private void DrawElements(Graphics graphics)
{
LayoutProperties layoutProperties = new LayoutProperties();
layoutProperties.DesignAreaLocation = DesignAreaLocation;
layoutProperties.DesignAreaSize = DesignAreaSize;
layoutProperties.ViewportLocation = ViewportLocation;
layoutProperties.ViewportSize = ViewportSize;
layoutProperties.ZoomRatio = ZoomRatio;
foreach (LayoutElement element in Layout.Elements)
{
LayoutElementRenderer elementRenderer = GetElementRendererForElementType(element.TypeName);
if (elementRenderer != null)
{
elementRenderer.Draw(element, graphics, layoutProperties);
if (IsElementInSelection(element))
{
TransformHandleType transformHandleType = TransformHandleType.All;
VisualLayoutElement visualLayoutElement = element as VisualLayoutElement;
if (visualLayoutElement != null && !visualLayoutElement.Rotatable)
{
if (!KeyboardHelper.IsShiftKeyPressed)
{
transformHandleType = TransformHandleType.All;
}
else
{
transformHandleType = TransformHandleType.OnlyCorners;
}
}
DesignerHelper.DrawTransformHandles(graphics, element, layoutProperties, transformHandleType);
}
}
else
{
throw new Exception("Element renderer for element type not found!");
}
}
}
public static void DrawTransformHandles(Graphics graphics, LayoutElement element, LayoutProperties layoutProperties, TransformHandleType handleType)
{
Point elementLocation = element.Location.Multiply(layoutProperties.ZoomRatio);
elementLocation = elementLocation.Add(layoutProperties.DesignAreaLocation);
elementLocation = elementLocation.Subtract(layoutProperties.ViewportLocation);
Size elementSize = element.Size;
elementSize = elementSize.Multiply(layoutProperties.ZoomRatio);
Pen penRectangle = new Pen(Color.Silver);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation, elementSize), 1);
Pen penHandle = new Pen(Color.Black);
Brush brushHandle = new SolidBrush(Color.White);
Size handleSize = new Size(HANDLE_WIDTH, HANDLE_HEIGHT);
if (handleType == TransformHandleType.All || handleType == TransformHandleType.OnlyCorners)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()), handleSize), 2);
}
if (handleType == TransformHandleType.All)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width / 2), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width / 2), handleSize), 2);
}
if (handleType == TransformHandleType.All || handleType == TransformHandleType.OnlyCorners)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width), handleSize), 2);
}
if (handleType == TransformHandleType.All)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddY(elementSize.Height / 2), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddY(elementSize.Height / 2), handleSize), 2);
}
if (handleType == TransformHandleType.All)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width).AddY(elementSize.Height / 2), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width).AddY(elementSize.Height / 2), handleSize), 2);
}
if (handleType == TransformHandleType.All || handleType == TransformHandleType.OnlyCorners)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddY(elementSize.Height), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddY(elementSize.Height), handleSize), 2);
}
if (handleType == TransformHandleType.All)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width / 2).AddY(elementSize.Height), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width / 2).AddY(elementSize.Height), handleSize), 2);
}
if (handleType == TransformHandleType.All || handleType == TransformHandleType.OnlyCorners)
{
graphics.FillRoundedRectangle(brushHandle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width).AddY(elementSize.Height), handleSize), 2);
graphics.DrawRoundedRectangle(penRectangle, new Rectangle(elementLocation.Subtract(handleSize.Half()).AddX(elementSize.Width).AddY(elementSize.Height), handleSize), 2);
}
}
