public override void SendKey(KeyInfo key_info)
{
bool already_handled = false;
// try the B/W toggle key (F12)
if (key_info.SpecialKey == SpecialKey.F12)
{
this.Application.BlackAndWhite = !this.Application.BlackAndWhite;
this.Invalidate();
this.Controls.InvalidateAll();
this.Application.Terminal.ResetBuffer();
already_handled = true;
}
// try the repaintall key (F10)
if (key_info.SpecialKey == SpecialKey.F10)
{
this.Invalidate();
this.Controls.InvalidateAll();
this.Application.Terminal.ResetBuffer();
already_handled = true;
}
// try next field key (TAB)
if (key_info.SpecialKey == SpecialKey.Tab)
{
FocusedControl.SelectNextControl(FocusedControl, forward: true, tabStopOnly: true);
already_handled = true;
}
// try form accept key (ENTER)
if (already_handled == false)
{
if (key_info.SpecialKey == SpecialKey.Enter)
{
if (this.AcceptButton != null)
{
if (this.AcceptButton.Enabled)
{
if (!(this.FocusedControl is Button))
{
this.AcceptButton.OnClick(EventArgs.Empty);
already_handled = true;
}
}
}
}
}
// try form cancel key (ESC)
if (already_handled == false)
{
if (key_info.SpecialKey == SpecialKey.F4)
{
if (this.CancelButton != null)
{
if (this.CancelButton.Enabled)
{
this.CancelButton.OnClick(EventArgs.Empty);
}
already_handled = true;
}
}
}
// try the registered shortcuts for any control
if (already_handled == false)
{
var _controls = Controls.TabIndexList;
var node = _controls.First;
while (node != null)
{
var c = node.Value;
if (c.Visible && c.Enabled && c.HasShortCut && key_info.KeyChar == c.ClickShortCut)
{
c.OnClick(EventArgs.Empty);
already_handled = true;
break;
}
node = node.Next;
}
}
// try the key preview for the form
if (already_handled == false)
{
if (this.KeyPreview == true || this.Focused)
{
var e = new KeyPressEventArgs(key_info);
OnKeyPress(e);
already_handled = e.Handled;
}
}
// otherwise send to the focused control for further management
if (already_handled == false)
{
if (_focusedControl != null)
{
_focusedControl.SendKey(key_info);
}
}
}
private void _performKeyPress(KeyInfo key)
{
if (Enabled == false)
{
return;
}
switch (key.SpecialKey)
{
case SpecialKey.Home:
{
SelectionStart = 0;
break;
}
case SpecialKey.End:
{
SelectionStart = Text.Length; //TODO: works??
break;
}
case SpecialKey.LeftArrow:
{
SelectionStart -= 1;
break;
}
case SpecialKey.RightArrow:
{
SelectionStart += 1;
break;
}
case SpecialKey.UpArrow:
{
if (this.Height == 1)
{
SelectionStart -= 1;
}
break;
}
case SpecialKey.DownArrow:
{
if (this.Height == 1)
{
SelectionStart += 1;
}
break;
}
case SpecialKey.Delete:
{
_deleteCurrentChar();
Invalidate();
break;
}
case SpecialKey.Backspace:
{
if (_selectionStart > 0)
{
SelectionStart -= 1;
_deleteCurrentChar();
Invalidate();
}
break;
}
case SpecialKey.Enter:
{
break;
}
default:
{
if (this.ReadOnly == false)
{
if (this.Overwrite == false)
{
OverwriteText(key.KeyChar);
}
else
{
// Paste(key.KeyChar)
OverwriteText(key.KeyChar);
}
Invalidate();
SelectionStart += 1;
}
break;
}
}
}
public static Message WM_KEY(KeyInfo key_info) => new Message(WM_MessageType.WM_KEY, key_info);
public KeyPressEventArgs(KeyInfo info)
{
KeyInfo = info;
}
public void SendKey(KeyInfo key_info)
{
MessageQueue.PostMessage(Message.WM_KEY(key_info));
}
