/// <summary>
/// Draws the content of a <see cref="T:System.Windows.Media.DrawingContext" /> object during the render pass of a <see cref="T:System.Windows.Controls.Panel" /> element.
/// </summary>
/// <param name="dc">The <see cref="T:System.Windows.Media.DrawingContext" /> object to draw.</param>
protected override void OnRender(DrawingContext dc)
{
base.OnRender(dc);
if (!ShowGroupHeaders || GroupHeaderRenderer == null)
{
return;
}
var offsetTop = 0d;
if (_scrollVertical.Visibility == Visibility.Visible)
{
offsetTop = _scrollVertical.Value * -1;
}
var currentTop = offsetTop + Padding.Top;
var currentGroupIsExpanded = true;
foreach (var control in _lastControls)
{
var lineHeight = 0d;
if (control.Label != null)
{
lineHeight = control.Label.DesiredSize.Height;
}
if (control.Edit != null)
{
lineHeight = Math.Max(lineHeight, control.Edit.DesiredSize.Height);
}
lineHeight = SnapToPixel(lineHeight);
if (control.Label != null && SimpleView.GetGroupBreak(control.Label))
{
var groupTitle = SimpleView.GetGroupTitle(control.Label);
if (_renderedGroups.ContainsKey(groupTitle))
{
currentGroupIsExpanded = _renderedGroups[groupTitle].IsExpanded;
var group = _renderedGroups[groupTitle];
var width = ActualWidth - Padding.Left - Padding.Right;
if (_scrollVertical.Visibility == Visibility.Visible)
{
width -= SystemParameters.VerticalScrollBarWidth;
}
dc.PushTransform(new TranslateTransform(Padding.Left, currentTop));
GroupHeaderRenderer.RenderHeader(dc, currentTop, width, groupTitle, group.IsExpanded);
dc.Pop();
group.LastRenderTopPosition = currentTop;
currentTop += _renderedGroups[groupTitle].Height;
}
}
if (currentGroupIsExpanded)
{
currentTop += lineHeight + VerticalElementSpacing;
}
}
}
/// <summary>
/// Invoked when an unhandled MouseDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.
/// </summary>
/// <param name="e">The <see cref="T:System.Windows.Input.MouseButtonEventArgs" /> that contains the event data. This event data reports details about the mouse button that was pressed and the handled state.</param>
protected override void OnMouseDown(MouseButtonEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed && e.ClickCount == 1)
{
foreach (var control in _lastControls)
{
if (control.Label != null && SimpleView.GetGroupBreak(control.Label))
{
var groupTitle = SimpleView.GetGroupTitle(control.Label);
if (_renderedGroups.ContainsKey(groupTitle))
{
var group = _renderedGroups[groupTitle];
var y = group.LastRenderTopPosition;
var positionY = e.GetPosition(this).Y;
if (positionY >= y && positionY <= y + group.Height)
{
e.Handled = true;
group.IsExpanded = !group.IsExpanded;
InvalidateMeasure();
InvalidateArrange();
InvalidateVisual();
return;
}
}
}
}
}
base.OnMouseDown(e);
}
/// <summary>
/// When overridden in a derived class, positions child elements and determines a size for a <see cref="T:System.Windows.FrameworkElement" /> derived class.
/// </summary>
/// <param name="finalSize">The final area within the parent that this element should use to arrange itself and its children.</param>
/// <returns>The actual size used.</returns>
protected override Size ArrangeOverride(Size finalSize)
{
var finalSizeInternal = finalSize;
if (Padding.Top > 0 || Padding.Bottom > 0 || Padding.Right > 0 || Padding.Left > 0)
{
var availableHeight = finalSize.Height - Padding.Top - Padding.Bottom;
if (availableHeight < 0d)
{
availableHeight = 0d;
}
var availableWidth = finalSize.Width - Padding.Left - Padding.Right;
if (availableWidth < 0d)
{
availableWidth = 0d;
}
finalSizeInternal = GeometryHelper.NewSize(availableWidth, availableHeight);
}
if (_lastControls == null)
{
return(base.ArrangeOverride(finalSize));
}
var finalWidth = finalSizeInternal.Width;
if (_scrollVertical.Visibility == Visibility.Visible)
{
finalWidth = Math.Max(finalWidth - SystemParameters.VerticalScrollBarWidth, 1);
}
var offsetTop = 0d;
if (_scrollVertical.Visibility == Visibility.Visible)
{
offsetTop = _scrollVertical.Value * -1;
}
var currentTop = offsetTop + Padding.Top;
