Displaying text on a screen/form

Discussion in 'Questions (Windows Mobile)' started by Dragonspank, Jan 30, 2008.

  1. Dragonspank

    Dragonspank Member Licensed User

    Ok, haven't done any basic programming since days of Commodore64 basic.
    Dumb question:
    How do you print text on the screen/form? Say for example that I had a variable named "tries" that I wanted to display in the bottom left hand corner.And a percentage in the right hand corner.
    Any help greatly appreciated.
  2. Cableguy

    Cableguy Expert Licensed User

    You have several ways to Write on the screen, the most coomon is a lable, wich the user has no action on...
    You can also use a textbox, but it is changeable by the user, and it's main purpose is to allow the imput of value or text...
    The "last" option is to write directly on the form with DrawString...
    U just have to decide what is best for your app...
  3. Leginus

    Leginus Member Licensed User

    If you look in the help section of Basic4ppc it will give you a section Called Main Help. Under here you will find Controls and under here Form as an object and it will give you the properties that are available.

    The reason I mention this is not to be condscending, but for the simple fact that I think the this is a good help file as it does actually give real examples.

    Anyway to display text on a form it is with your variable it would be
    DrawString (String, FontSize, X1,Y1,X2,Y2, (R,G,B | Color Constant))


    sub App_Start()
    dim Tries
    Tries="Tries Text"

    Form1.DrawString (Tries,0, 320, 0, 320, 80, 0, 0, 255)
    End Sub
  4. Dragonspank

    Dragonspank Member Licensed User

    Need a liitle more info on the allowed values for x1.x2,y1,y2.
    I have a square screen 240 x 240.
    Also, if I did have a statement such as:

    Form7.DrawString (Tries,9, 200, 320, 50, 155, 0, 0, 255)

    And the variable Tries was equal to 1 the first time through. Next time through it is equal to 2. But when it is displayed the 2nd time it writes the "2" right overtop(overlapping) of the "1" and it is then impossible to tell what the number is supposed to be. Could I not just write a DrawString statement to erase the old value with blank spaces and then rewrite the new value? (I have tried and no avail with--- Form7.DrawString (" ",9, 200, 320, 50, 155, 0, 0, 255))
  5. klaus

    klaus Expert Licensed User

    If your text is always at the same position you should use a Label control.
    Position the control at the place you want in the Form Designer or by code.
    By code it would be
    Sub App_Start
    End Sub
    These are the coordinates of the upper left corner of the control.

    If your control is already on the right position in the Designer no need to do it by code. In the Designer you can display a default text or make it empty.

    Then in your code you set
    This displays the value of your variable Tries on the Label without overlapping characters.

    I joined a small example.
    With the Button you increase a number by one and display it in the Label.


    Attached Files:

    • Test.sbp
      File size:
      507 bytes
  6. Leginus

    Leginus Member Licensed User

    If there is no particular reason to draw direct to the screen, then a label would be you best option. see atached file
  7. Dragonspank

    Dragonspank Member Licensed User

    Anyway to make the box part of the label transparent?
  8. Cableguy

    Cableguy Expert Licensed User

    When workin with drawstring, to write on the same place 2 or more diferent strings...
    before writing the new string, re-write the previous, with the color set to match the background, thus making it invisible...
    There is also a method to erase a part of the screen...
    Search trought the forelayer bit of the help file...
    Last edited: Jan 30, 2008
  9. Dragonspank

    Dragonspank Member Licensed User

    It does when your form is an image. :(
  10. Cableguy

    Cableguy Expert Licensed User

    Sorry edited the post in the meanwhile...new info..
  11. klaus

    klaus Expert Licensed User

    You can set the Color of the label the same as the color of the Form or the color of the image, no transparency.
    With DrawString you can use FDrawString to draw on the ForeLayer, the Forelayer can be set to transparent with SetTransparentColor
    Sub App_Start
    SetTransparentColor (cWhite)
    Form1.ForeLayer = True
    End Sub

    But in your case the transparency of the Forelayer will not help, the problem of overlaying the texts remains. Still the best way will remain the Label with a background color similar to the image.

    Last edited: Jan 31, 2008
  12. klaus

    klaus Expert Licensed User

    To draw the string on the Form there is a solution with libraries, it's not the easyest way but it works.
    The solution is to copy the part of the Form image where the string should be, in a bitmap object.
    Then every time, before you draw a new string, copy back the stored original partial image.
    Joined a test program.

    Hope this helps you.

    Best regards
  13. RandomCoder

    RandomCoder Well-Known Member Licensed User

    This may be a little late in the game but you could use FErase to remove the previous number.
    You only need to remove the area occupied by the number.
    Using this along with FDrawString should work.

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