ComboBoxRenderer.DrawTextBox Method

Definition

Namespace:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Draws a text box with the current visual style of the operating system.

Overloads

DrawTextBox(Graphics, Rectangle, ComboBoxState)	Draws a text box in the specified state and bounds.
DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState)	Draws a text box in the specified state and bounds, with the specified text.
DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, ComboBoxState)	Draws a text box in the specified state and bounds, with the specified text and text bounds.
DrawTextBox(Graphics, Rectangle, String, Font, TextFormatFlags, ComboBoxState)	Draws a text box in the specified state and bounds, with the specified text and text formatting.
DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, TextFormatFlags, ComboBoxState)	Draws a text box in the specified state and bounds, with the specified text, text formatting, and text bounds.

DrawTextBox(Graphics, Rectangle, ComboBoxState)

Source:

ComboBoxRenderer.cs

Draws a text box in the specified state and bounds.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, state As ComboBoxState)

Parameters

g

Graphics

The Graphics used to draw the text box.

bounds

Rectangle

The Rectangle that specifies the bounds of the text box.

state

ComboBoxState

One of the ComboBoxState values that specifies the visual state of the text box.

Exceptions

InvalidOperationException

The operating system does not support visual styles.

-or-

Visual styles are disabled by the user in the operating system.

-or-

Visual styles are not applied to the client area of application windows.

Remarks

Before calling this method, you should verify that the IsSupported property returns true.

DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState)

Source:

ComboBoxRenderer.cs

Draws a text box in the specified state and bounds, with the specified text.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, state As ComboBoxState)

Parameters

g

Graphics

The Graphics used to draw the text box.

bounds

Rectangle

The Rectangle that specifies the bounds of the text box.

comboBoxText

String

The String to draw in the text box.

font

Font

The Font to apply to comboBoxText.

state

ComboBoxState

One of the ComboBoxState values that specifies the visual state of the text box.

Exceptions

InvalidOperationException

The operating system does not support visual styles.

-or-

Visual styles are disabled by the user in the operating system.

-or-

Visual styles are not applied to the client area of application windows.

Remarks

Before calling this method, you should verify that the IsSupported property returns true.

DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, ComboBoxState)

Source:

ComboBoxRenderer.cs

Draws a text box in the specified state and bounds, with the specified text and text bounds.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Drawing::Rectangle textBounds, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Drawing.Rectangle textBounds, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Drawing.Rectangle * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, textBounds As Rectangle, state As ComboBoxState)

Parameters

g

Graphics

The Graphics used to draw the text box.

bounds

Rectangle

The Rectangle that specifies the bounds of the text box.

comboBoxText

String

The String to draw in the text box.

font

Font

The Font to apply to comboBoxText.

textBounds

Rectangle

The Rectangle that specifies the bounds in which to draw comboBoxText.

state

ComboBoxState

One of the ComboBoxState values that specifies the visual state of the text box.

Exceptions

InvalidOperationException

The operating system does not support visual styles.

-or-

Visual styles are disabled by the user in the operating system.

-or-

Visual styles are not applied to the client area of application windows.

Examples

The following code example uses the DrawTextBox(Graphics, Rectangle, String, Font, ComboBoxState) method in a custom control's OnPaint method to draw a text box. This code example is part of a larger example provided for the ComboBoxRenderer class.

      // Draw the combo box in the current state.
protected:
    virtual void OnPaint(PaintEventArgs^ e) override 
    {
        Control::OnPaint(e);

        if (!ComboBoxRenderer::IsSupported)
        {
            this->Parent->Text = "Visual Styles Disabled";
            return;
        }

        this->Parent->Text = "CustomComboBox Enabled";

        // Always draw the main text box and drop down arrow in their
        // current states
        ComboBoxRenderer::DrawTextBox(e->Graphics, topTextBoxRectangle,
            this->Text, this->Font, textBoxState);
        ComboBoxRenderer::DrawDropDownButton(e->Graphics, arrowRectangle,
            arrowState);

        // Only draw the bottom text box if the arrow has been clicked
        if (isActivated)
        {
            ComboBoxRenderer::DrawTextBox(e->Graphics,
                bottomTextBoxRectangle, bottomText, this->Font,
                textBoxState);
        }
    }

protected:
    virtual void OnMouseDown(MouseEventArgs^ e) override 
    {
        Control::OnMouseDown(e);

        // Check whether the user clicked the arrow.
        if (arrowRectangle.Contains(e->Location) &&
            ComboBoxRenderer::IsSupported)
        {
            // Draw the arrow in the pressed state.
            arrowState = ComboBoxState::Pressed;

            // The user has activated the combo box.
            if (!isActivated)
            {
                this->Text = "Clicked!";
                textBoxState = ComboBoxState::Pressed;
                isActivated = true;
            }

            // The user has deactivated the combo box.
            else
            {
                this->Text = "Click here";
                textBoxState = ComboBoxState::Normal;
                isActivated = false;
            }

            // Redraw the control.
            Invalidate();
        }
    }

// Draw the combo box in the current state.
protected override void OnPaint(PaintEventArgs e)
{
    base.OnPaint(e);

    if (!ComboBoxRenderer.IsSupported)
    {
        this.Parent.Text = "Visual Styles Disabled";
        return;
    }

    this.Parent.Text = "CustomComboBox Enabled";

