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Revision as of 20:07, 9 September 2009 by valderind4 (Talk | contribs)

Archived:How to use QPushButton

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Article Metadata
Tested with
Devices(s): Emulator
Compatibility
Platform(s): S60 3rd Edition, S60 5th Edition
Symbian
Article
Keywords: QPushButton
Created: (22 Dec 2008)
Last edited: valderind4 (09 Sep 2009)

Contents

Overview

Push button is simply a rectangular command button with a text label printed on it. In most of the graphical user interface buttons are used to give command to computer or mobile to do certain task.

Preconditions

Various Function

  • Push buttons are created without text label also and later on setText() function can be used to set the label.
 QPushButton button;
 button.setText("hello");
  • We can also add icon to the button using the following function.
 button.setIcon("c://icon.jpg");
  • To disabled the button we can use
 button.setDisabled(true);
  • To set the button visualization Flat from default(3D) button.Figure given below shows that button "Hello" is flat and button "Bye" is graphical(3D)
button.setFlat(1);

FlatButton.JPG

  • For resizeing the button we have the function
 button.resize(100,20);// first argument is width and second is the height.
  • When user click on the button, it emits different signal like clicked() when it is activated by the mouse click, pressed() or released(). This signal can be connected to the slot to perform the task.
  • Command buttons becomes the default push button automatically when they receive the focus. A default button is a push button that is activated when the user presses the Enter or Return key in a dialog. By default all the buttons are created auto default. You can change this with setAutoDefault(). Auto-default buttons needs a little extra space which is necessary to draw a default-button indicator. If you do not want this space around your buttons, call setAutoDefault(false).
 button.setAutoDefault(false);
  • There are many other function available that can be use with push button. You can get more detail on push button at

http://pepper.troll.no/s60prereleases/doc/qpushbutton.html

Screen Shot

QPushButton.JPG


QPushButton *button = new QPushButton("Quit");
QObject::connect(button, SIGNAL(clicked()),&a, SLOT(quit()));
button->show();
  • Read more

QPushButton

Related Links

Creating Menu from QPushButton

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