if (!ShowGroupHeaders || GroupHeaderRenderer == null)
{
foreach (var control in _lastControls)
{
var lineHeight = 0d;
if (control.Label != null)
{
lineHeight = control.Label.DesiredSize.Height;
}
if (control.Edit != null)
{
lineHeight = Math.Max(lineHeight, control.Edit.DesiredSize.Height);
}
lineHeight = SnapToPixel(lineHeight);
if (control.Label != null)
{
if (!control.LabelSpansFullWidth)
{
control.Label.Arrange(GeometryHelper.NewRect(Padding.Left, currentTop, _labelWidth, lineHeight));
}
else
{
control.Label.Arrange(GeometryHelper.NewRect(Padding.Left, currentTop, SnapToPixel(finalWidth), lineHeight));
}
}
if (control.Edit != null && !control.LabelSpansFullWidth)
{
var editLeft = SnapToPixel(_labelWidth + HorizontalElementSpacing + Padding.Left);
var editWidth = Math.Max(SnapToPixel(finalWidth - editLeft + Padding.Left), 0);
for (var flowControlCounter = control.AdditionalEditControls.Count - 1; flowControlCounter >= 0; flowControlCounter--)
{
var flowControl = control.AdditionalEditControls[flowControlCounter];
var flowWidth = Math.Min(flowControl.DesiredSize.Width, editWidth);
flowControl.Arrange(GeometryHelper.NewRect(editLeft + editWidth - flowWidth, currentTop, flowWidth, lineHeight));
editWidth -= (flowWidth + AdditionalFlowElementSpacing);
if (editWidth < 0.1)
{
editWidth = 0d;
}
}
control.Edit.Arrange(GeometryHelper.NewRect(editLeft, currentTop, editWidth, lineHeight));
}
currentTop += lineHeight + VerticalElementSpacing;
}
}
else
{
var itemIndent = GroupHeaderRenderer.GetHeaderPaddingUsedForRendering("X").Left;
var currentGroupIsExpanded = true;
foreach (var control in _lastControls)
{
var lineHeight = 0d;
if (control.Label != null)
{
lineHeight = control.Label.DesiredSize.Height;
}
if (control.Edit != null)
{
lineHeight = Math.Max(lineHeight, control.Edit.DesiredSize.Height);
}
lineHeight = SnapToPixel(lineHeight);
if (control.Label != null && SimpleView.GetGroupBreak(control.Label))
{
var groupTitle = SimpleView.GetGroupTitle(control.Label);
if (_renderedGroups.ContainsKey(groupTitle))
{
currentGroupIsExpanded = _renderedGroups[groupTitle].IsExpanded;
currentTop += _renderedGroups[groupTitle].Height;
}
}
if (currentGroupIsExpanded)
{
if (control.Label != null)
{
control.Label.Visibility = Visibility.Visible;
if (!control.LabelSpansFullWidth)
{
control.Label.Arrange(GeometryHelper.NewRect(Padding.Left + itemIndent, currentTop, _labelWidth, lineHeight));
}
else
{
control.Label.Arrange(GeometryHelper.NewRect(Padding.Left + itemIndent, currentTop, SnapToPixel(finalWidth - itemIndent), lineHeight));
}
}
if (control.Edit != null)
{
control.Edit.Visibility = Visibility.Visible;
var editLeft = SnapToPixel(_labelWidth + HorizontalElementSpacing + Padding.Left + itemIndent);
var editWidth = Math.Max(SnapToPixel(finalWidth - editLeft + Padding.Left), 0);
for (var flowControlCounter = control.AdditionalEditControls.Count - 1; flowControlCounter >= 0; flowControlCounter--)
{
var flowControl = control.AdditionalEditControls[flowControlCounter];
var flowWidth = Math.Min(flowControl.DesiredSize.Width, editWidth);
flowControl.Visibility = Visibility.Visible;
flowControl.Arrange(GeometryHelper.NewRect(editLeft + editWidth - flowWidth, currentTop, flowWidth, lineHeight));
editWidth -= (flowWidth + AdditionalFlowElementSpacing);
if (editWidth < 0.1)
{
editWidth = 0d;
}
}
control.Edit.Arrange(GeometryHelper.NewRect(editLeft, currentTop, editWidth, lineHeight));
}
currentTop += lineHeight + VerticalElementSpacing;
}
else
{
if (control.Label != null)
{
control.Label.Visibility = Visibility.Collapsed;
}
if (control.Edit != null)
{
control.Edit.Visibility = Visibility.Collapsed;
}
foreach (var flowControl in control.AdditionalEditControls)
{
flowControl.Visibility = Visibility.Collapsed;
}
}
}
}
return(base.ArrangeOverride(finalSize));
}
/// <summary>
/// When overridden in a derived class, measures the size in layout required for child elements and determines a size for the <see cref="T:System.Windows.FrameworkElement" />-derived class.
