private static void MyColsProperty_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
DesignerCanvas designerCanvas = (DesignerCanvas)d;
int myCols = (int)e.NewValue;
if (myCols > 0 && designerCanvas.MyRows > 0 &&
designerCanvas.ActualHeight > 0 && designerCanvas.ActualWidth > 0)
{
designerCanvas.BrushGrid();
}
}
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
string xamlString = e.Data.GetData("DESIGNER_ITEM") as string;
if (!String.IsNullOrEmpty(xamlString))
{
DesignerItem newItem = null;
//FrameworkElement content = XamlReader.Load(XmlReader.Create(new StringReader(xamlString))) as FrameworkElement;
Button content = new Button()
{
Content = xamlString, Background = Brushes.Gray
};
content.IsHitTestVisible = false;
if (content != null)
{
newItem = new DesignerItem();
newItem.Style = this.TryFindResource("DesignerItemStyle") as Style;
newItem.Content = content;
Point position = e.GetPosition(this);
//if (content.MinHeight != 0 && content.MinWidth != 0)
//{
// newItem.Width = content.MinWidth * 2; ;
// newItem.Height = content.MinHeight * 2;
//}
//else
//{
// newItem.Width = 65;
// newItem.Height = 65;
//}
double unitwidth = this.ActualWidth / MyCols;
double unitheight = this.ActualHeight / MyRows;
newItem.Width = unitwidth;
newItem.Height = unitheight;
double left = Math.Floor(position.X / unitwidth) * unitwidth;
double top = Math.Floor(position.Y / unitheight) * unitheight;
DesignerCanvas.SetLeft(newItem, Math.Max(0, left /*position.X - newItem.Width / 2*/));
DesignerCanvas.SetTop(newItem, Math.Max(0, top /*position.Y - newItem.Height / 2*/));
this.Children.Add(newItem);
this.DeselectAll();
newItem.IsSelected = true;
}
e.Handled = true;
}
}
private void DesignerItem_Loaded(object sender, RoutedEventArgs e)
{
if (this.Template != null)
{
//ContentPresenter contentPresenter =
// this.Template.FindName("PART_ContentPresenter", this) as ContentPresenter;
//MoveThumb thumb =
// this.Template.FindName("PART_MoveThumb", this) as MoveThumb;
MenuItem menu_delete = this.Template.FindName("PART_Delete", this) as MenuItem;
if (menu_delete != null)
{
//delete the DesignerItem
menu_delete.Click += new RoutedEventHandler((x, y) =>
{
DesignerCanvas designer = (DesignerCanvas)VisualTreeHelper.GetParent(this);
if (designer != null)
{
designer.Children.Remove(this);
}
});
}
//if (contentPresenter != null && thumb != null)
//{
// UIElement contentVisual =
// VisualTreeHelper.GetChild(contentPresenter, 0) as UIElement;
// if (contentVisual != null)
// {
// ControlTemplate template =
// DesignerItem.GetMoveThumbTemplate(contentVisual) as ControlTemplate;
// if (template != null)
// {
// thumb.Template = template;
// }
// }
//}
}
}
protected override void OnMouseDoubleClick(MouseButtonEventArgs e)
{
base.OnMouseDoubleClick(e);
DesignerCanvas designer = VisualTreeHelper.GetParent(this) as DesignerCanvas;
if (designer != null)
{
double h = designer.ActualHeight / designer.MyRows;
double w = designer.ActualWidth / designer.MyCols;
double left = DesignerCanvas.GetLeft(this);
double top = DesignerCanvas.GetTop(this);
double newleft = System.Math.Floor(left / w) * w;
double newtop = System.Math.Floor(top / h) * h;
double newright = System.Math.Ceiling((left + this.ActualWidth) / w) * w;
double newbottom = System.Math.Ceiling((top + this.ActualHeight) / h) * h;
DesignerCanvas.SetLeft(this, newleft);
DesignerCanvas.SetTop(this, newtop);
this.Width = newright - newleft;
this.Height = newbottom - newtop;
}
}
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
DesignerCanvas designer = VisualTreeHelper.GetParent(this) as DesignerCanvas;
if (designer != null)
{
if ((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != ModifierKeys.None)
{
this.IsSelected = !this.IsSelected;
}
else
{
//if (!this.IsSelected)
//{
designer.DeselectAll();
this.IsSelected = true;
//}
}
}
e.Handled = false;
}
private void ResizeThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
if (this.designerItem != null && this.designerCanvas != null && this.designerItem.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
double minDeltaHorizontal = double.MaxValue;
double minDeltaVertical = double.MaxValue;
double dragDeltaVertical, dragDeltaHorizontal;
foreach (DesignerItem item in this.designerCanvas.SelectedItems)
{
minLeft = Math.Min(Canvas.GetLeft(item), minLeft);
minTop = Math.Min(Canvas.GetTop(item), minTop);
minDeltaVertical = Math.Min(minDeltaVertical, item.ActualHeight - item.MinHeight);
minDeltaHorizontal = Math.Min(minDeltaHorizontal, item.ActualWidth - item.MinWidth);
}
foreach (DesignerItem item in this.designerCanvas.SelectedItems)
{
switch (VerticalAlignment)
{
case VerticalAlignment.Bottom:
dragDeltaVertical = Math.Min(-e.VerticalChange, minDeltaVertical);
double h = item.ActualHeight - dragDeltaVertical;
if (DesignerCanvas.GetTop(item) + h < this.designerCanvas.ActualHeight)
{
item.Height = h;
}
break;
case VerticalAlignment.Top:
dragDeltaVertical = Math.Min(Math.Max(-minTop, e.VerticalChange), minDeltaVertical);
Canvas.SetTop(item, Canvas.GetTop(item) + dragDeltaVertical);
item.Height = item.ActualHeight - dragDeltaVertical;
break;
}
switch (HorizontalAlignment)
{
case HorizontalAlignment.Left:
dragDeltaHorizontal = Math.Min(Math.Max(-minLeft, e.HorizontalChange), minDeltaHorizontal);
Canvas.SetLeft(item, Canvas.GetLeft(item) + dragDeltaHorizontal);
item.Width = item.ActualWidth - dragDeltaHorizontal;
break;
case HorizontalAlignment.Right:
dragDeltaHorizontal = Math.Min(-e.HorizontalChange, minDeltaHorizontal);
double w = item.ActualWidth - dragDeltaHorizontal;
if (DesignerCanvas.GetLeft(item) + w < this.designerCanvas.ActualWidth)
{
item.Width = w;
}
break;
}
}
e.Handled = true;
}
}
