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Comment: Migrated to Confluence 5.3
by Unknown user

Read Part 1

I like to start just about any development project with unit tests, but part of this project involves UI code and that isn't something that's usually easy to plug into a unit test. 

...

Code Block
linenumberstrue
                                                PROGRAM
                                                MAP
                                                END
    include('CML_UI_ListCheckbox.inc'),once
ListCheckbox                                    CML_UI_ListCheckbox
x                                               long
CheckboxQueue                                   queue
Checked                                             bool
CheckedIcon                                         long
CheckedText                                         string(30)
                                                end
WINDOW                                          WINDOW('UITest'),AT(,,205,234),GRAY,FONT('Microsoft Sans Serif',8)
                                                    LIST,AT(21,12,161,185),USE(?List),VSCROLL,FROM(CheckboxQueue), |
                                                        FORMAT('14L(2)|M~X~100L(2)|M~Text~')
                                                    BUTTON('Close'),AT(84,206),USE(?ButtonClose),STD(STD:Close)
                                                END
    CODE
    loop x = 1 to 100
        clear(CheckboxQueue)
        CheckboxQueue.CheckedIcon = random(01,12)
        CheckboxQueue.CheckedText = 'String ' & x
        add(CheckboxQueue)
    end
    open(window)
    ListCheckbox.Initialize(?List)
    accept
    end
    close(window)

...

The first field in the queue will be used to display the check box, which means displaying an icon. And any field that displays an icon needs to have a Long variable immediately following it. 

A word on CML classes

I'm going to be releasing the classes from this article series as part of the The ClarionMag Library, so they all follow the CML compiling convention which by default expects to find the classes in CMagLib.DLL.

...

Now the list box displays the icons (randomly set to checked or unchecked) but I'm still seeing the zero value displayed.  

Image RemovedImage Added

I learned how to fix this from Pete Halsted (see http://archive.clarionmag.com/cmag/v1/v1n11checkbox.html). The trick is to use a picture that specifies a space:

...

Now the list box is rounding into shape:

Image RemovedImage Added

But there's still a potential issue with those icons. I'll either have to ship them with the product or link them into the program. I'd rather do the latter. 

...

Now the icons are automatically linked in; I don't have to worry about adding anything to the project or shipping .ico files with the product. 

For your reference, here is the class header:

Code Block
    include('CML_IncludeInAllClassHeaderFiles.inc'),once

CML_UI_ListCheckbox                             Class,Type,Module('CML_UI_ListCheckbox.CLW'),Link('CML_UI_ListCheckbox.CLW',_CML_Classes_LinkMode_),Dll(_CML_Classes_DllMode_)
ListFEQ                                             long
Initialize                                          procedure(long listFEQ)
                                                End

And the class code:

Code Block
                                            Member
                                            Map
                                            End
    Include('CML_UI_ListCheckbox.inc'),Once
    !include('CML_System_Diagnostics_Logger.inc'),once
!dbg                                     CML_System_Diagnostics_Logger
CML_UI_ListCheckbox.Initialize                  procedure(long listFEQ)
    code
    self.ListFEQ = ListFeq
    self.ListFEQ{PROPLIST:Icon,1} = 1
    self.ListFEQ{PROP:IconList,1} = '~CML_UnChecked.ico'
    self.ListFEQ{PROP:IconList,2} = '~CML_Checked.ico'  
    self.ListFEQ{PROPLIST:Picture,1} = '@p p'
    pragma('link (CML_Checked.ico)')
    pragma('link (CML_UnChecked.ico)')

Next time: Making the Initialize call more flexible, and turning checkboxes on and off.