Any good tutorials on this?

[Adagio]

I have spent a lot of time trying to find a good tutorial on GDI+, but so far no luck

I can find lots of tutorials telling me how to load an image and show it, that's not the problem, my problem is I have no idea how to do this based on what I do later in the program. Right now I'm just trying to get a simple hover effect (mouse off the image, show image1, mouse over image, show image2)

My coding 'seems' correct, as if I start the program with the mouse over the image, image2 is shown, else image1 is shown. This is how it should be. Though when I move the mouse out of (or into) the image nothing happens, though by using breakpoints I'm 100% sure that the draw() method is run

 

[vis781]

Could you post a code snippet so we could take a look?

As for GDI+ tutorials, my advice ( and this is how i did it ) Buy a good book, play around with it loads! and
if you get stuck, post the question on this forum.

 

[Adagio]

Do you have any book recommendations?

Here's some code:

My class that handles graphics objects:

Public Sub drawHover()
Bitmap loadedPictureHover = Bitmap.FromFile(Application.StartupPath + IMAGE_PATH + picture + "Selected.jpg")
DrawGraphics.DrawImage(loadedPictureHover, location)
End Sub

Public Sub draw()
Bitmap loadedPicture = Bitmap.FromFile(Application.StartupPath + IMAGE_PATH + picture + ".jpg")
DrawGraphics.DrawImage(loadedPicture, location)
End Sub

Sub New(ByVal pic As String, ByVal pnt As Point)
picture = pic
location = pnt
End Sub



This looks very simple. As mentioned in first post, the drawHover() is called whenever a mouse hovers over an image, and the draw() is when not

 

[Adagio]

DrawGraphics is located in another class (GameEngine class, which has all the objects of the graphics objects, etc)

Friend Shared DrawGraphics As Graphics

 

[vis781]

What are you trying to draw this image onto? i.e a control?, a graphics object you have created?
Also
The OnMouseHoverEvent i assume is where you are calling this sub, then is the acutal painting being done in the paint event?

 

[Adagio]

I have a form with an Image, which I use to draw on. I have an MouseMove Event for this picture, which then calls the draw method

The mousemove looks like this:

Private Sub imgGameField_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles imgGameField.MouseMove
Dim i As Integer

For i = 0 To 3
If hoverButton(game.shpAnswer(i), e) Then
game.shpAnswer(i).drawHover()
Else
game.shpAnswer(i).draw()
End If
Next
End Sub

Private Function hoverButton(ByVal shpButton As Shapes, ByVal e As System.Windows.Forms.MouseEventArgs) As Boolean
If e.Location.X > shpButton.location.X And e.Location.X < shpButton.location.X + shpButton.width And e.Location.Y > shpButton.location.Y And e.Location.Y < shpButton.location.Y + shpButton.width Then
Return True
Else
Return False
End If
End Function