CODEWITHSUNDEEP
c++qtwidget
Alan Cor
Alan Cor

Reputation: 236

Guidance on creating a widget

I would like to display some values into a widget in a similar way as the mechanical counters in a power meter. I have so far only written a function to split the total value into a single digit corresponding to the required position, it looks something like this:

    unsigned long value; // variable holding the value to be displayed

    ....... get the actual value

    int firstPosition  = value % 10;             // 0-9 
    int secondPosition = int(value*0.1) % 10;    // 0 - 9 * 10
    int thirdPosition  = int(value*0.01) % 10;   // 0 - 9 * 100
    int fourthPosition = int(value*0.001) % 10;  // 0 - 9 * 1000
    int fifthPosition  = int(value*0.0001) % 10; // 0 - 9 * 10000

Now the actual question, how can I perform the actual animation in order to get a similar behaviour as in a physical device? Has anybody done something similar?

Please note that I am using Qt libraries, just in case it makes a difference.

Cheers.

Upvotes: 0

Views: 91

Answers (1)

koan
koan

Reputation: 3686

See the analog clock tutorial at http://qt-project.org/doc/qt-5.0/qtwidgets/widgets-analogclock.html

A one second timer is used to animate the clock, by calling update().

During the paintEvent() the widget is drawn for the current time.

Upvotes: 1

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