Im currently writing a program to control a Velleman k8055 usb interface, i started by assigning keyDown and Keysup to control outputs. this worked fine, now ive added buttons to control the same outputs with MouseDown and Mouseup. however when i start to debug, the mouseup and mousedown works fine, but not the keys? is there a special code to use them with one another.
Heres some of the codes for each..
Private Sub Button1_KeyUp(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Button1.KeyUp
If e.KeyCode = Keys.I Then
ClearDigitalChannel(1)
i have a datagridview in which i want to know which row is selected by mousedown or keydown.. so in both case i want to use only ONE subroutine which can give e.rowindex , e.colindex value of datagridview...
Example..
Private Sub xyz (s as sender, e as keydownaurguments, m as mousedownaurguments) handles keydown, mousedown '\\ code end sub
how to view and populate a listview with a text file. Now I come seeking wisdom on how do create an effect based upon the location where a mousedown event occured.
Here is my example. (I like to give simple examples because it helps me learn rather than be given the answer and learn nothing).
I am working in vb.net, in a windows form. I have a map of Western Europe called picturebox1.
I want another form to pop up when a user clicks on a section of picturebox1. For example: I want a "Germany" form to pop up when the user clicks on Germany. And such for if France, Spain, Italy, Austria, England, Scotland, etc...based on the location of the mousedown event.
Historically, when working with a picturebox with sections that were rectangle, I would do little screenshots and overlay them over the picturebox and use that as a cheat.
The challenge here is that the countries are polygons and now I need to learn this for real. I am looking for a little direction on where to go to learn about a mousedown event that causes an effect based upon the location of the mousedown event.
This can be a challenge because each country is of different x, y location coordinates so I image I need to create an elaborate if or case statement to capture and evalute. However, I don't know how to acquire the coordinates of a mousedown.
Is it possible to set focus on the keydown event so after the button control, sets the focus into the keydown? although says often control can have focus,.Putting a button and a keydown event on a form...
I currently have a form that uses Form1_MouseDown and Form1_MouseDoubleClick However, MouseDown is taking presidence over the doubleclick. How can i check to see if the user is doing a doubleclick and fire that event and not the single left click?
In vb6 when you wanted to alter the effect of a mouse click, you could use the mouse down event and alternate the action depending on the value of the shift, control and alternate key. (and also detecting if the right or left mouse button was clicked)
When trying these in my project, I couldn't find the right codes to do this. I can't imagine this feature isn't available so I'm sure I am just messing up somehow.
Another little problem.I have a form with a control (Picturebox or perhaps flash) which uses graphic hotspots instead of controls with handles so when the control receives a mouseclick, it does different things depending on the coordinates of the click.I can obtain the handle for the main control and can see where the hotspots are as they look like buttons and set a point to that location.How can I send a mouseclick (WM_Mousedown?) to the precise point on the control?If I'm not mistaken, using Sendmessage with BM_Click would tell the control it was clicked but without coordinates.I'm trying to do this using Visual Basic from Visual Studio 2008
Is it possible to handle a mouseDown event in VB.Net (2008) regardless of the control firing the mouseDown event? Basically, I just want to catch a mouseDown event at the "form level" and don't want to program mouseDown event handlers in every control. Is there a way to do this?
During a MouseDown event, I issue a DoDragDrop. In the subsequent DragDrop event, I call a DLL to update a Ms-Access database. The SQL is in error so there is an exception. I can catch the exception in the DLL but not in the MouseDown event. Stangely without any try block, stepping over the ExecuteNonQuery() returns me to the line next to the DoDragDrop without the debugger stopping on the exception. In release mode, the exception is completely ignored. There are posts talking about event being "indirect" but I dont understand.
When a MouseDown event occurs on a System.Windows.Forms.DataGridView I'm performing some action. But now I only want to perform said action if the MouseDown event occurs on any part of the Grid EXCEPT for the Headers (row or column).
i am trying to create an application like a media player....Say i got an option which changes the background image of the form,like skin or something!now i want to change the mouse events when that background image is active on the form... lemme give u an example of a code...
Private Sub FireToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles FireToolStripMenuItem.Click Me.BackgroundImage = My.Resources.Fire TrackBar1.BackColor = Color.Yellow End Sub
Dim img As New Windows.Forms.PictureBox img.Location = New System.Drawing.Point(newx, newy) img.BackgroundImageLayout = ImageLayout.Zoom img.Size = New System.Drawing.Size(100, 100) img.Name = "img" & t
I need a mousedown function to cover all the images that are produced by the above code.The following code only affects the areas that aren't covered by the images. I just need something that covers the whole form
Private Sub main_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyClass.MouseDown MsgBox(Me.GetChildAtPoint(e.Location)) End Sub
I want to implement basic finger gestures within one of my apps, but have got stuck at the first hurdle. There are a few examples on the net, but they seem to use custom controls that do not allow easy use of other controls. I really just need a way to capture the MouseDown/Up methods even through a child control, still allowing clicks to be captured by whatever control has been clicked.
is it possible to draw an accurate circle in vb.net with mouseDown and mouseUp boundaries? I only manage to create circle-settings with rectangular boundaries using DrawEllipse. I've tried to work around it using pythagoras but it just doesn't work and I'm pretty sure I've got my maths right...
