Qt custom tag button and qt custom tag

Qt custom tag button and qt custom tag

When you get started with Qt, you will be surprised by its extremely convenient cross-platform approach and want to try Qt. Gradually, you will find that some of Qt's built-in controls cannot meet your own needs. At this time, we need to define our own controls. In general, there are many tag style settings, but the default tag does not respond to events with the mouse.

Today, we bring you the tag button class. You can see from the name that the tag is changed to a button, so that the tag has the button and mouse response function.

In your Qt project

Add a new file: C ++ Class, input Class name: ClickedLabel, and base Class: QLabel. Qt automatically generates the ClickedLabel. h and ClickedLabel. cpp files.

In ClickedLabel. h

1 # ifndef CLICKEDLABEL_H 2 # define CLICKEDLABEL_H 3 4 # include <QLabel> 5 // night labels: 17/06/04 6 class ClickedLabel: public QLabel 7 {8 Q_OBJECT 9 public: 10 ClickedLabel (QWidget * parent = 0); 11 int MyLabelPressed; 12 void mousePressEvent (QMouseEvent * e); // Add the mouse RESPONSE event 13 void mouseReleaseEvent (QMouseEvent * e ); // Add the mouse release event 14 signals: 15 void clicked (); // click signal 16 17}; 18 19 # endif // CLICKEDLABEL_H

Then, set the default style in the constructor in ClickedLabel. cpp (Note: You can leave it empty) and add an initial value 0 to MyLabelPressed;

1 # include "clickedlabel. h" 2 3 ClickedLabel: ClickedLabel (QWidget * parent): QLabel (parent) 4 {5 setText ("Author: Night success! "); // Add the default label text 6 setAlignment (Qt: AlignCenter); // set the default alignment mode: center AlignCenter alignment) 7 // set the default label style 8 setStyleSheet ("ClickedLabel {background-color: rgb (143,122,102); border-radius: 10px; font: bold; color: white ;}"); 9 MyLabelPressed = 0; 10} 11 12 void ClickedLabel: mousePressEvent (QMouseEvent * e) 13 {14 MyLabelPressed = 1; 15} 16 17 void ClickedLabel: mouseReleaseEvent (QMouseEvent * e) 18 {19 if (MyLabelPressed) 20 {21 emit clicked (); 22 MyLabelPressed = 0; 23} 24}

Then, in your Qt project

Add a header function: # include "clickedlabel. h"

Add a private or public function: ClickedLabel * Btn1;

Then implement the function in the CPP file of the project file.