C# Label.CreateGraphics方法代码示例

		public void Init()
		{
			Label l = new Label();
			this.graphics = l.CreateGraphics();
			section = new BaseSection();
			section.Location = new Point (50,50);
			section.Size = new Size(400,200);
		}

        private void AjustarTamanhoFonte(Label label)
        {
            Graphics graphics = label.CreateGraphics();
            SizeF textSize = graphics.MeasureString(label.Text, label.Font);

            float falta = textSize.Width + 100 - label.Width;
            if (falta > 0)
                label.Font = new Font(label.Font.FontFamily, label.Font.Size - Math.Abs(falta) / 200, FontStyle.Bold);
        }

 private void adjustLabelSize(Label label)
 {
     string text = label.Text;
     Graphics g = label.CreateGraphics();
     SizeF oSize = g.MeasureString(text, label.Font);
     int nWidth = (int)oSize.Width + 5;
     int nHeight = 20;
     label.Width = nWidth;
     label.Height = nHeight;
 }

        public static void InitBorderTitle(this Control ctrl, Window window, Control child)
        {
            if (window is ActiveWindow)
            {
                ActiveWindow wnd = (ActiveWindow)window;
                if (ctrl.Controls.ContainsKey("LabelTitle")) ctrl.Controls.RemoveByKey("LabelTitle");
                if (wnd.BorderVisible)
                {
                    ctrl.SuspendLayout();
                    child.SuspendLayout();
                    child.Left += wnd.BorderWidth;
                    child.Width -= wnd.BorderWidth << 1;
                    child.Height -= wnd.BorderWidth;

                    System.Windows.Forms.Label title = new System.Windows.Forms.Label();
                    title.AutoSize = false;
                    title.Name = "LabelTitle";
                    title.BackColor = wnd.BorderColorFrienly;
                    title.Font = new Font(wnd.TitleFont, wnd.TitleSize);
                    title.ForeColor = wnd.TitleColorFrienly;
                    title.Text = wnd.TitleText;
                    title.Left = wnd.BorderWidth;
                    title.Top = 0;
                    using (Graphics g = title.CreateGraphics())
                    {
                        title.Size = g.MeasureString(wnd.TitleText, title.Font).ToSize();
                    }
                    title.Width = child.Width;
                    title.AutoEllipsis = true;
                    title.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;

                    ctrl.Controls.Add(title);
                    if (title.Height == 0)
                    {
                        child.Top += wnd.BorderWidth;
                        child.Height -= wnd.BorderWidth;
                    }
                    else
                    {
                        child.Top += title.Height;
                        child.Height -= title.Height;
                    }

                    ctrl.BackColor = wnd.BorderColorFrienly;
                    child.ResumeLayout();
                    ctrl.ResumeLayout();
                    title.Invalidate();
                }
                ctrl.Text = wnd.TitleText;
            }
        }

        private void InvoiceControl_Load( object sender, EventArgs e )
        {
            if( invoice == null ) {
                return;
            }
            lblName.Text = string.Format( "{0}, {1}, {2} kr", invoice.Name, invoice.Date.ToString( "yyyy-MM-dd" ), invoice.Amount );
            int y = 0;
            if( !string.IsNullOrEmpty( invoice.Comment ) ) {
                using( Font font = new Font( "Microsoft Sans Serif", 8, FontStyle.Italic ) ) {
                    Label l = new Label { Text = invoice.Comment, Top = y, Left = 10, Font = font, AutoSize = true, Width = pnlPayments.Width - 5, Anchor = AnchorStyles.Left | AnchorStyles.Top | AnchorStyles.Right };
                    using( Graphics gr = l.CreateGraphics() ) {
                        SizeF measureString = gr.MeasureString( invoice.Comment, font );
                        l.Height = (int)(measureString.Height + 5);
                    }
                    pnlPayments.Controls.Add( l );
                    y += l.Height + 5;
                }
            }
            using( Font font = new Font( "Microsoft Sans Serif", 9 ) ) {
                Label l;
                foreach( InvoicePayment payment in invoice.Payments ) {
                    l = new Label { Text = string.Format( "{0} kr", payment.Amount ), Top = y, Left = 10, Font = font, AutoSize = true};
                    pnlPayments.Controls.Add( l );
                    l = new Label { Text = string.Format( "{0}", payment.Date.ToString( "yyyy-MM-dd" ) ), Top = y, Left = 100, Font = font, AutoSize = true };
                    pnlPayments.Controls.Add( l );
                    y += l.Height + 5;
                }
                if( y == 0 ) {
                    l = new Label { Text = "No payments found...", Top = y, Left = 10, Font = font, AutoSize = true };
                    pnlPayments.Controls.Add( l );
                    y += l.Height + 5;
                }
                l = new Label { Text = "Balance", Top = y, Left = 10, Font = font, AutoSize = true };
                l.ForeColor = invoice.Balance <= 0 ? Color.Green : Color.Red;
                pnlPayments.Controls.Add( l );
                l = new Label { Text = string.Format( "{0} kr", invoice.Balance ), Top = y, Left = 100, Font = font, AutoSize = true };
                l.ForeColor = invoice.Balance <= 0 ? Color.Green : Color.Red;
                pnlPayments.Controls.Add( l );
                y += l.Height + 5;

