Exam (elaborations)
INF2611 EXAM PACK
- Course
- Visual Programming II
- Institution
- University Of South Africa
Exam of 191 pages for the course Visual Programming II at University of South Africa (INF2611 EXAM PACK)
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TABLE OF CONTENTS
NOVEMBER 2017
JUNE 2017
NOTES
QUESTION PAPERS
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Question 1)
1.1)
a)
Use LCD Number widget (QLCDNumber class) to display decimal,
Use QTimer class to perform repetitive timer class
b)
The value() method of the QLCDNumber class returns the numerical value displayed by the LCD
Number widget
c)
The setMode() is used change the base of the numbers (Hex, Dec, Oct, Bin)
self.lcdNumber.setMode(QLCDNumber.Dec)
1.2)
a)
Timers is used to perform a repetitive task; to use a timer you have to create an instance of QTimer
class
b)
setSingleShot(true): set the timer to generate a timeout() signal only once
singleShot(n): set the timer to generate a timeout() signal only once after n millisecond
1.3)
a)
The purpose of selectionChanged() signal is to call function dispdate when a calendar date is
changed
b)
The name of the function that retrieves the date selected by the user is selectedDate() of the
calenderWidget, and the widget that displays the output is the object of the QDateEdit (dateEdit)
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