Is it possible to define a circle with DrawEllipse(pencil,x1,y1,width,length) ?
in a winform, in vb net,I have a list view with hoverselection set to true. I start a drag and drop operation when the mousedown event is fired, but it's fired only when i release the mouse button on the control or on the dropped control! is it a normal behavior?
I'm working with a project that is WPF and VB.net. I want to visually simulate "dragging" an object (though I do not want to use standard drag and drop for reason of purpose).Basically, I have a label object that, on its MouseDown event, I want it to follow the mouse cursor inside a 640x480 solid-size grid (but not outside of it!). Mind you, this grid is centered inside a full-screen window. Again, the object should not follow the mouse outside of the grid (I'm guessing a "ClipToBounds = True" here)Then, on the label's MouseUp event, I want it to either stay in its current position or return to its original position, as determined by the value of a boolean variable set by another object's MouseEnter property.Note, if it would be easier to work with, I can change the grid to a canvas in a cinch. I'm guessing that would be desirable.
How do I make the object (label) follow the mouse cursor inside the grid/canvas, but not outside of it? This needs to happen on the MouseDown event of the label.How do I make the object "stick" in its current position? (From this, I can probably figure out how to make it return to its original position on my own.
I need to draw several line-graphics on a form, then select and drag individual graphics to new locations. Is it possible for example to give each graphic path an identity when drawn, then select any one (via mousedown, whatever) and link it to the dragged mouse co-ordinates until released? MS Visio has exactly this ability - can it be done in .NET?
Private Sub LMouseDown(ByVal sender As Object, ByVal e As MouseEventArgs) Handles MyBase.MouseDown
If allowMouseCoordinate = False Then Exit Sub Dim xPos As Integer Dim yPos As Integer If e.Button = MouseButtons.Left Then
[Code]...
But this only works if I press on form. But I have a tile based map covering the entire screen.How can I make it so, that It would check if I clicked on a picture box (or simply anything)?
Basically, for my first VB project, I am creating a virtual keyboard where a sound is played from the resources on KeyDown. So far, the program seems to work except for the fact that each key needs to be clicked by the mouse before the sound is played by pressing each key (hence put the object in focus), where I need the key to play the sound without clicking the keyboard key (put the object in focus on KeyDown). Below is an example of my code:
Private Sub C_KeyDown(ByVal sender As System.Object, ByVal e As PreviewKeyDownEventArgs) Handles C.PreviewKeyDown ' C is the label attached to the first 'Rectangle' (Key) If (e.KeyCode = Keys.A) Then 'The A key should activate the C key on the keyboard
[code]....
I have KeyPreview set to 'True' under the form's properties.
Private Sub TxtLname_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TxtLname.KeyDown If e.KeyCode = Keys.Enter Then If IsNumeric(TxtLname.Text) Then[code]....
when I replace the keys.enter with "keys.tab" it won't work..
Private Sub TxtLname_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TxtLname.KeyDown If e.KeyCode = Keys.tab Then If IsNumeric(TxtLname.Text) Then[code].....
I'm building a slot machine, and I'm having some trouble.re's the
'Pulls down the slot If e.KeyCode = Keys.Space Then PictureBox2.Focus()
[code]....
When I debug and click space down, my picture box of the knob slides on down to 175, pauses, and shoots back up. The problem I'm running into, is that it doesn't do anything if I try to pull the knob down again. It doesn't bug out or anything, but it just doesn't do it again
my child form is a game that allows user to move using keydown event (arrow key left and right). But when i import it to MDI, keydown event doesn't work anymore. Am i missing something here?
how to use the keydown event soif you press 'A' a messagebox will popup saying you pressed A else it will say This function is not reconised i am hoping to use this knowlage to start a game so that if you press W the image will go up.
Is it possible to use the KeyDown on a picturebox?What I want is that when somebody presses the SPACEBAR the cursor has to change in the Hand-icon...and additionally do some operations when moving over the picturebox. I fact...when spacebar hasn't been pressed you can just move around the picturebox, without anything happening...with the spacebar pressed the cursor should change and you should be able to scroll the image using the mouse moving.
what I have is :
'in my global sub that loads everything, not the Main.Load, because he has to check some stuff in advance AddHandler ACO_graph.PreviewKeyDown, AddressOf Me.ACO_graph_PreviewKeyDown AddHandler ACO_graph.KeyDown, AddressOf Me.ACO_graph_KeyDown
Private Sub Form1_KeyDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles MyBase.KeyDown If e.Control Then MessageBox.Show("aaaa") End If End Sub
As you can see, my form will check for when the control key is pressed down.But it doesn't work. Why?
I am trying to call the form_Keydown method from a procedure, CharacterJump()
Here is my
Keydown frmGame_KeyDown(Nothing, New KeyEventArgs(Keys.Right))
What I am trying to do is after the user moves the character with the right arrow key and presses the up button to jump while still holding the right arrow key, the character will continue on moving, but the code that I put only does one movement and does not keep going.
Edit: I think I know the reason why it is only doing it once; it is because the keydown procedure is being called and therefore only executed once. The question is, how do I make it so it goes to keydown and doesn't return?
