"QT5 Development and examples" 14. Implement a simple text editor 3

Implementation of the image rotation function of the text editor basic interface implementation: http://blog.csdn.net/cutter_point/article/details/42839071
First, add the slot function on the original basis:

  void ShowRotate90 ();    Rotates 90 degrees  void ShowRotate180 ();   180 degrees  void ShowRotate270 ();   270 degrees

Function Connection:

  Implementation of the image selection action  //rotation 90 °  rotate90action = new Qaction (Qicon (":/rotate90.png"), tr ("Get Rotate90"), this);  Rotate90action->setstatustip (tr ("Get Rotate90 image"));  Connect (rotate90action, SIGNAL (triggered ()), this, SLOT (ShowRotate90 ()));  180°  rotate180action = new Qaction (Qicon (":/rotate180.png"), tr ("Get rotate180"), this);  Rotate180action->setstatustip (tr ("Get rotate180 image"));  Connect (rotate180action, SIGNAL (triggered ()), this, SLOT (ShowRotate180 ()));  270°  rotate270action = new Qaction (Qicon (":/rotate270.png"), tr ("Get rotate270"), this);  Rotate270action->setstatustip (tr ("Get rotate270 image"));  Connect (rotate270action, SIGNAL (triggered ()), this, SLOT (ShowRotate270 ()));

The specific implementation of the slot function:

Rotates 270 degrees void imageprocessor::showrotate270 () {  if (Img.isnull ())    return;  Qmatrix Matrix;  Matrix.rotate (+);    Rotate 90 degrees  img = img.transformed (matrix);    The image is rotated and then re  -assigned Showwidget->imagelabel->setpixmap (Qpixmap::fromimage (IMG));} Rotates 180 degrees void imageprocessor::showrotate180 () {  if (Img.isnull ())    return;  Qmatrix Matrix;  Matrix.rotate (+);    Rotate 90 degrees  img = img.transformed (matrix);    The image is rotated and then re  -assigned Showwidget->imagelabel->setpixmap (Qpixmap::fromimage (IMG));} Rotates 90 degrees void Imageprocessor::showrotate90 () {  if (Img.isnull ())    return;  Qmatrix Matrix;  Matrix.rotate (+);    Rotate 90 degrees  img = img.transformed (matrix);    The image is rotated and then re  -assigned Showwidget->imagelabel->setpixmap (Qpixmap::fromimage (IMG));}

Implementation results:

"QT5 Development and examples" 14. Implement a simple text editor 3