                Button b = new Button { Top = y, Left = 15, Font = font, AutoSize = true, Text = "Add payment" };
                b.Click += AddPaymentClick;
                pnlPayments.Controls.Add( b );
            }
        }

 private void SetLabelText(Label label, string text)
 {
     if (label.Width > label.CreateGraphics().MeasureString(text+ ": " + FileDescription, label.Font).Width)
         label.Text = text;
     else
         label.Text = Path.GetFileName(text);
     if (FileDescription.Length > 0)
         label.Text += ": " + FileDescription;
 }

 private static int computeLabelWidth(Label l)
 {
     Graphics g = l.CreateGraphics();
     int result = (int)g.MeasureString(l.Text, l.Font).Width + l.Margin.Horizontal;
     g.Dispose();
     return result;
 }

 private void FitToWidth(Label ctrl, float maxAdjust)
 {
     Font retFont = (Font)ctrl.Font.Clone();
     float minSize = retFont.Size - maxAdjust;
     using (Graphics graphics = ctrl.CreateGraphics())
     {
         float textWidth = graphics.MeasureString(ctrl.Text, retFont).Width;
         while (textWidth > (float)ctrl.Width && retFont.Size > minSize)
         {
             retFont = new Font(retFont.Name, (retFont.Size - 0.1F));
             textWidth = graphics.MeasureString(ctrl.Text, retFont).Width;
         }
         ctrl.Font = retFont;
     }
 }

//.........这里部分代码省略.........
                        m_control = jtxt;
                        m_form.error.SetIconAlignment(m_control, ErrorIconAlignment.MiddleLeft);
                        break;

                    case FieldType.jid_multi:
                        JidMulti multi = new JidMulti();
                        multi.AddRange(m_val);
                        m_control = multi;
                        break;

                    case FieldType.Fixed:
                        // All of this so that we can detect URLs.
                        // We can't just make it disabled, because then the URL clicked
                        // event handler doesn't fire, and there's no way to set the
                        // text foreground color.
                        // It would be cool to make copy work, but it doesn't work for
                        // labels, either.
                        RichTextBox rich = new RichTextBox();
                        rich.DetectUrls = true;
                        rich.Text = string.Join("\r\n", f.Vals);
                        rich.ScrollBars = RichTextBoxScrollBars.None;
                        rich.Resize += new EventHandler(lbl_Resize);
                        rich.BorderStyle = BorderStyle.None;
                        rich.LinkClicked += new LinkClickedEventHandler(rich_LinkClicked);
                        rich.BackColor = System.Drawing.SystemColors.Control;
                        rich.KeyPress += new KeyPressEventHandler(rich_KeyPress);
                        rich.GotFocus += new EventHandler(rich_GotFocus);
                        rich.AcceptsTab = false;
                        rich.AutoSize = false;
                        m_control = rich;
                        break;
                    default:
                        TextBox txt = new TextBox();
                        txt.Lines = m_val;
                        m_control = txt;
                        break;
                }

                if (m_type != FieldType.hidden)
                {
                    m_control.Parent = p;

                    if (f.Desc != null)
                        form.tip.SetToolTip(m_control, f.Desc);

                    String lblText = "";

                    if (f.Label != "")
                        lblText = f.Label + ":";
                    else if (f.Var != "")
                        lblText = f.Var + ":";

                    if (lblText != "")
                    {
                        m_label = new Label();
                        m_label.Parent = p;
                        m_label.Text = lblText;

                        if (m_required)
                        {
                            m_label.Text = "* " + m_label.Text;
                            m_form.error.SetIconAlignment(m_control, ErrorIconAlignment.MiddleLeft);

