How to get image coordinates on a windows form and make sections clickable
Hello experts,
I am making a visual studio 2008 windows form. Within the form i have a picture box, with an image set to fill the entire control. I want to make certain portions of the image clickable.
First i need to get the coordinates of the mouse location, than define my rectangles on the image. Has anyone done this. I know in html you can use code like this:
<img src ="planets.gif" width="145" height="126" alt="Planets" usemap ="#planetmap" />
<map id ="planetmap" name="planetmap">
<area shape ="rect" coords ="0,0,82,126" href ="sun.htm" alt="Sun" />
<area shape ="circle" coords ="90,58,3" href ="mercur.htm" alt="Mercury" />
<area shape ="circle" coords ="124,58,8" href ="venus.htm" alt="Venus" />
</map>
Here is my window form code to get the mouse location of the click
'This code keeps the form from being moved, which will change the location of the mouse click
Protected Overloads Overrides Sub WndProc(ByRef m As Message)
Const WM_NCLBUTTONDOWN As Integer = 161
Const WM_SYSCOMMAND As Integer = 274
Const HTCAPTION As Integer = 2
Const SC_MOVE As Integer = 61456
If (m.Msg = WM_SYSCOMMAND) AndAlso (m.WParam.ToInt32() = SC_MOVE) Then
Exit Sub
End If
If (m.Msg = WM_NCLBUTTONDOWN) AndAlso (m.WParam.ToInt32() = HTCAPTION) Then
Exit Sub
End If
MyBase.WndProc(m)
End Sub
Private Sub PictureBox1_MouseClick(ByV
x = System.Windows.Forms.Contr
y = System.Windows.Forms.Contr
MessageBox.Show("You clicked x cor: " & x & " You Clicked y cord: " & y)
End Sub
I am making a visual studio 2008 windows form. Within the form i have a picture box, with an image set to fill the entire control. I want to make certain portions of the image clickable.
First i need to get the coordinates of the mouse location, than define my rectangles on the image. Has anyone done this. I know in html you can use code like this:
<img src ="planets.gif" width="145" height="126" alt="Planets" usemap ="#planetmap" />
<map id ="planetmap" name="planetmap">
<area shape ="rect" coords ="0,0,82,126" href ="sun.htm" alt="Sun" />
<area shape ="circle" coords ="90,58,3" href ="mercur.htm" alt="Mercury" />
<area shape ="circle" coords ="124,58,8" href ="venus.htm" alt="Venus" />
</map>
Here is my window form code to get the mouse location of the click
'This code keeps the form from being moved, which will change the location of the mouse click
Protected Overloads Overrides Sub WndProc(ByRef m As Message)
Const WM_NCLBUTTONDOWN As Integer = 161
Const WM_SYSCOMMAND As Integer = 274
Const HTCAPTION As Integer = 2
Const SC_MOVE As Integer = 61456
If (m.Msg = WM_SYSCOMMAND) AndAlso (m.WParam.ToInt32() = SC_MOVE) Then
Exit Sub
End If
If (m.Msg = WM_NCLBUTTONDOWN) AndAlso (m.WParam.ToInt32() = HTCAPTION) Then
Exit Sub
End If
MyBase.WndProc(m)
End Sub
Private Sub PictureBox1_MouseClick(ByV
x = System.Windows.Forms.Contr
y = System.Windows.Forms.Contr
MessageBox.Show("You clicked x cor: " & x & " You Clicked y cord: " & y)
End Sub
You can create a GraphicsPath() instance that represents each "hot spot" on your image:
http://msdn.microsoft.com/en-us/library/system.drawing.drawing2d.graphicspath(VS.71).aspx
Next, create a Region() from those GraphicsPath() instances:
http://msdn.microsoft.com/en-us/library/system.drawing.region.aspx
Finally, you can use the Region.IsVisible() function to determine if the cursor is contained by one of the hot spots:
http://msdn.microsoft.com/en-us/library/dz11htdf.aspx
http://msdn.microsoft.com/en-us/library/system.drawing.drawing2d.graphicspath(VS.71).aspx
Next, create a Region() from those GraphicsPath() instances:
http://msdn.microsoft.com/en-us/library/system.drawing.region.aspx
Finally, you can use the Region.IsVisible() function to determine if the cursor is contained by one of the hot spots:
http://msdn.microsoft.com/en-us/library/dz11htdf.aspx
ASKER
ged225, i tried using panels, but when i set the background to transparent it still covers the image and if i set its z axis to behind the images, none of the panel's events fire. I will have to try idle_minds.
ASKER
Not sure the regions will work either, how to i mouse event hander?
ASKER CERTIFIED SOLUTION
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Then each region has it's own event, which makes your code a lot easier to manage.
What's the "end game"? (EG: what are you doign with the regions? What happens on the clicks, etc)