DesignSurface 实现设计器问题?

2009-04-19 02:39:59 3.7k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

C#用DesignSurface实现一个简单的窗体设计器 System.ComponentModel.Design.DesignSurface是为设计组件提供一个用户界面，通过它可以实现一个简单的窗体设计器。在构建之前，我们需要引入System.Design.dll，否则会出现找不到DesignSurface的错误。 1 private void Form1_Load(object sender, Even 阅读详情

用DesignSurface对象实现设计的两个问题.

DesignSurface surface = new DesignSurface();
surface.BeginLoad(typeof(System.Windows.Forms.Form));

Control view = (Control)surface.View;
view.Dock = DockStyle.Fill;
view.Parent = this.PelMain;
第一个是如何在宿主(view)中实现快捷菜单:如锁定、复制、删除、移到上层等。

IDesignerHost idh = (IDesignerHost)surface.GetService(typeof(IDesignerHost));
IComponentChangeService icc = (IComponentChangeService)idh.GetService(typeof(IComponentChangeService));

icc.ComponentRemoved += new ComponentEventHandler(icc_ComponentRemoved);
第二个：虽然可通过这个事件知道要移除的控件，但有些控件不让移除如何做。

谢谢！

...全文

[c# 自定义设计器] DesignSurface 和DesignSurfaceManager .NETFramework 2.0引入了两个类DesignSurface 和DesignSurfaceManager.给设计器提供宿主以及给设计器提供服务。DesignSurface是使用者所感知的设计器，它是UI使用者操纵改变设计时特征，DesignSurface 可能被当作一个单独的设计者使用或者和DesignSurfaceManager结合使用为设计器应用程序提供多个DesignSur... 阅读详情

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gomoku 2009-04-19

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// Form1.Designer.cs

namespace WindowsFormsApplication1

{

    partial class Form1

    {

        private System.ComponentModel.IContainer components = null;



        protected override void Dispose(bool disposing)

        {

            if (disposing && (components != null))

            {

                components.Dispose();

            }

            base.Dispose(disposing);

        }



        #region Windows Form Designer generated code

        private void InitializeComponent()

        {

            this.tableLayoutPanel1 = new System.Windows.Forms.TableLayoutPanel();

            this.propertyGrid1 = new System.Windows.Forms.PropertyGrid();

            this.groupBox1 = new System.Windows.Forms.GroupBox();

            this.btnBringforward = new System.Windows.Forms.Button();

            this.btnDelete = new System.Windows.Forms.Button();

            this.btnCopy = new System.Windows.Forms.Button();

            this.btnLock = new System.Windows.Forms.Button();

            this.listBox1 = new System.Windows.Forms.ListBox();

            this.tableLayoutPanel1.SuspendLayout();

            this.groupBox1.SuspendLayout();

            this.SuspendLayout();

            // 

            // tableLayoutPanel1

            // 

            this.tableLayoutPanel1.ColumnCount = 2;

            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Percent, 100F));

            this.tableLayoutPanel1.ColumnStyles.Add(new System.Windows.Forms.ColumnStyle(System.Windows.Forms.SizeType.Absolute, 300F));

            this.tableLayoutPanel1.Controls.Add(this.propertyGrid1, 1, 0);

            this.tableLayoutPanel1.Controls.Add(this.groupBox1, 1, 1);

            this.tableLayoutPanel1.Dock = System.Windows.Forms.DockStyle.Fill;

            this.tableLayoutPanel1.RowCount = 2;

            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 70F));

            this.tableLayoutPanel1.RowStyles.Add(new System.Windows.Forms.RowStyle(System.Windows.Forms.SizeType.Percent, 30F));

            // 

            // propertyGrid1

            // 

            this.propertyGrid1.Dock = System.Windows.Forms.DockStyle.Fill;

