1024/243;
break;
case -1:
zoom_w = stard_w*3/4;
zoom_h = stard_h*3/4;
break;
case -2:
zoom_w = stard_w*9/16;
zoom_h = stard_h*9/16;
break;
case -3:
zoom_w = stard_w*27/64;
zoom_h = stard_h*27/64;
break;
case -4:
zoom_w = stard_w*81/256;
zoom_h = stard_h*81/256;
break;
case -5:
zoom_w = stard_w*243/1024;
zoom_h = stard_h*243/1024;
break;
default:
printf("size error\n");
}
}
void PictureList::SetPosition()
{
int w = image.width();
int h = image.height();
int offsetx,offsety;
printf("set Position\n");
if( w<320||h<240 ) //move to viewport center
{
if(w<320)
{
offsetx = (315-w)/2;
offsetx=offsetx>0?offsetx:0;
}
else
offsetx = 0;
if(h<240)
{
offsety = (237-h)/2;
offsety=offsety>0?offsety:0;
}
else
offsety = 0;
printf("set Position execute\n");
printf(" offsetx:%d offsety:%d\n",offsetx,offsety);
pictureView->moveChild( viewLabel,offsetx,offsety );
pictureView->setContentsPos( offsetx,offsety );
}
else
{
pictureView->moveChild( viewLabel,0,0 );
pictureView->setContentsPos( 0,0 );
}
printf("set Position ok\n");
}
void PictureList::setButtonPixmap( MPushButton1 *b1, unsigned int index ) //set the index pixmap for b1 button
{
strcpy(nameString,scan_dir);
sprintf(nameString, "%s/%s",nameString, fileNameList.at(index));
printf("the %d index image name is.. %s\n", index, nameString );
struct stat tmpstat;
lstat(nameString,&tmpstat);
if(S_ISDIR( tmpstat.st_mode )) // if or not the dictory
{
image.load("/usr/pictures/other/dir.png");
b1->isDir = TRUE;
printf("is dir:%s\n",nameString);
}
else
{
image.load( nameString );
b1->isDir = FALSE;
image = image.smoothScale(90,84); //resize the image fit the button
}
map.convertFromImage(image);
b1->setPixmap(map, fileNameList.at(index));
}
int main(int argc, char** argv)
{
QApplication app(argc,argv);
app.setFont(QFont("Simsun",16) );
PictureList pic;
pic.resize( 320, 240);
app.setMainWidget(&pic);
pic.show();
return app.exec();
}
