protected override bool OnButtonReleaseEvent(Gdk.EventButton ev)
{
base.OnButtonReleaseEvent(ev);
if (ev.Button == 1 && plots.Count > 0)
{
// User wants to zoom
if (selection_started &&
sel_rect.Width >= 10 &&
sel_rect.Height >= 10)
{
IAxis x_axis, y_axis;
GetXAndYAxes(out x_axis, out y_axis);
int x_min = Int32.MaxValue;
int x_max = Int32.MinValue;
int y_min = Int32.MaxValue;
int y_max = Int32.MinValue;
// translate sel_rect into grid coordinates
if (x_axis != null)
{
int x1 = sel_rect.X - plot_alloc.X;
int x2 = x1 + sel_rect.Width;
x_min = Convert.ToInt32((x1 / (double)plot_alloc.Width) * GRID_MAX);
x_max = Convert.ToInt32((x2 / (double)plot_alloc.Width) * GRID_MAX);
RemoveAxisListeners(y_axis);
x_axis.Zoom(x_min, x_max);
AddAxisListeners(y_axis);
}
if (y_axis != null)
{
int y1 = sel_rect.Y - plot_alloc.Y;
int y2 = y1 + sel_rect.Height;
y_min = Convert.ToInt32(-1 * GRID_MAX * ((y2 - plot_alloc.Height) / (double)plot_alloc.Height));
y_max = Convert.ToInt32(-1 * GRID_MAX * ((y1 - plot_alloc.Height) / (double)plot_alloc.Height));
RemoveAxisListeners(y_axis);
y_axis.Zoom(y_min, y_max);
AddAxisListeners(y_axis);
}
// now, do it for the rest of the axes
foreach (IAxis axis in axes)
{
if (axis == x_axis || axis == y_axis)
{
continue;
}
if (axis.Dimension == 0)
{
axis.Zoom(x_min, x_max);
}
else if (axis.Dimension == 1)
{
axis.Zoom(y_min, y_max);
}
}
sel_rect = new Gdk.Rectangle();
selection_started = false;
QueueResize();
return(true);
}
sel_rect = new Gdk.Rectangle();
selection_started = false;
// convert the clicked point to graph locations
int x = ((int)ev.X - plot_alloc.X);
int y = ((int)ev.Y - plot_alloc.Y);
if ((x < 0 || x > plot_alloc.Width) ||
(y < 0 || y > plot_alloc.Height))
{
return(true);
}
foreach (IPlot plot in plots)
{
plot.UnselectAll();
if (plot.CanFocus)
{
plot.ReleaseFocus();
}
}
for (int i = 0; i < plots.Count; i++)
{
IPlot plot = (IPlot)plots[i];
focused_plot_index = i;
if ((ev.State & Gdk.ModifierType.ControlMask)
== Gdk.ModifierType.ControlMask)
{
if (plot.UnselectPoint(x, y))
{
break;
}
continue;
}
if (plot.SelectPoint(x, y))
{
break;
}
}
QueueDraw();
}
return(true);
}