public void ExpandProperty(PropertyEnumerator propEnum, bool expand)
{
if (propEnum == propEnum.RightBound)
return;
Property property = propEnum.Property;
// Do nothing if the expand state won't change
if (expand == property.Expanded)
return;
InvalidateVisibleItemCount();
// Hide the inplace control if it is a child of the closed category
if (property.Expanded && !expand)
{
if (SelectedPropertyEnumerator.IsDescendantOf(propEnum))
SelectProperty(propEnum);
if (FirstDisplayedProperty.IsDescendantOf(propEnum))
FirstDisplayedProperty = propEnum.GetVisibleDeepEnumerator();
}
property.ExpandedInternal = expand;
_parentCtrl.OnPropertyExpanded(new PropertyExpandedEventArgs(propEnum, expand));
if (IsHandleCreated)
{
// We call OnSizeChanged here because this method checks to see if there
// is some space left at the bottom of the grid and scrolls it accordingly.
// It also calls CheckScrollbar()
Rectangle rect = ClientRectangle;
OnSizeChanged(rect.Width, rect.Height);
Invalidate();
}
}
public bool EnsureVisible(PropertyEnumerator propEnum)
{
if (propEnum == propEnum.RightBound)
return false;
if (_displayMode == PropertyGrid.DisplayModes.Categorized)
{
// Ensure that all ancestors are expanded and visible
PropertyEnumerator parentEnum = propEnum;
while(parentEnum.HasParent)
{
parentEnum = parentEnum.Parent;
if (parentEnum.Property.Expanded == false)
{
ShowProperty(parentEnum, true);
ExpandProperty(parentEnum, true);
}
}
}
Rectangle itemRect = GetAbsoluteItemRect(propEnum);
Rectangle clientRect = ClientRectangle;
// Make the item the first visible one at the top if it is above the control
if (itemRect.Top < clientRect.Top)
{
_firstDisplayedLine = 1;
FirstDisplayedProperty = propEnum.GetVisibleDeepEnumerator();
}
// Make the item the last visible one at the bottom if it is below the control
else
{
while(itemRect.Bottom > clientRect.Bottom)
{
Win32Calls.SendMessage(Handle, Win32Calls.WM_VSCROLL, Win32Calls.MakeLong(Win32Calls.SB_LINEDOWN, 0), 0);
itemRect = GetAbsoluteItemRect(propEnum);
}
Win32Calls.SendMessage(Handle, Win32Calls.WM_VSCROLL, Win32Calls.MakeLong(Win32Calls.SB_ENDSCROLL, 0), 0);
}
// We call OnSizeChanged here because this method checks to see if there
// is some space left at the bottom of the grid and scrolls it accordingly.
// It also calls CheckScrollbar()
OnSizeChanged(clientRect.Width, clientRect.Height);
Refresh();
return true;
}
private void SelectProperty(PropertyEnumerator enumerator, Point mousePos)
{
if ((enumerator.Property != null) && (CheckPropertyVisibility(enumerator) == false))
throw new ArgumentException("The property enumerator passed to SelectProperty must point to a visible property.", "enumerator");
// Clear multi selected items
bool multiSelectionCleared = false;
if (!_clickWithControl && (_multiSelectedItems.Count > 0))
{
foreach(PropertyVisibleDeepEnumerator currentEnum in _multiSelectedItems)
{
if (currentEnum != _selectedPropertyEnum)
currentEnum.Property.SelectedInternal = false;
}
_multiSelectedItems.Clear();
multiSelectionCleared = true;
}
bool selectedPropertyChanged = ((_selectedPropertyEnum != enumerator) || multiSelectionCleared);
PropertyEnumerator previousSelectedPropertyEnum = _selectedPropertyEnum;
if ((enumerator != enumerator.RightBound) && (enumerator.RightBound != null))
{
if (selectedPropertyChanged)
{
if (_selectedPropertyEnum != _selectedPropertyEnum.RightBound)
_selectedPropertyEnum.Property.SelectedInternal = false;
_selectedPropertyEnum = enumerator.GetVisibleDeepEnumerator();
if (IsHandleCreated)
{
Rectangle clientRect = ClientRectangle;
Rectangle rect = GetItemRect(enumerator);
// Show the inplace control, even if partially visible
if ((rect.Top < clientRect.Bottom) && (rect.Bottom > clientRect.Top))
ShowInPlaceControl(enumerator, mousePos);
}
if (selectedPropertyChanged)
_selectedPropertyEnum.Property.SelectedInternal = true;
}
else
{
// If the selected property didn't change we must still ensure that the text will be selected
// if the navigation mode says so
if ((_parentCtrl.NavigationKeyMode == PropertyGrid.NavigationKeyModes.TabKey) &&
((_parentCtrl.TabKeyNavigationMode & PropertyGrid.TabKeyNavigationModes.TabKeyWithAutoFocus) != 0))
{
if (_currentInPlaceControl != null)
{
if (!_currentInPlaceControl.ContainsFocus)
FocusTextBox();
SelectAllText();
}
}
}
}
else if (selectedPropertyChanged) // No item selected
{
if (IsHandleCreated)
{
// We hide the in-place control
HideInPlaceControl();
}
if (_selectedPropertyEnum.Property != null)
_selectedPropertyEnum.Property.SelectedInternal = false;
_selectedPropertyEnum = enumerator.GetVisibleDeepEnumerator();
}
if (selectedPropertyChanged)
{
if (IsHandleCreated)
{
if (_parentCtrl.CommentsVisibility)
_parentCtrl.Refresh();
else
Refresh();
}
// Notify the derived class
if (_selectedPropertyEnum != RightBound)
_parentCtrl.OnPropertySelected(new PropertySelectedEventArgs(_selectedPropertyEnum,
previousSelectedPropertyEnum));
}
}
