Rank: Advanced Member
Groups: Member
Joined: 9/10/2010(UTC)
Posts: 57
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Question: what is the best way to edit a selected object on multilayerviewer by key event? E.G: we want to use alt-key and arrow-key to move a selected object by one unit ( eg one point) on multilayerviewer. We tried to use KeyDown event of multilayerviewer to do this. It does detect alt-key but no arrow-key. What it the good way to do this?
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Rank: Advanced Member
Groups: Member
Joined: 1/31/2005(UTC)
Posts: 458
Was thanked: 5 time(s) in 5 post(s)
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Hello mzhao, The simplest way to move object is to translate object's transformation matrix. As for arrow keys - it seems that it is a little bit tricky part. After some googling I finally make it work by overloading ProcessCmdKey() method of the control. Here is sample code: Code:class MyMLV : MultiLayerViewer
{
public MyMLV()
{
}
protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
{
const int WM_KEYDOWN = 0x100;
const int WM_SYSKEYDOWN = 0x104;
if ((msg.Msg == WM_KEYDOWN) || (msg.Msg == WM_SYSKEYDOWN))
{
switch (keyData)
{
case Keys.Down:
MessageBox.Show("Down Arrow Captured");
break;
case Keys.Up:
MessageBox.Show("Up Arrow Captured");
break;
}
}
return true;
}
}
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