/// </summary>
/// <param name="availableSize">The available size that this element can give to child elements. Infinity can be specified as a value to indicate that the element will size to whatever content is available.</param>
/// <returns>The size that this element determines it needs during layout, based on its calculations of child element sizes.</returns>
protected override Size MeasureOverride(Size availableSize)
{
var availableSizeInternal = availableSize;
if (Padding.Top > 0 || Padding.Bottom > 0 || Padding.Right > 0 || Padding.Left > 0)
{
var availableHeight = availableSize.Height - Padding.Top - Padding.Bottom;
if (availableHeight < 0d)
{
availableHeight = 0d;
}
var availableWidth = availableSize.Width - Padding.Left - Padding.Right;
if (availableWidth < 0d)
{
availableWidth = 0d;
}
availableSizeInternal = GeometryHelper.NewSize(availableWidth, availableHeight);
}
_lastControls = GetControls();
InvalidateVisual();
var widestLabel = 0d;
var totalHeight = 0d;
var foundGroupHeader = false;
var groupPadding = new Thickness();
if (ShowGroupHeaders && GroupHeaderRenderer != null)
{
foundGroupHeader = _lastControls.Where(c => c.Label != null).Any(control => !string.IsNullOrEmpty(SimpleView.GetGroupTitle(control.Label)));
}
if (foundGroupHeader)
{
groupPadding = GroupHeaderRenderer.GetHeaderPaddingUsedForRendering("X");
availableSizeInternal = GeometryHelper.NewSize(Math.Max(availableSizeInternal.Width - groupPadding.Left, 0), Math.Max(availableSizeInternal.Height, 0));
}
foreach (var control in _lastControls.Where(c => c.Label != null))
{
control.Label.Measure(availableSizeInternal);
if (!control.LabelSpansFullWidth) // For widest-label measurements, we do not consider span labels, since they always use the full width
{
widestLabel = Math.Max(control.Label.DesiredSize.Width, widestLabel);
}
}
foreach (var control in _lastControls.Where(c => !c.LabelSpansFullWidth && c.Edit != null))
{
var currentMaxWidth = SnapToPixel(availableSizeInternal.Width - widestLabel - HorizontalElementSpacing - groupPadding.Left);
for (var flowControlCounter = control.AdditionalEditControls.Count - 1; flowControlCounter >= 0; flowControlCounter--)
{
var flowControl = control.AdditionalEditControls[flowControlCounter];
var availableEditSize = GeometryHelper.NewSize(currentMaxWidth, availableSize.Height);
flowControl.Measure(availableEditSize);
currentMaxWidth = Math.Max(SnapToPixel(currentMaxWidth - flowControl.DesiredSize.Width), 0);
}
control.Edit.Measure(GeometryHelper.NewSize(currentMaxWidth, availableSize.Height));
}
var currentGroupIsExpanded = true;
foreach (var control in _lastControls)
{
var itemHeight = 0d;
if (control.Label != null)
{
itemHeight = control.Label.DesiredSize.Height;
}
if (control.Edit != null && !control.LabelSpansFullWidth)
{
itemHeight = Math.Max(itemHeight, control.Edit.DesiredSize.Height);
foreach (var flowControl in control.AdditionalEditControls)
{
itemHeight = Math.Max(itemHeight, flowControl.DesiredSize.Height);
}
}
itemHeight = SnapToPixel(itemHeight);
if (ShowGroupHeaders && control.Label != null && GroupHeaderRenderer != null && SimpleView.GetGroupBreak(control.Label))
{
var groupHeader = SimpleView.GetGroupTitle(control.Label) ?? string.Empty;
if (!_renderedGroups.ContainsKey(groupHeader))
{
_renderedGroups.Add(groupHeader, new PropertySheetGroupHeaderInfo {
IsExpanded = true
});
}
currentGroupIsExpanded = _renderedGroups[groupHeader].IsExpanded;
var currentPadding = GroupHeaderRenderer.GetHeaderPaddingUsedForRendering(string.IsNullOrEmpty(groupHeader) ? "X" : groupHeader);
_renderedGroups[groupHeader].Height = currentPadding.Top;
totalHeight += SnapToPixel(currentPadding.Top);
}
if (currentGroupIsExpanded)
{
totalHeight += itemHeight + VerticalElementSpacing;
}
}
_labelWidth = widestLabel;
totalHeight += Padding.Top + Padding.Bottom;
_lastTotalHeight = totalHeight;
HandleScrollBarVisibility(totalHeight, availableSize);
if (_scrollVertical.Visibility == Visibility.Visible)
{
foreach (var control in _lastControls.Where(c => !c.LabelSpansFullWidth && c.Edit != null))
{
var currentMaxWidth = SnapToPixel(SnapToPixel(availableSizeInternal.Width - widestLabel - HorizontalElementSpacing - SystemParameters.VerticalScrollBarWidth - 1));
for (var flowControlCounter = control.AdditionalEditControls.Count - 1; flowControlCounter >= 0; flowControlCounter--)
{
var flowControl = control.AdditionalEditControls[flowControlCounter];
var availableEditSize = GeometryHelper.NewSize(currentMaxWidth, availableSize.Height);
flowControl.Measure(availableEditSize);
currentMaxWidth = Math.Max(SnapToPixel(currentMaxWidth - flowControl.DesiredSize.Width), 0);
}
control.Edit.Measure(GeometryHelper.NewSize(currentMaxWidth, availableSize.Height));
}
}
return(GeometryHelper.NewSize(availableSize.Width, Math.Min(totalHeight, availableSize.Height)));
}