private int GetMinimumPanelsHeight([CanBeNull] ExpanderControl expandingPanel)
{
var minHeight = 0;
foreach (ExpanderControl panel in _panels)
{
if (panel.Collapsed && panel != expandingPanel)
{
minHeight = minHeight + panel.CollapsedHeight;
}
else
{
// panel is expanded, or is about to be expanded
if (panel.Dock == DockStyle.Fill)
{
minHeight = minHeight + panel.CollapsedHeight +
panel.Content.MinimumSize.Height;
}
else
{
minHeight = minHeight + panel.ExpandedHeight;
}
}
}
return(minHeight);
}
private int GetMaximumPanelsHeight([CanBeNull] ExpanderControl expandingPanel)
{
var maxHeight = 0;
foreach (ExpanderControl panel in _panels)
{
if (panel.Collapsed && panel != expandingPanel)
{
maxHeight = maxHeight + panel.CollapsedHeight;
}
else
{
// panel is expanded, or is a about to be expanded
if (panel.Dock == DockStyle.Fill)
{
maxHeight = 2000;
break;
}
maxHeight = maxHeight + panel.ExpandedHeight;
}
}
return(maxHeight);
}
private void CollapsedPanel([NotNull] ExpanderControl collapsedPanel)
{
Assert.ArgumentNotNull(collapsedPanel, nameof(collapsedPanel));
int heightReduction = collapsedPanel.ExpandedHeight -
collapsedPanel.CollapsedHeight;
int newHeight = Height - heightReduction;
MinimumSize = new Size(MinimumSize.Width,
GetMinimumPanelsHeight(null));
MaximumSize = new Size(GetMaximumWidth(),
GetMaximumPanelsHeight(null));
Height = newHeight;
}
private void ExpandingPanel([NotNull] ExpanderControl expandingPanel)
{
Assert.ArgumentNotNull(expandingPanel, nameof(expandingPanel));
int heightIncrease = expandingPanel.ExpandedHeight -
expandingPanel.CollapsedHeight;
int newHeight = Height + heightIncrease;
MinimumSize = new Size(MinimumSize.Width,
GetMinimumPanelsHeight(expandingPanel));
MaximumSize = new Size(GetMaximumWidth(),
GetMaximumPanelsHeight(expandingPanel));
Height = newHeight;
}
public ExpanderControl AddPanel([NotNull] Control control, bool fill)
{
Assert.ArgumentNotNull(control, nameof(control));
var panel = new ExpanderControl
{
PanelHeight = control.Height,
Content = control,
Dock = fill
? DockStyle.Fill
: DockStyle.Bottom
};
_panels.Add(panel);
SetMinimumSize();
panel.CollapsedChanged += panel_CollapsedChanged;
panel.CollapsedChanging += panel_CollapsedChanging;
return(panel);
}