From Forum Nokia Wiki

ID		Creation date	22 December 2008
Platform	S60 3rd Edition, S60 5th Edition	Tested on devices	Emulator
Category	Qt for Symbian	Subcategory	Push buttons

Keywords (APIs, classes, methods, functions): QPushButton

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

• Install latest Qt for Symbian see Qt for Symbian - Installation packages
• Go through this article: Getting started with Qt for Symbian

Various Function

• Push buttons are created without text label also and later on setText() methods can be used to set the label.

 QPushButton button;
 button.setText("hello");

• We can also add icon to the button using the following method:

 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);

• For resizeing the button we have the method:

 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 methods 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 *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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This article shows the method of the Button like icon setting, enable disabled mode. I think in every application where button is used , this example is very useful.

$

[--Fasttrack 19:29, 11 September 2009 (UTC)]

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