Question

Programming an array

Asked by: sage55

This is what I have on my form:

5 - Option Buttons in an array with the text pizza, coke, etc.
1 - A picture box
5 - Thumbnail Images of a pizza, coke, etc, in an array

What I want to do it when I click on one option button labled Pizza the thumbnail of the pizza is displayed in the picture box.


How do I go about doing this?

Please excuse me as I am trying to learn the basic stuff of VB.


-sage

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Asked On
2002-12-02 at 12:37:19ID20413164
Tags

array

Topic

Visual Basic Programming

Participating Experts
4
Points
300
Comments
11

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Answers

 

by: wes_wilsonPosted on 2002-12-02 at 13:40:29ID: 7522109

I'm going to make a couple of assumptions, and if they are true this code should work.  First I'm assuming that elements in your arrays match together, element 0 in your buttons array is pizza and element 0 in your thumbnails array is pizza as well.  Second, I'm assuming that your thumbnail array just holds the path to the picture ("C:\mypicture.bmp") that kinda thing.  
btnArray is the name of the option button array, Picture1 is the name of your picture box and ThumbnailArray is the name of the array containing your thumbnails.

Good Luck
-Wes


Private Sub btnArray_Click(Index As Integer)
   Picture1.Picture = LoadPicture(Thumbnailarray(Index))
   Picture1.Refresh
End Sub


 

by: rspahitzPosted on 2002-12-02 at 13:40:48ID: 7522111

I would start by making sure that all the option buttons have the same name but a different index value (i.e. a control array of option buttons.)

Next, load you image names into an array variable holding these names, synchronized with the option button numbers.

Then, when the option button is "click"ed, load the corresponding image into a picturebox.

The code would look something like this:

private sub optFoodItem_Click(Index as Integer)
  picFoodItem.Picture = LoadPicture(m_strImagePathArray(Index))
end sub

obviously, elsewhere you need code like this:

Private m_strImagePathArray() as string

...
  m_strImagePathArray(0) = "C:\Project\Images\Pizza.gif"
  m_strImagePathArray(1) = "C:\Project\Images\Soda.gif"
...

 

by: rspahitzPosted on 2002-12-02 at 13:41:51ID: 7522115

I guess I made the same assumptions as wes_wilson, but submitted a few seconds late!

 

by: wes_wilsonPosted on 2002-12-02 at 13:44:06ID: 7522125

can we split points?

 

by: rspahitzPosted on 2002-12-02 at 14:22:27ID: 7522250

Well, don't jump the gun.  But, the general rule is user should pick the first answer that solves the problem unless another answer offers significantly more value.

That said, points can be split by going the customer support and asking for it.

Also, I see that the original says, "thumbnail images...in an array"

sage55, how are the images stored in the array?  is it an array of pictureboxes?

 

by: ArkPosted on 2002-12-02 at 16:30:25ID: 7522749

Hi
IMHO it's array of StdPictures (BTW, I thing it's a better solution then load pictures from HDD every time - to load them when form loading or splash screen displayed).

'In General declaration area
Dim sPic(4) As StdPicture

Private Sub Form_Load
   Set sPic(0) = LoadPicture("c:\Temp\pizza.gif")
   Set sPic(1) = LoadPicture("c:\Temp\coke.gif")
   Set sPic(2) = LoadPicture("c:\Temp\xxxxx.gif")
   Set sPic(3) = LoadPicture("c:\Temp\xxxxx.gif")
   Set sPic(4) = LoadPicture("c:\Temp\xxxxx.gif")
End Sub

Private Sub Option1_Click(Index As Integer)
   Picture1.Picture = sPic(Index)
End Sub

Private Sub Form_Unload (Cancel As Integer)
   Dim i As Long
   For i = 0 To 4 'Free memory
       Set sPic(i) = Nothing
   Next i
End Sub

Regards
Ark

 

by: sage55Posted on 2002-12-02 at 21:29:25ID: 7523832

Ok Im sorry, maybe I wasnt clear enough. Here is a lil more detail on what I need and have.

What I have:

5 - Option Buttons in an array with the captions being pizza, coke, etc... (optElement)

1 - Large empty Image control (imgPicture)

5 - Image controls in an array with small images of a pizza, coke, etc... (imgElement)

I need the project to make the imgElement controls invisible when the interface first starts, and when an option button in the option array is clicked the matching imgElement is shown in (imgPicture).

I hope this is a little more clear.


-sage

 

by: TigerZhaoPosted on 2002-12-02 at 21:38:01ID: 7523853

Private Sub Form_Load()
    imgElement.Stretch = True
End Sub

Private Sub optElement_Click(Index As Integer)
    Set imgElement.Picture = imgPicture(Index).Picture
End Sub

 

by: rspahitzPosted on 2002-12-03 at 08:07:00ID: 7525932

>I need the project to make the imgElement controls invisible when the interface first starts,

Private Sub Form_Load()
'...
   dim ctlImageControl as Control
   for each ctlImageControl in Me.Controls("imgElement")
     ctlImageControl.Visible = False
   next ctlImageControl
'...
End Sub

>...and when an option button in the option array is clicked the matching imgElement is shown in (imgPicture).

(I think that Tiger got it reversed.)

private sub optElement_Click(Index as Integer)
 Set imgPicture.Picture = imgElement(Index)
end sub


Ark>BTW, I thing it's a better solution then load pictures from HDD every time - to load them when form loading or splash screen displayed

In this case, that is probably true since the elements will likely be switched somewhat frequently, but there is no standard on whether it's better to load from disk or pre-loaded memory.  If you have the speed and RAM, then pre-loading (or even thread-loading) is great; if not enough speed or RAM, load-on-demand can be better when the image is not switched a lot.

 

by: sage55Posted on 2002-12-03 at 11:02:30ID: 7526918

This is exactly what I was looking for.


Thanks,

sage

 

by: rspahitzPosted on 2002-12-03 at 13:27:19ID: 7527629

Glad it's what you wanted.  Thanks for the "A".

20120131-EE-VQP-002

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