QT - a C based GUI

1
QT - a C based GUI

• QTs
• Designer
• and
• Assistant

2
What we are about!

• downloading QT
• setting up your environment
• QT Assistant and QT Designer
• The QT Designer Quick Start Tutorial

3
QT Availability

• QT can be downloaded from the internet for either
  a PC or Unix
• www.trolltech.com
• The PC version runs on many different variations
  of Windows from Windows 95 up.
• Installation is straight forward.
• QT is installed on acad and intmain.
• needs xterm to run.

4
Setting up your Environment

• Set up your environment
• include /usr/local/qt/bin
• in your path variable
• include setenv QTDIR "/usr/local/qt
• for your environment
• In your home directory, make a subdirectory qt
  for your qt applications

5
Testing the setup

• cd qt
• mkdir hello
• cd hello
• cp /export/home/public/gordon/cis520/hello.zip .
• Unzip the file
• Give the following commands
• qmake project // builds the project file
• qmake // builds the Makefile
• make // the executable
• hello // is the directory name

6
Examples

• In QTDIR/examples, there are more than 76
  examples that can be copied and studied.
• Only the DB examples dont work, since no drivers
  come with the free version
• Feel free to browse the examples.

7
Using QT

• Usually you want to put all the code for a
  project in a single directory.
• Our first project will come from QTs tutorial
  a GUI metric conversion
• cd qt
• mkdir metric
• cd metric

8
Starting Assistant and Designer

• To start QT Assistant, give the command
• assistant
• To start QT Designer, give the command
• designer

9
Quick Start

• We will do the quick start tutorial for QT
  Designer which is found in QT Assistant
• From the Home Page of QT Assistant, scroll down
  to the Tools section, select QT Designer, and
  then select Quick Start
• We will build a complete working example in about
  an hour. We will then use what we learned to
  complete a project that accesses an Oracle
  database with Object-Oriented approach.

10
Starting and Exiting Qt Designer

• Starting
• To start Qt Designer under Windows click the
  Start button and click ProgramsQt
  X.x.xDesigner. (X.x.x is the Qt version number,
  e.g. 3.2.1.)
• If you're running a Unix or Linux operating
  system you can either double click the Qt
  Designer icon or enter designer in an xterm.
• Start Qt Designer now. When Qt Designer starts,
  it shows the New/Open dialog. We'll just click
  Cancel to skip it.
• Exiting
• click FileExit you will be prompted to save any
  unsaved changes.

11
The Metric Conversion

• start assistant
• assistant
• open the quick start tutorial in QTs assistant
• open designer
• follow the tutorial