The Coffee Project

 

File-New to get the new dialog box

Select MFC AppWizard (exe) as the project type

Click on the button next to Location and browse to the directory you’re using for your projects in Visual C++

Type Coffee for the project name

Click OK to get the first AppWizard dialog box to appear.

 

We want a Dialog based application in English

Click NEXT button

 

 

Enter ‘The 330 Coffee Bar’ as the title for the dialog

Click Next – the 3^rd AppWizard dialog box appears

 

 

We want a standard MFC application with source code comments being generated and using the MFC library as a shared resource (to save space).

 

Click Next buttton.

Click Finish – to accept all of the default values.  The new project information box appears

 

Click OK button

 

 

Open the Build menu and click on Set Active Configuration.

Click on Coffee - Win32 Release.  This speeds up the subsequent build process by not including any debugging information.  This is ok for small projects.

Click OK.

 

 

Adding a Group Box

Click on the ResourceView tab

Expand the Dialog folder

Double-click on IDD_COFFEE_DIALOG  to display the Coffee Bar dialog box

 

 

Click on the OK button to select it,  then delete it using the Delete key.

Delete the Cancel button and the TODO text.

 

Right click on the empty dialog box, and select Properties

Click the Font button, and change the default font to Times Roman 14 point

 

 

Click on the group box control and draw the box in about the top third of the dialog box

Right click on the box border ... and select Properties

Fill in the caption box with "Good Morning. Please enter your last name and your sex"

 

Adding an Edit Box

Click on the Static Text control in the tool box.  Draw the control near the left side of the group box.  Make sure the left border isn't  touching the group box border.

Right-click on the static text control ... select Properties

Change the Caption to Last Name

 

 

In the toolbox, now add an edit box control ... right click it ... select Properties... and change the ID to IDC_LNAME_EDIT

 

 

 

Adding Radio Buttons - allows selection of one of a number of alternatives

** These should always be created in sequence!! ***

 

Click the radio button control in the toolbox

 

Draw the button.  In  the same way, draw a second button to the right of the first

 

Change the ID properties to IDC_MALE_RADIO and IDC_FEMALE_RADIO

 

Change the captions to &Male and &Female - & denotes the underline and the keyboard selection character

 

Click on the Group box for the first button.  It indicates that it's the first button of a group.

 

 

 

Check to make sure that the radio buttons are numbered in sequence.  

Click  View and select Resource Symbols and then check the sequence numbers

 

 

 

 

Adding Check Boxes - allows one or more than one choice to be selected

Using the toolbox, add another group box to the middle third of the screen

Make its caption How would you like your coffee?

Add 3 check boxes -

·         IDC_CREAM_CHECK   captioned With &Cream

·         IDC_SUGAR_CHECK  captioned With &Sugar

·         IDC_SCOTCH_CHECK captioned With &Scotch

 

 

 

 

 

 

 

 

 

 

Finally, add a command button, with an ID of IDC_ORDER_BUTTON, and a caption of &Place Your Coffee Order

 

 

Here's what everything should now look like -

 

Coding the Program

* Declare member variables for the controls that get data from the user:,  the edit box, radio buttons, and the check boxes;

* Make the program set initial values for the controls when it first loads;

* Attach 'event code' to the controls so that they respond correctly when the user clicks on them;

* Exchange data between the controls and their member variables  by calling the UpdateData( ) function

 

Declaring Member Variables

The program can't directly read the edit box contents.  The data must first be copied to a member variable, then the program can access it and use it inside of a message box.

 

Open ClassWizard (View-ClassWizard) and select Member Variables tab

Click on Add Variable

Make the member name m_SexRadio

Similarly, add the following member variables -

Control                                     Variable Name

IDC_CREAM_CHECK                m_CreamCheck

IDC_SUGAR_CHECK                 m_SugarCheck

IDC_SCOTCH_CHECK               m_ScotchCheck

IDC_LNAME_EDIT                     m_LnameEdit

 

 

 

 

 

 

 

When done, do a File-Save

 

 

Initializing the Controls

The only control that really needs to be initialized is the &Male radio button ...

The OnInitDialog event starts when the program loads ... so we put initialization code there ...

 

In ClassWizard, click on Message Maps tab

Make sure the class name is CCoffeeDlg

In ObjectIDs, make sure that CCoffeeDlg is selected

In the Messages list, select WM_INITDIALOG  (WM = windows message)

 

Click on OK

 

 

Then  click the Edit Code button. 

The main C++ code file is opened, coffee.cpp, with the OnInitDialog( ) function displayed.

Scroll down to the line that says // TODO: add extra initialization code

Add the following code:

M_SexRadio = 0;         / / the first button will be selected to start

UpdateData(FALSE);    // copies data from member variables to their associated controls

                                    // TRUE copies data from controls to member variables

 

 

Do a File-Save All

 

Build and run it ... notice that  the Male Button is selected.

 

 

 

Attaching Code to Radio Buttons

ClassWizard - Message Maps

Make sure the CCoffeeDlg is in the class name box

In the ObjectID list, select IDC_MALE_RADIO

In the Messages list, click on BN_CLICKED.

Click on Add Function button ... click OK to select the default

Click on Edit Code ... the OnMaleRadio( ) function appears

Add:  m_SexRadio = 0;

 

 

 

 

 

Using the same method, create an OnFemaleRadio() function and add

            m_SexRadio = 1;

 

Note, adding code to check boxes is identical to adding code to radio buttons.

 

 

 

 

 

Adding Code to the Command Button

ClassWizard - Message Maps

Make sure the CCoffeeDlg is in the class name box

In the ObjectID list, select IDC_ORDER_BUTTON

In the Messages list, click on BN_CLICKED.

Click on Add Function button ... click OK to select the default

Click on Edit Code ... the OnOrderButton( ) function appears - add the following code:

void CCoffeeDlg::OnOrderButton()

{

      // TODO: Add your control notification handler code here

      CString Salutation;

      CString CoffeeStuff;

 

      UpdateData(TRUE);

 

      CoffeeStuff = "";

 

      if (m_CreamCheck)

            CoffeeStuff += "Cream";

      if (m_SugarCheck)

            CoffeeStuff += "\nSugar";

      if (m_ScotchCheck)

            CoffeeStuff += "\nScotch";

 

      if (m_SexRadio == 0)

            Salutation = "Mr. ";

      else

            Salutation = "Ms. ";

 

      MessageBox("Good Morning, "+Salutation+m_LnameEdit, "The Coffee Program");

 

      MessageBox("Your coffee will be served with: \n" + CoffeeStuff, "The Coffee Program");

            }

 

 

 

Rebuild ... and run ... pick some options.

 

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Created and last update by DrB on Friday, July 30, 2004 10:58 AM