[RESOLVED] An Image conversion problem

[pourkascheff]

I'm using a third party tooltip control called AI Control.dll and 2 questions about it.

On every control, a ToolTip1 property is added in term of "Title", "Caption" and "Image". In code view "ToolTip1.SetToolTipImage" does exist.
1) Does it mean if I change it from here, (to some sort of blue (i) information icon) it applies for every single control? Cause I want to do so.

Selecting an image through its OpenFileDialog supports *.ico/*.png/*.jpg/*.gif/*.emf/*.wmf/*.bmp files. But I want to use system built in icons. I failed in data type conversion again I suppose.
2) How can I forcefully feed system icons in it? Their larger sizes are better in case of conversion supports.

What I tried:

ToolTip1.SetToolTipImage(SystemIcons.Information)

and

ToolTip1.SetToolTipImage(SystemIcons.Information.ToBitmap)

Same error:
Argument not specified for parameter 'value' of 'Public Sub SetToolTipImage(obj As Object, value As System.Drawing.Image)'.
Thanks.

* Update:
- There is another .GetToolTipImage method but no idea what it does. They didn't provide comments and descriptions. VS only hints with types which are obj for .SetToolTipImage() argument and ctrl for .GetToolTipImage argument.
- I also failed to get MsgBox(ToolTip1.SetToolTipImage.GetType.ToString) to find out which type it requires.

[jmcilhinney]

The standard ToolTip implements the IExtenderProvider interface. This custom ToolTip appears to do the same, which makes sense. The idea of that interface is that it appears to extend other controls in the designer by adding properties to them. That is smoke and mirrors though, and it's actually method of that type under the hood. If you want to see an example of implementing that interface to see how it works, check out this CodeBank thread of mine:

https://www.vbforums.com/showthread....rays-in-VB-NET

As you can see from that thread, a class that implements IExtenderProvider has a CanExtend method, so you could use that to determine what objects you can pass to SetToolTipImage. Logically though, why would it be anything other than a control? The whole point of a ToolTip is to display information about an element in a UI, i.e. a control. What else would you want a ToolTip on?

You showed the signature of SetToolTipImage yourself and so you know it has two parameters, not one, and the second is the Image object. The first is the control on which the ToolTip is to be displayed with the specified Image. You might want a ToolTip displayed on a Button with one Image, on a TextBox with a different Image and on a Label with no Image. If you do it in the designer, you set the property on each of those controls. If you do it in code, you call the method and pass each of those controls as the first argument.

[pourkascheff]

Sorry, I didn't follow. I will reread your reply but still digesting it is quite a huge work...


I can manually do this with a png via propertygrid of any control, manually. I assumed .SetToolTipImage() method sets an image for all programmatically.

Here's the commands list/description:


If standard ToolTip met the tooltip-title and its icon was below, next to the description with a bit larger icons, I definitely would stick to built-in controls which always make me feeling relief and ease.

[PlausiblyDamp]

Sorry, I didn't follow. I will reread your reply but still digesting it is quite a huge work...


I can manually do this with a png via propertygrid of any control, manually. I assumed .SetToolTipImage() method sets an image for all programmatically.

Here's the commands list/description:


If standard ToolTip met the tooltip-title and its icon was below, next to the description with a bit larger icons, I definitely would stick to built-in controls which always make me feeling relief and ease.

The screenshot of the intellisense tells you that the SetToolTipImage methods takes two parameters and that the image is the second parameter. This is also exactly what jmcilhinney told you in the 2nd post of this thread.

[pourkascheff]

Can you try with another words about required obj? A code example would be fantastic. What does it mean by object? I've never encounter with one. (Maybe in that timezone strings to object or vice versa I remember).

[OptionBase1]

Timezone strings? What is even happening in this thread?

You showed the signature of SetToolTipImage yourself and so you know it has two parameters, not one, and the second is the Image object. The first is the control on which the ToolTip is to be displayed with the specified Image. You might want a ToolTip displayed on a Button with one Image, on a TextBox with a different Image and on a Label with no Image. If you do it in the designer, you set the property on each of those controls. If you do it in code, you call the method and pass each of those controls as the first argument.

I've bolded it for you. I can't come there and type the code for you. Otherwise, there's always curling.

[pourkascheff]

Timezone strings? What is even happening in this thread?

XD It was a previous thread targeting similar object problem of mine. My bad.

Oh! Yes, it works:

    Private Sub Form3_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        ToolTip1.SetToolTipImage(Button1, SystemIcons.Exclamation.ToBitmap)
    End Sub

How can I set only one image for all controls? Is there a way to call them all instead of performing a for-loop to do it for all controls? (Only controls which already has a non-empty tooltip title and caption.)

[jmcilhinney]

How can I set only one image for all controls? Is there a way to call them all instead of performing a for-loop to do it for all controls? (Only controls which already has a non-empty tooltip title and caption.)

No, you would have to use a loop with an If statement or maybe a LINQ query with a filter. The method needs to be called once for each control.

[pourkascheff]

And how it could be?

For Each Control in Me.ControlCollection
ToolTip1.SetToolTipImage(Control, SystemIcons.Information.ToBitmap)
Next
?

[jmcilhinney]

How you get the list of controls is up to you and may depend on the specifics of your form design. If you want to do it for every control that is directly on the form and no others then you could do this:

Dim img = SystemIcons.Information.ToBitmap()
 
For Each cntrl In Controls
    ToolTip1.SetToolTipImage(cntrl, img)
Next

Note that I have created one Bitmap and used it repeatedly, rather than creating a new Bitmap object for every control when they will all be the same.

If the list of controls you want to use is different then you'll have to use different means to get it. You haven't explained what you want so we can't explain how to get it.