private double GetSizeRecalculationRatio(List <BuildingElement> elements, CanvasContext context, LayoutType layoutType)
{
switch (layoutType)
{
case LayoutType.Horizontal:
case LayoutType.HorizontalRightToLeft:
double sumOfRealWidths = 0.0;
foreach (BuildingElement element in elements)
{
sumOfRealWidths += element.GetRealWidth();
}
double contextWidth = context.Width;
double widthRatio = contextWidth / sumOfRealWidths;
return(widthRatio);
//break;
case LayoutType.Vertical:
case LayoutType.VerticalBottomToTop:
double sumOfRealHeights = 0.0;
foreach (BuildingElement element in elements)
{
//sumOfRealHeigths += element.GetRealWidth();
sumOfRealHeights += element.GetRealHeight();
}
double contextHeight = context.Height;
double heightRatio = contextHeight / sumOfRealHeights;
return(heightRatio);
//break;
default:
throw new NotSupportedException($"This layout type is not supported here: {layoutType}");
}
}
private CanvasContext GenerateChildContext(int left, int top, int width, int height)
{
//CanvasContext context = new CanvasContext(left, top, width, height);
CanvasContext context = new CanvasContext(left, top, width - 1, height - 1);
return(context);
}
private int GetChildTopStart(CanvasContext contextForChildren, LayoutType layoutType)
{
switch (layoutType)
{
case LayoutType.Horizontal:
case LayoutType.HorizontalRightToLeft:
return(contextForChildren.Top);
case LayoutType.Vertical:
return(contextForChildren.Top);
case LayoutType.VerticalBottomToTop:
return(contextForChildren.Top + contextForChildren.Height);
default:
throw new NotSupportedException($"This layout type is not supported here: {layoutType}");
}
}
private int CalculateHeight(double realHeight, double sizeRecalcRatio, CanvasContext totalContext, LayoutType layoutType)
{
switch (layoutType)
{
case LayoutType.Horizontal:
case LayoutType.HorizontalRightToLeft:
return(totalContext.Height);
//break;
case LayoutType.Vertical:
case LayoutType.VerticalBottomToTop:
double recalculatedHeight = realHeight * sizeRecalcRatio;
return(Convert.ToInt32(Math.Truncate(recalculatedHeight)));
//break;
default:
throw new NotSupportedException($"This layout type is not supported here: {layoutType}");
}
}
private void DrawElementAndItsChildren(BuildingElement element, CanvasContext context)
{
//rootElement.DrawSelf(graphics, context);
element.DrawSelf(graphics, context);
//CanvasContext context = GetCanvasForChildren(rootContext);
//DrawChildren(rootElement, )
List <BuildingElement> childElements = element.GetChildren();
// Are there any children at all?
if (childElements.Count > 0)
{
CanvasContext contextForChildren = element.GetContextForChildren(context);
LayoutType layoutForChildren = element.GetLayoutForChildren();
double sizeRecalcRatio = GetSizeRecalculationRatio(childElements, contextForChildren, layoutForChildren);
//int childLeft = contextForChildren.Left;
//int childTop = contextForChildren.Top;
//int childLeft = GetChildLeftStart(childElements, sizeRecalcRatio, contextForChildren, layoutForChildren);
//int childTop = GetChildTopStart(childElements, sizeRecalcRatio, contextForChildren, layoutForChildren);
int childLeft = GetChildLeftStart(contextForChildren, layoutForChildren);
int childTop = GetChildTopStart(contextForChildren, layoutForChildren);
foreach (BuildingElement childElement in childElements)
{
//int childWidth = CalculateWidth(childLeft, childElement.GetRealWidth(), sizeRecalcRatio, contextForChildren, layoutForChildren);
//int childHeight = CalculateHeight(childTop, childElement.GetRealHeight(), sizeRecalcRatio, contextForChildren, layoutForChildren);
int childWidth = CalculateWidth(childElement.GetRealWidth(), sizeRecalcRatio, contextForChildren, layoutForChildren);
int childHeight = CalculateHeight(childElement.GetRealHeight(), sizeRecalcRatio, contextForChildren, layoutForChildren);
// ***
childLeft -= GetWidthDecrement(childWidth, layoutForChildren);
childTop -= GetHeightDecrement(childHeight, layoutForChildren);
// ***
CanvasContext childContext = GenerateChildContext(childLeft, childTop, childWidth, childHeight);
DrawElementAndItsChildren(childElement, childContext);
//childLeft += childWidth;
//childTop += childHeight;
childLeft += GetWidthIncrement(childWidth, layoutForChildren);
childTop += GetHeightIncrement(childHeight, layoutForChildren);
}
}
}
public DrawEngine(BuildingElement rootElement, Graphics graphics, CanvasContext rootContext)
{
this.rootElement = rootElement;
this.graphics = graphics;
this.rootContext = rootContext;
}
