Common Methods of QPushButton in Qt.

Constructor:

• You can create a QPushButton using different constructors, typically specifying the button’s text label and the parent window (parent widget) in the constructor.

#include <QPushButton>
QPushButton *button = new QPushButton("Click Me", parentWidget);

• Set Text Label (setText):

  • Use the setText method to set the text label displayed on the button.

  button->setText("New Label");
  

• Set Icon (setIcon):

  • You can use the setIcon method to set an icon as the button’s image, enhancing its visual appeal.

  QIcon icon("path/to/icon.png");
  button->setIcon(icon);
  

• Set Shortcut (setShortcut):

  • Buttons can be associated with a keyboard shortcut, and when the user presses the shortcut key, the button’s click event will be triggered.

  button->setShortcut(QKeySequence(Qt::CTRL + Qt::Key_A));
  

• Set ToolTip (setToolTip):

  • Use the setToolTip method to add a tooltip to the button. When the user hovers the mouse over the button, related information is displayed.

  button->setToolTip("This is a QPushButton");
  

• Set Status Tip (setStatusTip):

  • Similar to tooltips, the setStatusTip method is used to set a status tip, often for displaying longer descriptive information.

  button->setStatusTip("This button performs a specific action.");
  

• Signals and Slots:

  • Typically, you use signals and slots to handle the button’s click event. When the button is clicked, it emits a click signal, which can then be connected to a slot function that performs the desired action.

  connect(button, SIGNAL(clicked()), this, SLOT(handleButtonClick()));
  

• Enable and Disable (setEnabled):

  • Use the setEnabled method to disable or enable the button. A disabled button cannot be clicked by the user.

  button->setEnabled(false); // Disable the button
  button->setEnabled(true);  // Enable the button