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| using System;
using System.Linq;
using System.Collections.Generic;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Markup;
using System.Xml;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
namespace essayeService
{
public partial class DesignerCanvas : Canvas
{
private Point? rubberbandSelectionStartPoint = null;
private SelectionService selectionService;
internal SelectionService SelectionService
{
get
{
if (selectionService == null)
selectionService = new SelectionService(this);
return selectionService;
}
}
protected override void OnMouseDown(MouseButtonEventArgs e)
{
base.OnMouseDown(e);
if (e.Source == this)
{
// in case that this click is the start of a
// drag operation we cache the start point
// sa c pour la selection dans la canvas"" dans le vide du canvas ""
this.rubberbandSelectionStartPoint = new Point?(e.GetPosition(this));
// if you click directly on the canvas all
// selected items are 'de-selected'
SelectionService.ClearSelection();
Focus();
e.Handled = true;
}
}
/******************************************************/
/* methode pour pouvoir selectionner dans le vide ****/
/****************************************************/
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
// if mouse button is not pressed we have no drag operation, ...
if (e.LeftButton != MouseButtonState.Pressed)
this.rubberbandSelectionStartPoint = null;
// ... but if mouse button is pressed and start
// point value is set we do have one
if (this.rubberbandSelectionStartPoint.HasValue)
{
// create rubberband adorner
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
RubberbandAdorner adorner = new RubberbandAdorner(this, rubberbandSelectionStartPoint);
if (adorner != null)
{
adornerLayer.Add(adorner);
}
}
}
e.Handled = true;
}
/***********************************************************************************************************************/
/***** c'est dans cette methode que je veux modifier mon controle template pour lui rajouter des connecteur ***********/
/*********************************************************************************************************************/
protected override void OnDrop(DragEventArgs e)
{
/***************************************************************************************************************/
/* ça c'est que je fait maintenant mais sans modifier le controle template pour le connector qui est definie dans
* DesigneItem.xaml,
/*****************************************************************************************************************/
Grid ss = new Grid();
ss.RowDefinitions.Add(new RowDefinition { Height = new GridLength(0.5, GridUnitType.Star) });
ss.RowDefinitions.Add(new RowDefinition { Height = new GridLength(0.5, GridUnitType.Star) });
TextBlock v = new TextBlock();
v.Text = "Test";
Grid.SetRow(v,1);
ss.Children.Add(v);
v.VerticalAlignment = VerticalAlignment.Center;
DesignerItem newItem = null;
newItem = new DesignerItem();
newItem.Height = 100;
newItem.Width = 100;
newItem.SetResourceReference(StyleProperty, "DesignStyle");
ss.Background = Brushes.Gray;
ss.IsHitTestVisible = false;
newItem.Content = ss;
SetConnectorDecoratorTemplate(newItem);
Canvas.SetLeft(newItem,50);
Canvas.SetTop(newItem, 50);
this.Children.Add(newItem);
/*************************************************************************************************************************/
/*ici c'est le code que j'ai essayé pour modifier le controle template mais sa ne fonctionne pas car lorsque je cherche
* la Grid pour la modifier en ajoutant des Conntector, sa donnr une exception
/*****************************************************************************************************************/
/*
DesignerItem newItem = null;
newItem = new DesignerItem();
newItem.SetResourceReference(StyleProperty, "DesignStyle");
Grid w = newItem.Template.FindName("PART_LesPointDeConnexion", newItem) as Grid; // ici le systeme bloque et je recois null dans la grid w
MessageBox.Show("" + w);
w.RowDefinitions.Add(new RowDefinition { Height = new GridLength(0.5, GridUnitType.Star) });
w.RowDefinitions.Add(new RowDefinition { Height = new GridLength(0.5, GridUnitType.Star) });
Connector cn = new Connector();
cn.Style = this.FindResource("styleCon") as Style;
cn.VerticalAlignment = VerticalAlignment.Bottom;
cn.HorizontalAlignment = HorizontalAlignment.Left;
w.Children.Add(cn);
Grid.SetColumn(cn, 0);
Grid.SetRow(cn, 1);
ss.Background = Brushes.Green;
ss.IsHitTestVisible = false;
newItem.Content = ss;
SetConnectorDecoratorTemplate(newItem);
Canvas.SetLeft(newItem,50);
Canvas.SetTop(newItem, 50);
this.Children.Add(newItem);
*/
}
protected override Size MeasureOverride(Size constraint)
{
Size size = new Size();
foreach (UIElement element in this.InternalChildren)
{
double left = Canvas.GetLeft(element);
double top = Canvas.GetTop(element);
left = double.IsNaN(left) ? 0 : left;
top = double.IsNaN(top) ? 0 : top;
//measure desired size for each child
element.Measure(constraint);
Size desiredSize = element.DesiredSize;
if (!double.IsNaN(desiredSize.Width) && !double.IsNaN(desiredSize.Height))
{
size.Width = Math.Max(size.Width, left + desiredSize.Width);
size.Height = Math.Max(size.Height, top + desiredSize.Height);
}
}
// add margin
size.Width += 10;
size.Height += 10;
return size;
}
private void SetConnectorDecoratorTemplate(DesignerItem item)
{
if (item.ApplyTemplate() && item.Content is UIElement)
{
ControlTemplate template = DesignerItem.GetConnectorDecoratorTemplate(item.Content as UIElement);
Control decorator = item.Template.FindName("PART_ConnectorDecorator", item) as Control;
if (decorator != null && template != null)
decorator.Template = template;
}
}
}
} |
Modifier Control Template dans le code Behind WPF/C#
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