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Lab 13: Check box widget

1. Description
2. Copying Visual Studio Project
3. Adding widgets in FLUID
4. Adding code to support the check box
5. How to submit

Description

• In Lab 12 we made a list of choices for drawing shapes. In this exercise, we add a check box (Fl_Check_Button) to specify an optional "Filled" selection for circles and rectangles:

   

  When "Line" shape is selected, the "Filled" check box becomes disabled (grayed out on the user screen.)

   

Copying Visual Studio Project

• Make a copy of Lab 12 subfolder

  
      c255labs\labs\c255_lab12_radio_btn
  
  

  or download and unzip Lab_12_radio_btn.zip

• Rename the new folder as c255_lab13_check_box.

• Open solution file in Visual Studio and finish the usual steps to rename the project.

   

Adding widgets in FLUID

• Start FLUID program and open project

  
      c255labs\labs\c255_lab13_check_box\fluid_project\CFluidWindow.fl
  
  

• Select Window win_app object in FLUID tree view. Use menu

  
      New/Buttons/Check_button...
  
  

  Verify that the properties/C++ class type is set to Toggle.

• Name the widget in Properties/C++ as chk_filled

• Save FLUID project and generate C++ code by

  
      File/Write Code...
  
  

   

Adding code to support the check box

• Open solution

  
      c255labs\labs\c255_lab13_check_box\c255_lab13.sln
  
  

  in Visual Studio.

• Download the new versions of

  • CMainWindow.h

  • CMainWindow.cpp

• Compile and test the program.

• Use WinMerge to compare the old and the new versions of the files. What are the differences? Explain the implementation of functions

  
      CMainWindow::show()
      CMainWindow::callback_check_button()
      CMainWindow::click_check_button()
      CMainWindow::click_radio_button()
  
  

   

How to submit

• This is a self-learning lab. There are no files to submit. Make sure to complete all required steps to build and test the project on your own home computer.