                            m_control.Validating += new CancelEventHandler(m_control_Validating);
                            m_control.Validated += new EventHandler(m_control_Validated);
                        }
                        Graphics graphics = m_label.CreateGraphics();
                        SizeF s = m_label.Size;
                        s.Height = 0;
                        int chars;
                        int lines;
                        SizeF textSize = graphics.MeasureString(m_label.Text, m_label.Font, s, StringFormat.GenericDefault, out chars, out lines);
                        m_label.Height = (int) (textSize.Height);

                        if (lines > 1)
                            m_label.TextAlign = ContentAlignment.MiddleLeft;
                        else
                            m_label.TextAlign = ContentAlignment.TopLeft;

                        m_label.Top = 0;
                        p.Controls.Add(m_label);
                        m_control.Location = new Point(m_label.Width + 3, 0);
                        m_control.Width = p.Width - m_label.Width - 6;
                        p.Height = Math.Max(m_label.Height, m_control.Height) + 4;
                    }
                    else
                    {
                        m_control.Location = new Point(0, 0);
                        m_control.Width = p.Width - 6;
                        p.Height = m_control.Height + 4;
                    }
                    m_control.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
                    p.Controls.Add(m_control);
                    p.Dock = DockStyle.Top;
                    m_form.pnlFields.Controls.Add(p);

                    if (m_form.m_type != XDataType.form)
                        m_control.Enabled = false;
                }
            }

        protected override void OnClick(EventArgs click)
        {
            base.OnClick(click);

            if (this.m_Classrooms.Count <= 0)
                return;

            TCPClassroomManager manager = this.m_Classrooms[0];
            if (!m_Connected) {

                Form form = new Form();
                form.Text = "Connect to TCP Server...";
                form.ClientSize = new Size(350, form.ClientSize.Height);
                form.FormBorderStyle = FormBorderStyle.FixedDialog;

                Label label = new Label();
                label.Text = "Server:";
                using (Graphics graphics = label.CreateGraphics())
                    label.ClientSize = Size.Add(new Size(10, 0),
                        graphics.MeasureString(label.Text, label.Font).ToSize());
                label.Location = new Point(5, 5);

                TextBox host = new TextBox();
                host.Location = new Point(label.Right + 10, label.Top);
                host.Width = form.ClientSize.Width - host.Left - 5;

                Button okay = new Button();
                okay.Text = Strings.OK;
                okay.Width = (host.Right - label.Left) / 2 - 5;
                okay.Location = new Point(label.Left, Math.Max(host.Bottom, label.Bottom) + 10);

                Button cancel = new Button();
                cancel.Text = Strings.Cancel;
                cancel.Width = okay.Width;
                cancel.Location = new Point(okay.Right + 10, okay.Top);

                EventHandler connect = delegate(object source, EventArgs args) {
                    try {
                        //manager.ClientConnect(host.Text); //obsolete
                        this.m_Connected = true;
                        this.Text = "Disconnect from &TCP Server...";
                        form.Dispose();
                    }
                    catch (Exception e) {
                        MessageBox.Show(
                            string.Format("Classroom Presenter 3 was unable to connect to\n\n"
                                + "\t\"{0}\"\n\nfor the following reason:\n\n{1}",
                                host.Text, e.Message),
                            "Connection Error",
                            MessageBoxButtons.OK,
                            MessageBoxIcon.Error);
                        this.m_Connected = false;
                    }
                };

                host.KeyPress += delegate(object source, KeyPressEventArgs args) {
                    if (args.KeyChar == '\r')
                        connect(source, EventArgs.Empty);
                };

                okay.Click += connect;

                cancel.Click += delegate(object source, EventArgs args) {
                    this.m_Connected = false;
                    form.Dispose();
                };

                form.ClientSize = new Size(form.ClientSize.Width, Math.Max(okay.Bottom, cancel.Bottom) + 5);

                form.Controls.Add(label);
                form.Controls.Add(host);
                form.Controls.Add(okay);
                form.Controls.Add(cancel);

