using Microsoft.Windows.Forms;
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.ComponentModel.Design;
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using System.Drawing;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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using System.Windows.Forms.Design;
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using System.Windows.Forms.Design.Behavior;
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namespace DPumpHydr.WinFrmUI.WenSkin.Design.Designer
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{
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public class UiControlsDesigner : ControlDesigner
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{
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public UiControlsDesigner() : base()
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{
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}
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//获取当前选择的子控件
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#region 私有属性
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public IUIControl uIControl => this.Component as IUIControl;
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private IUIControl selectUiControl;
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#region 鼠标
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private bool isMouseDown = false;
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private Point oldPoint;
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#endregion
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#endregion
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public static int LoWord(int dwValue) => dwValue & 0xFFFF;
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public static int HiWord(int dwValue) => (dwValue >> 16) & 0xFFFF;
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protected override void WndProc(ref Message m)
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{
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base.WndProc(ref m);
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switch (m.Msg)
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{
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case 0x203:
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Point pi = new Point(LoWord((int)m.LParam), HiWord((int)m.LParam));
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var c = selectUiControl = FindSelectedControl(pi);
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if (c == null)
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return;
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CreateEventCode();
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break;
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//case 0x200:
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// pi = new Point(LoWord((int)m.LParam), HiWord((int)m.LParam));
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// if (isMouseDown && selectUiControl != null)
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// {
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// selectUiControl.Location = new Point(selectUiControl.Location.X + pi.X - oldPoint.X, selectUiControl.Location.Y + pi.Y - oldPoint.Y);
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// oldPoint = pi;
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// HookChildControls(this.Control);
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// }
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// break;
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}
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}
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private UIControl FindSelectedControl(Point pi)
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{
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if (uIControl != null)
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foreach (var item in uIControl.UIControls)
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{
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RectangleF rec = new RectangleF(item.Location, item.Size);
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if (rec.Contains(pi))
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{
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return item;
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}
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}
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return null;
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}
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private DesignerActionListCollection actionLists;
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public override DesignerActionListCollection ActionLists
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{
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get
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{
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if (actionLists == null)
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{
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actionLists = new DesignerActionListCollection();
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this.ActionLists.Add(new WenDesignerActionList(this.Component));
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}
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return actionLists;
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}
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}
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public class WenDesignerActionList : DesignerActionList
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{
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public WenDesignerActionList(IComponent component) : base(component)
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{
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}
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public IUIControl uIControl => this.Component as IUIControl;
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[Editor(typeof(DPumpHydr.WinFrmUI.WenSkin.Design.Editor.DuiWenCollectionEditor), typeof(System.Drawing.Design.UITypeEditor))]
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public UIControl.UIControlCollection UIControls => uIControl.UIControls;
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public override DesignerActionItemCollection GetSortedActionItems()
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{
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DesignerActionPropertyItem uIControls = new DesignerActionPropertyItem("UIControls", "子控件集合");
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return new DesignerActionItemCollection() { uIControls };
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}
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}
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//当响应在组件上按住鼠标左键不放这一操作时接收调用。
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protected override void OnMouseDragBegin(int x, int y)
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{
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var pi = this.Control.PointToClient(new Point(x, y));
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var c = selectUiControl = FindSelectedControl(pi);
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if (c != null)
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{
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isMouseDown = true;
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oldPoint = pi;
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}
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else
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base.OnMouseDragBegin(x, y);
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}
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//在拖放操作结束时接收调用，以完成或取消此次操作。
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protected override void OnMouseDragEnd(bool cancel)
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{
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isMouseDown = false;
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if (selectUiControl != null)
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{
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this.Control.Invalidate();
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selectUiControl = null;
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}
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base.OnMouseDragEnd(cancel);
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}
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//为拖放操作期间的每一次鼠标移动接收调用。
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protected override void OnMouseDragMove(int x, int y)
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{
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var pi = this.Control.PointToClient(new Point(x, y));
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if (isMouseDown && selectUiControl != null)
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{
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selectUiControl.Location = new Point(selectUiControl.Location.X + pi.X - oldPoint.X, selectUiControl.Location.Y + pi.Y - oldPoint.Y);
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oldPoint = pi;
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UpdateCode(selectUiControl as IComponent);
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}
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else
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base.OnMouseDragMove(x, y);
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}
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//重绘 选中的时候外框虚线框
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protected override void OnPaintAdornments(PaintEventArgs pe)
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{
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base.OnPaintAdornments(pe);
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if (selectUiControl != null)
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{
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using var pen = new Pen(Color.FromArgb(106, 106, 106)) { DashStyle = System.Drawing.Drawing2D.DashStyle.Dash };
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pe.Graphics.DrawRectangle(pen, selectUiControl.Location.X - 2, selectUiControl.Location.Y - 2, selectUiControl.Width + 4, selectUiControl.Height + 4);
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}
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}
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private void UpdateCode(IComponent com)
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{
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if (TryGetService(out IComponentChangeService service) && com != null)
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{
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service.OnComponentChanged(com, null, null, null);
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}
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}
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internal bool TryGetService<T>(out T service) where T : class
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{
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service = GetService<T>();
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return service != null;
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}
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internal T GetService<T>() where T : class => GetService(typeof(T)) as T;
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public override void DoDefaultAction()
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{
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}
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private void CreateEventCode()
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{
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if (!TryGetService(out IEventBindingService ebs))
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{
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return;
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}
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var ss = TypeDescriptor.GetEvents(selectUiControl);
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var eve = ss.Find("Click", true);
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if (eve == null) return;
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CreateEventCode(ebs, selectUiControl as IComponent, eve);
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ebs.ShowCode(selectUiControl as IComponent, eve);
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}
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private void CreateEventCode(IEventBindingService ebs, IComponent comp, EventDescriptor eventDescriptor)
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{
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if (ebs == null || comp == null || eventDescriptor == null)
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return;
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//如果找不到此事件的属性，或者该属性的属性为只读，则中止。
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if (!(ebs.GetEventProperty(eventDescriptor) is PropertyDescriptor propEvent) || propEvent.IsReadOnly)
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return;
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//如果解析的init方法中没有显式事件连接，则处理程序将为null
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object result = propEvent.GetValue(comp);
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string handler = result as string;
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bool eventChanged;
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if (handler is null)
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{
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//跳过无效属性。
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if (result != null)
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{
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return;
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}
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eventChanged = true;
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handler = ebs.CreateUniqueMethodName(comp, eventDescriptor);
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}
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else
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{
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//确保处理程序仍在那里
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eventChanged = true;
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ICollection methods = ebs.GetCompatibleMethods(eventDescriptor);
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if (methods != null)
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{
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foreach (string compatibleMethod in methods.OfType<string>())
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{
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if (handler == compatibleMethod)
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{
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eventChanged = false;
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break;
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}
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}
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}
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}
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//生成持久事件代码
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//保存新值。。。在导航到它之前！
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if (eventChanged)
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{
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propEvent.SetValue(comp, handler);
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}
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}
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protected override void PreFilterEvents(IDictionary events)
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{
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base.PreFilterEvents(events);
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}
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protected override void PreFilterProperties(System.Collections.IDictionary properties)
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{
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base.PreFilterProperties(properties);
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}
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}
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}
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