            // 

            // groupBox1

            // 

            this.groupBox1.Controls.Add(this.listBox1);

            this.groupBox1.Controls.Add(this.btnBringforward);

            this.groupBox1.Controls.Add(this.btnDelete);

            this.groupBox1.Controls.Add(this.btnCopy);

            this.groupBox1.Controls.Add(this.btnLock);

            this.groupBox1.Dock = System.Windows.Forms.DockStyle.Fill;

            this.groupBox1.TabStop = false;

            this.groupBox1.Text = "Double click the listbox to add control";

            // 

            // btnBringforward

            // 

            this.btnBringforward.Location = new System.Drawing.Point(6, 138);

            this.btnBringforward.Size = new System.Drawing.Size(136, 35);

            this.btnBringforward.TabIndex = 1;

            this.btnBringforward.Text = "&Bring Forward";

            this.btnBringforward.Click += new System.EventHandler(this.btnBringforward_Click);

            // 

            // btnDelete

            // 

            this.btnDelete.Location = new System.Drawing.Point(6, 100);

            this.btnDelete.Size = new System.Drawing.Size(136, 35);

            this.btnDelete.TabIndex = 2;

            this.btnDelete.Text = "&Delete";

            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);

            // 

            // btnCopy

            // 

            this.btnCopy.Location = new System.Drawing.Point(7, 62);

            this.btnCopy.Size = new System.Drawing.Size(135, 35);

            this.btnCopy.TabIndex = 3;

            this.btnCopy.Text = "©";

            this.btnCopy.Click += new System.EventHandler(this.btnCopy_Click);

            // 

            // btnLock

            // 

            this.btnLock.Location = new System.Drawing.Point(7, 21);

            this.btnLock.Size = new System.Drawing.Size(135, 35);

            this.btnLock.TabIndex = 4;

            this.btnLock.Text = "&Lock";

            this.btnLock.Click += new System.EventHandler(this.btnLock_Click);

            // 

            // listBox1

            // 

            this.listBox1.FormattingEnabled = true;

            this.listBox1.ItemHeight = 16;

            this.listBox1.Location = new System.Drawing.Point(149, 22);

            this.listBox1.Size = new System.Drawing.Size(139, 148);

            this.listBox1.TabIndex = 2;

            // 

            // Form1

            // 

            this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 16F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(963, 616);

            this.Controls.Add(this.tableLayoutPanel1);

            this.Name = "Form1";

            this.Text = "Designer Host";

            this.tableLayoutPanel1.ResumeLayout(false);

            this.groupBox1.ResumeLayout(false);

            this.ResumeLayout(false);



        }



        #endregion



        private System.Windows.Forms.TableLayoutPanel tableLayoutPanel1;

        private System.Windows.Forms.PropertyGrid propertyGrid1;

        private System.Windows.Forms.GroupBox groupBox1;

        private System.Windows.Forms.Button btnBringforward;

        private System.Windows.Forms.Button btnDelete;

        private System.Windows.Forms.Button btnCopy;

        private System.Windows.Forms.Button btnLock;

        private System.Windows.Forms.ListBox listBox1;

    }

}



// Program.cs

using System;

using System.Windows.Forms;



namespace WindowsFormsApplication1

{

    static class Program

    {

        [STAThread]

        static void Main()

        {

            Application.EnableVisualStyles();

            Application.SetCompatibleTextRenderingDefault(false);

            Application.Run(new Form1());

        }

    }

}

gomoku 2009-04-19

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这是个非常简单的例子，演示了用ISelectionService来获得当前组件，并用PropertyGrid来编辑该组件。
也演示了锁定、复制、删除、移到上层等简单操作，以及在锁定的状态下禁止一些操作。

虽然例子本身非常简单，但设计器本身是个非常大的议题，因此代码将分两部分贴出。
有兴趣的朋友们还可以参考：Windows Forms Programming: Design-Time Architecture



using System;

using System.ComponentModel;

using System.Drawing;

using System.Windows.Forms;

using System.ComponentModel.Design;

using System.ComponentModel.Design.Serialization;



namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        DesignSurface designSurface;

        IDesignerHost formDesignerHost;



        public Form1()

        {

            InitializeComponent();

            InitializeDesignerSurface();