                DialogResult dr = form.ShowDialog(this.GetMainMenu() != null ? this.GetMainMenu().GetForm() : null);
            }
            else {
                //manager.ClientDisconnect();
                this.Text = "Connect to &TCP Server...";
                m_Connected = false;
            }
        }

		void ChooseLabelFont(Label label) {
			if ((bool?)label.Tag != true)
				return;

			using (var g = label.CreateGraphics()) {
				int sizeRatio = (int)g.MeasureString(label.Text, font).Width / GameArea.ClientSize.Width;
				if (sizeRatio >= 2)
					label.Font = extraSmallFont;
				else if (sizeRatio >= 1)
					label.Font = smallFont;
				else
					label.Font = font;
			}
		}

        private Label createLabel(string text)
        {
            Label lbl = new Label();
            lbl.Text = text;
            lbl.Width = (int)lbl.CreateGraphics().MeasureString(text, this.pnlQGroup.Font).Width + 6;
            System.Windows.Forms.Padding margin = lbl.Margin;
            margin.Top = 3;
            margin.Right = 0;
            lbl.Margin = margin;

            return lbl;
        }

        /// <summary>
        /// Hộp thoại nhập giá trị
        /// </summary>
        /// <param name="promptText">Nội dung</param>
        /// <param name="title">Tiêu đề</param>
        /// <param name="value">Lưu giá trị người dùng nhập</param>
        /// <returns>Nút người dùng bấm</returns>
        private DialogResult InputBox(string promptText, string title, ref string value)
        {
            Form form = new Form();
            Label label = new Label();
            TextBox textBox = new TextBox();
            Button buttonOk = new Button();
            Button buttonCancel = new Button();

            form.Text = title;
            label.Text = promptText;
            textBox.Text = value;

            buttonOk.Text = "OK";
            buttonCancel.Text = "Cancel";
            buttonOk.DialogResult = DialogResult.OK;
            buttonCancel.DialogResult = DialogResult.Cancel;

            SizeF textSize = label.CreateGraphics().MeasureString(promptText, label.Font);
            if (textSize.Width < 75 * 2 + 30)
                textSize.Width = 75 * 2 + 10;
            label.SetBounds(10, 10, (int)textSize.Width, (int)textSize.Height); //x , y , width , height
            label.AutoSize = false;
            textBox.SetBounds(label.Left, label.Bottom + 5, label.Width, 20);
            buttonOk.SetBounds(label.Right - 75, textBox.Bottom + 5, 75, 23);
            buttonCancel.SetBounds(label.Right - 75*2 - 10, textBox.Bottom + 5, 75, 23);
            textBox.Anchor = textBox.Anchor | AnchorStyles.Right;
            buttonOk.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
            buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;

            form.ClientSize = new Size(label.Right + 10, buttonOk.Bottom + 10);
            form.Controls.AddRange(new Control[] { label, textBox, buttonOk, buttonCancel });
            //form.ClientSize = new Size(Math.Max(300, label.Right + 10), form.ClientSize.Height);
            form.FormBorderStyle = FormBorderStyle.FixedDialog;
            form.StartPosition = FormStartPosition.CenterScreen;
            form.MinimizeBox = false;
            form.MaximizeBox = false;
            form.AcceptButton = buttonOk;
            form.CancelButton = buttonCancel;

            DialogResult dialogResult = form.ShowDialog();
            value = textBox.Text;
            return dialogResult;
        }

        public void OnClick(object obj, EventArgs click)
        {
            if (!(this.Checked)) {
                if (this.m_Connected) {
                    using (Synchronizer.Lock(this.m_ClassroomManager.Classroom.SyncRoot))
                        this.m_ClassroomManager.Classroom.Connected = false;
                    this.Text = Strings.ConnectToTCPServer;
                    this.m_Connected = false;

                }
                return;
            }

            if (this.m_ClassroomManager == null)
                return;

            using (Synchronizer.Lock(this.m_Model.ViewerState.SyncRoot)) {
                this.m_Model.ViewerState.ManualConnectionButtonName = this.Text;
            }
            if (this.m_Connected) {
                using (Synchronizer.Lock(this.m_ClassroomManager.Classroom.SyncRoot))
                    this.m_ClassroomManager.Classroom.Connected = false;
                this.Text = Strings.ConnectToTCPServer;
                this.m_Connected = false;
            }

            Label label = new Label();
            label.FlatStyle = FlatStyle.System;
            label.Font = Model.Viewer.ViewerStateModel.StringFont2;
            label.Text = Strings.ServerNameAddress;
            using (Graphics graphics = label.CreateGraphics())
                label.ClientSize = Size.Add(new Size(10, 0),
                    graphics.MeasureString(label.Text, label.Font).ToSize());
            label.Location = new Point(5, 5);

            Form form = new Form();
            form.Font = Model.Viewer.ViewerStateModel.FormFont;
            form.Text = Strings.ConnectToTCPServer;
            form.ClientSize = new Size(label.Width * 3, 2 * form.ClientSize.Height);
            form.FormBorderStyle = FormBorderStyle.FixedDialog;

