// Zoom in or out (ie. change the visible time span): give a scale < 1.0
// and it zooms in, > 1.0 and it zooms out.
public void Zoom(double scale)
{
if (scale <= 0.0)
{
return;
}
grid.BeginDraw();
if (VisibleTimeSpan.Scale(scale) > TotalTime)
{
var t = TimeSpan.FromTicks(TotalTime.Ticks / grid.Width);
if (t.Ticks > 2000)
{
TimePerPixel = t;
VisibleTimeStart = TimeSpan.Zero;
}
}
else
{
var t = TimePerPixel.Scale(scale);
if (t.Ticks > 2000)
{
TimePerPixel = t;
if (VisibleTimeEnd >= TotalTime)
{
VisibleTimeStart = TotalTime - VisibleTimeSpan;
}
}
}
grid.EndDraw();
}
protected override void OnMouseHWheel(MouseEventArgs args)
{
//Debug.WriteLine("Grid OnMouseHWheel: delta={0}", args.Delta);
double scale;
if (args.Delta > 0)
{
scale = 0.10;
}
else
{
scale = -0.10;
}
VisibleTimeStart += VisibleTimeSpan.Scale(scale);
}
protected override void OnMouseWheel(MouseEventArgs e)
{
base.OnMouseWheel(e);
if (ModifierKeys.HasFlag(Keys.Control) & ModifierKeys.HasFlag(Keys.Alt))
{
//holding the control and alt keys while scrolling adjusts the row height under the cursor.
Point gridLocation = e.Location;
int delta = e.Delta;
zoomRowHeight(gridLocation, delta);
}
else if (ModifierKeys.HasFlag(Keys.Control) & ModifierKeys.HasFlag(Keys.Shift))
{
//holding the control and shift while scrolling adjusts all row heights
double zoomScale = e.Delta < 0.0 ? 0.8 : 1.25;
ZoomRows(zoomScale);
}
else if (ModifierKeys.HasFlag(Keys.Control))
{
// holding the control key zooms the horizontal axis, by 10% per mouse wheel tick
if (ZoomToMousePosition)
{
// holding the control key zooms the horizontal axis under the cursor, by 10% per mouse wheel tick
ZoomTime(1.0 - ((double)e.Delta / 1200.0), e.Location);
// waveform.Invalidate();
}
else
{
// holding the control key zooms the horizontal axis, by 10% per mouse wheel tick
Zoom(1.0 - ((double)e.Delta / 1200.0));
}
}
else if (ModifierKeys.HasFlag(Keys.Shift))
{
// holding the skift key moves the horizontal axis, by 10% of the visible time span per mouse wheel tick
// wheel towards user --> negative delta --> VisibleTimeStart increases
// wheel away from user --> positive delta --> VisibleTimeStart decreases
VisibleTimeStart += VisibleTimeSpan.Scale(-((double)e.Delta / 1200.0));
// waveform.Invalidate();
}
else
{
// moving the mouse wheel with no modifiers moves the display vertically, 40 pixels per mouse wheel tick
VerticalOffset += -(e.Delta / 3);
}
}
protected override void OnPlaybackCurrentTimeChanged(object sender, EventArgs e)
{
// check if the playback cursor position would be over 90% of the grid width: if so, scroll the grid so it would be at 10%
if (PlaybackCurrentTime.HasValue)
{
if (PlaybackCurrentTime.Value > VisibleTimeStart + VisibleTimeSpan.Scale(0.9))
{
VisibleTimeStart = PlaybackCurrentTime.Value - VisibleTimeSpan.Scale(0.1);
}
if (PlaybackCurrentTime.Value < VisibleTimeStart)
{
VisibleTimeStart = PlaybackCurrentTime.Value - VisibleTimeSpan.Scale(0.1);
}
}
base.OnPlaybackCurrentTimeChanged(sender, e);
}
protected override void OnMouseWheel(MouseEventArgs e)
{
base.OnMouseWheel(e);
if (Form.ModifierKeys.HasFlag(Keys.Control))
{
// holding the control key zooms the horizontal axis, by 10% per mouse wheel tick
Zoom(1.0 - ((double)e.Delta / 1200.0));
}
else if (Form.ModifierKeys.HasFlag(Keys.Shift))
{
// holding the skift key moves the horizontal axis, by 10% of the visible time span per mouse wheel tick
// wheel towards user --> negative delta --> VisibleTimeStart increases
// wheel away from user --> positive delta --> VisibleTimeStart decreases
VisibleTimeStart += VisibleTimeSpan.Scale(-((double)e.Delta / 1200.0));
}
else
{
// moving the mouse wheel with no modifiers moves the display vertically, 40 pixels per mouse wheel tick
VerticalOffset += -(e.Delta / 3);
}
}
// Zoom in or out (ie. change the visible time span): give a scale < 1.0
// and it zooms in, > 1.0 and it zooms out.
public void Zoom(double scale)
{
if (scale <= 0.0)
{
return;
}
if (VisibleTimeSpan.Scale(scale) > TotalTime)
{
TimePerPixel = TimeSpan.FromTicks(TotalTime.Ticks / grid.Width);
VisibleTimeStart = TimeSpan.Zero;
}
else
{
TimePerPixel = TimePerPixel.Scale(scale);
if (VisibleTimeEnd > TotalTime)
{
VisibleTimeStart = TotalTime - VisibleTimeSpan;
}
}
}
// Zoom in or out (ie. change the visible time span): give a scale < 1.0
// and it zooms in, > 1.0 and it zooms out.
public void Zoom(double scale)
{
if (scale <= 0.0)
{
return;
}
grid.BeginDraw();
if (VisibleTimeSpan.Scale(scale) > TotalTime)
{
TimePerPixel = TimeSpan.FromTicks(TotalTime.Ticks / grid.Width);
VisibleTimeStart = TimeSpan.Zero;
}
else
{
TimePerPixel = TimePerPixel.Scale(scale);
if (VisibleTimeEnd > TotalTime)
{
VisibleTimeStart = TotalTime - VisibleTimeSpan;
}
}
grid.EndDraw();
grid.ResetAllElements();
}