            InitializeListBox();



            this.propertyGrid1.SelectedObject = this.formDesignerHost.RootComponent;

        }



        private void InitializeDesignerSurface()

        {

            this.designSurface = new System.ComponentModel.Design.DesignSurface(typeof(Form));

            Control view =  this.designSurface.View as Control;

            this.tableLayoutPanel1.Controls.Add(view, 0, 0);

            this.tableLayoutPanel1.SetRowSpan(view, 2);

            view.Dock = DockStyle.Fill;



            this.formDesignerHost = this.designSurface.GetService(typeof(IDesignerHost)) as IDesignerHost;

            this.formDesignerHost.AddService(typeof(INameCreationService), new MyNameService());

            ISelectionService selectionService = this.formDesignerHost.GetService(typeof(ISelectionService)) as ISelectionService;

            

            selectionService.SelectionChanged += delegate

            {

                System.Collections.ICollection collection = selectionService.GetSelectedComponents();

                object[] selectedObjects = new object[collection.Count];

                collection.CopyTo(selectedObjects, 0);

                this.propertyGrid1.SelectedObjects = selectedObjects;

            };

        }



        private void InitializeListBox()

        {

            this.listBox1.DisplayMember = "Name";

            this.listBox1.DataSource = new Type[]

            {

                typeof(Label), typeof(Button), typeof(TextBox), typeof(RadioButton),typeof(CheckBox),

            };



            this.listBox1.DoubleClick += delegate

            {

                CreateControl(this.listBox1.SelectedItem as Type);

            };

        }



        private void CreateControl(Type controlType)

        {

            if (typeof(Control).IsAssignableFrom(controlType) && !typeof(Form).IsAssignableFrom(controlType))

            {

                Control control = this.formDesignerHost.CreateComponent(controlType) as Control;

                control.Text = control.Name;

                control.Location = new Point(5, System.Environment.TickCount % 200);

                (this.formDesignerHost.RootComponent as Form).Controls.Add(control);

            }

        }



        private void btnLock_Click(object sender, EventArgs e)

        {

            foreach (IComponent component in this.propertyGrid1.SelectedObjects)

            {

                PropertyDescriptor lockedProperty = TypeDescriptor.GetProperties(component)["Locked"];

                if (lockedProperty != null)

                {

                    lockedProperty.SetValue(component, true);

                    this.propertyGrid1.Refresh();

                }

            }

        }



        private void btnCopy_Click(object sender, EventArgs e)

        {

            Control control = this.propertyGrid1.SelectedObject as Control;

            if (control != null) CreateControl(control.GetType());

        }



        private void btnDelete_Click(object sender, EventArgs e)

        {

            foreach (IComponent component in this.propertyGrid1.SelectedObjects)

            {

                if (component is Form == false && !IsLocked(component))

                {

                    this.formDesignerHost.DestroyComponent(component);

                }

            }



        }



        private void btnBringforward_Click(object sender, EventArgs e)

        {

            Control control = this.propertyGrid1.SelectedObject as Control;

            if (control != null && !IsLocked(control) ) control.BringToFront();

        }



        private bool IsLocked(IComponent component)

        {

            PropertyDescriptor lockedProperty = TypeDescriptor.GetProperties(component)["Locked"];

            if (lockedProperty != null) return (bool)lockedProperty.GetValue(component);

            return false;

        }



    }



    class MyNameService : INameCreationService

    {

        static int s_i = 0;

        public string CreateName(IContainer container, Type dataType)

        {

            return dataType.Name + s_i++;

        }



        public bool IsValidName(string name)

        {

            if (string.IsNullOrEmpty(name) == true) return false;

            if (char.IsDigit(name[0])) return false;

            foreach(char ch in name)

            {

                if (char.IsLetterOrDigit(ch) == false && ch != '_') return false;

            }

            return true;

        }



        public void ValidateName(string name)

        {

            if (!IsValidName(name)) throw new Exception("Invalid name");

        }

    }

}

蓝海D鱼 2009-04-19

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DesignSurface 实现设计器问题?

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