            TextBox addressInput = new TextBox();
            addressInput.Font = Model.Viewer.ViewerStateModel.StringFont2;
            addressInput.Size = new Size(((int)(form.ClientSize.Width - (label.Width * 1.2))), this.Font.Height);
            addressInput.Location = new Point(((int)(label.Right * 1.1)), label.Top);

            using (Synchronizer.Lock(this.m_Model.ViewerState.SyncRoot)) {
                if (this.m_Model.ViewerState.TCPaddress != "" && this.m_Model.ViewerState.TCPaddress.Length != 0) {
                    string addr = this.m_Model.ViewerState.TCPaddress;
                    addressInput.Text = addr;
                }
            }

            Label label2 = new Label();
            label2.FlatStyle = FlatStyle.System;
            label2.Font = Model.Viewer.ViewerStateModel.StringFont2;
            label2.Text = Strings.Port + " (default: " + TCPServer.DefaultPort.ToString() + ")";
            using (Graphics graphics = label.CreateGraphics())
                label2.ClientSize = Size.Add(new Size(10, 0),
                    graphics.MeasureString(label2.Text, label2.Font).ToSize());
            label2.Location = new Point(5, Math.Max(addressInput.Bottom, label.Bottom) + 10);

            TextBox portInput = new TextBox();
            portInput.Font = Model.Viewer.ViewerStateModel.StringFont2;
            portInput.Size = new Size((4 / 3) * sizeConst, sizeConst / 2);
            portInput.Location = new Point(addressInput.Left, label2.Top);

            using (Synchronizer.Lock(this.m_Model.ViewerState.SyncRoot)) {
                if (this.m_Model.ViewerState.TCPport != 0) {
                    portInput.Text = this.m_Model.ViewerState.TCPport.ToString();
                }
                else {
                    portInput.Text = TCPServer.DefaultPort.ToString();
                }
            }

            Button okay = new Button();
            okay.FlatStyle = FlatStyle.System;
            okay.Font = Model.Viewer.ViewerStateModel.StringFont;
            okay.Text = Strings.OK;
            okay.Width = (addressInput.Right - label.Left) / 2 - 5;
            okay.Location = new Point(label.Left, Math.Max(portInput.Bottom, label2.Bottom) + 10);

            Button cancel = new Button();
            cancel.FlatStyle = FlatStyle.System;
            cancel.Font = Model.Viewer.ViewerStateModel.StringFont;
            cancel.Text = Strings.Cancel;
            cancel.Width = okay.Width;
            cancel.Location = new Point(okay.Right + 10, okay.Top);

            EventHandler connect = delegate(object source, EventArgs args) {

                    string address = addressInput.Text;

                using (Synchronizer.Lock(this.m_Model.ViewerState.SyncRoot)) {
                    this.m_Model.ViewerState.TCPaddress = address;
                }
                try {
                    IPAddress ipaddress;
                    if (!IPAddress.TryParse(address, out ipaddress)) {
//.........这里部分代码省略.........

        private Label getKeyLabel(String key)
        {
            Label newLabel = new Label();
            Boolean isText = true;

            if (!key.Equals("+"))
            {
                newLabel.BackColor = System.Drawing.Color.White;
                newLabel.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;

                switch (key)
                {
                    case "UP":
                        newLabel.Image = global::ACPAddIn.Properties.Resources.up;
                        isText = false;
                        break;
                    case "DOWN":
                        newLabel.Image = global::ACPAddIn.Properties.Resources.down;
                        isText = false;
                        break;
                    case "LEFT":
                        newLabel.Image = global::ACPAddIn.Properties.Resources.left;
                        isText = false;
                        break;
                    case "RIGHT":
                        newLabel.Image = global::ACPAddIn.Properties.Resources.right;
                        isText = false;
                        break;
                    case "COMMA":
                        newLabel.Text = "<";
                        break;
                    case "PERIOD":
                        newLabel.Text = ">";
                        break;
                    default:
                        newLabel.Text = key;
                        break;
                }

                int width=22;

                if (isText)
                {
                    Graphics g = newLabel.CreateGraphics();
                    width = (int)g.MeasureString(newLabel.Text, newLabel.Font).Width;
                    g.Dispose();
                    width += 5;
                }

                // Make the label a square if the width is too small
                if (width < 26)
                {
                    width = 26;
                }

                newLabel.Size = new System.Drawing.Size(width, 26);

                newLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            }
            else
            {
                newLabel.Size = new System.Drawing.Size(10, 26);
                newLabel.Text = key;
                newLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            }

            return newLabel;
        }