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VB Forum / General 2 / January 2004how to determine mouse position
Hi all, I have seen a lot of code on this but nothing that I really understood. I have a form with a picturebox. In this picturebox I have an image that displays a map. What I want to do is have a textbox on the bottom of the screen that displays the cursor position when I move the mouse over the screen. I need to be able to translate these X and Y to latitude and longitude. I know it has to do with scalemode and getcursorposition etc... Please some sample code Regards Marco The Netherlands >Hi all, > [quoted text clipped - 8 lines] > >Please some sample code Assuming that your image is in Image1.. Private Sub Image1_MouseMove(Button As Integer, Shift As Integer, _ X As Single, Y As Single) 'this will likely be twips, unless you've changed the scalemode. Me.Caption = X & ":" & Y & " in inches: " ' here is how to convert it to more human friendly stuff. ' Hit F1 for the other scalex and scaley contants. Me.Caption = Me.Caption & ScaleX(X, ScaleMode, vbInches) & ":" Me.Caption = Me.Caption & ScaleY(Y, ScaleMode, vbInches) End Sub  SignatureRegards, Frank Look at the X and Y coordinates of the MouseMove, MouseDown, MouseUp events of the picturebox. They'll give you the X and Y positions of the mouse pointer in whichever scale of the picturebox's ScaleMode. Then you'd have to devise a formula to convert these values into logitude/latitude depending on the image. > Hi all, > [quoted text clipped - 12 lines] > Marco > The Netherlands LonLeft = -180 LonRight = 180 LatTop = 90 LatBottom = -90 picMap.Scale (LonLeft, LatTop)-(LonRight, LatBottom) > Hi all, > [quoted text clipped - 12 lines] > Marco > The Netherlands BTW Sign of X and Y will tell you if your East/West Lon and North/South Lat > LonLeft = -180 > [quoted text clipped - 22 lines] > > Marco > > The Netherlands Greg, tnx for this but could you be more specific on how to use this. I put this code in the Form load event but how does it work with scale of the map. How does VB know where he is on the world in relation to lat/long. Do I have to set the scaleheight, scaleleft, scalebottom etc? Regards, Marco > BTW > [quoted text clipped - 26 lines] > > > Marco > > > The Netherlands <<Do I have to set the scaleheight, scaleleft, scalebottom etc?>> VB does it all for you. By changing the Scale you have changed the ScaleMode to User. ScaleHeight becomes LatTop-LatBottom or 180, ScaleWidth becomes LonRight-LonLeft or 360 Go to: http://members.cox.net/avnav/ and look at my system. You can download and try. It's free. Look at the map part of the system. If you are an airplane pilot it will be more fun. Greg > Greg, > [quoted text clipped - 39 lines] > > > > Marco > > > > The Netherlands |
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