    // Always draw the main text box and drop down arrow in their 
    // current states
    ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle,
        this.Text, this.Font, textBoxState);
    ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle,
        arrowState);

    // Only draw the bottom text box if the arrow has been clicked
    if (isActivated)
    {
        ComboBoxRenderer.DrawTextBox(e.Graphics,
            bottomTextBoxRectangle, bottomText, this.Font,
            textBoxState);
    }
}

protected override void OnMouseDown(MouseEventArgs e)
{
    base.OnMouseDown(e);

    // Check whether the user clicked the arrow.
    if (arrowRectangle.Contains(e.Location) &&
        ComboBoxRenderer.IsSupported)
    {
        // Draw the arrow in the pressed state.
        arrowState = ComboBoxState.Pressed;

        // The user has activated the combo box.
        if (!isActivated)
        {
            this.Text = "Clicked!";
            textBoxState = ComboBoxState.Pressed;
            isActivated = true;
        }

        // The user has deactivated the combo box.
        else
        {
            this.Text = "Click here";
            textBoxState = ComboBoxState.Normal;
            isActivated = false;
        }

        // Redraw the control.
        Invalidate();
    }
}

' Draw the combo box in the current state.
Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
    MyBase.OnPaint(e)

    If Not ComboBoxRenderer.IsSupported Then
        Me.Parent.Text = "Visual Styles	Disabled"
        Return
    End If

    Me.Parent.Text = "CustomComboBox Enabled"

    ' Always draw the main text box and drop down arrow in their 
    ' current states.
    ComboBoxRenderer.DrawTextBox(e.Graphics, topTextBoxRectangle, _
        Me.Text, Me.Font, textBoxState)
    ComboBoxRenderer.DrawDropDownButton(e.Graphics, arrowRectangle, _
        arrowState)

    ' Only draw the bottom text box if the arrow has been clicked.
    If isActivated Then
        ComboBoxRenderer.DrawTextBox(e.Graphics, _
            bottomTextBoxRectangle, bottomText, Me.Font, textBoxState)
    End If
End Sub

Protected Overrides Sub OnMouseDown(ByVal e As MouseEventArgs)
    MyBase.OnMouseDown(e)

    ' Check whether the user clicked the arrow.
    If arrowRectangle.Contains(e.Location) And _
        ComboBoxRenderer.IsSupported Then

        ' Draw the arrow in the pressed state.
        arrowState = ComboBoxState.Pressed

        ' The user has activated the combo box.
        If Not isActivated Then
            Me.Text = "Clicked!"
            textBoxState = ComboBoxState.Pressed
            isActivated = True

        ' The user has deactivated the combo box.
        Else
            Me.Text = "Click here"
            textBoxState = ComboBoxState.Normal
            isActivated = False
        End If

        ' Redraw the control.
        Invalidate()
    End If
End Sub

Remarks

Before calling this method, you should verify that the IsSupported property returns true.

DrawTextBox(Graphics, Rectangle, String, Font, TextFormatFlags, ComboBoxState)

Source:

ComboBoxRenderer.cs

Draws a text box in the specified state and bounds, with the specified text and text formatting.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Windows::Forms::TextFormatFlags flags, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Windows.Forms.TextFormatFlags * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, flags As TextFormatFlags, state As ComboBoxState)

Parameters

g

Graphics

The Graphics used to draw the text box.

bounds

Rectangle

The Rectangle that specifies the bounds of the text box.

comboBoxText

String

The String to draw in the text box.

font

Font

The Font to apply to comboBoxText.

flags

TextFormatFlags

A bitwise combination of the TextFormatFlags values.

state

ComboBoxState

One of the ComboBoxState values that specifies the visual state of the text box.

Exceptions

InvalidOperationException

The operating system does not support visual styles.

-or-

Visual styles are disabled by the user in the operating system.

-or-

Visual styles are not applied to the client area of application windows.

Remarks

Before calling this method, you should verify that the IsSupported property returns true.

DrawTextBox(Graphics, Rectangle, String, Font, Rectangle, TextFormatFlags, ComboBoxState)

Source:

ComboBoxRenderer.cs

Draws a text box in the specified state and bounds, with the specified text, text formatting, and text bounds.

public:
 static void DrawTextBox(System::Drawing::Graphics ^ g, System::Drawing::Rectangle bounds, System::String ^ comboBoxText, System::Drawing::Font ^ font, System::Drawing::Rectangle textBounds, System::Windows::Forms::TextFormatFlags flags, System::Windows::Forms::VisualStyles::ComboBoxState state);

public static void DrawTextBox (System.Drawing.Graphics g, System.Drawing.Rectangle bounds, string? comboBoxText, System.Drawing.Font? font, System.Drawing.Rectangle textBounds, System.Windows.Forms.TextFormatFlags flags, System.Windows.Forms.VisualStyles.ComboBoxState state);

static member DrawTextBox : System.Drawing.Graphics * System.Drawing.Rectangle * string * System.Drawing.Font * System.Drawing.Rectangle * System.Windows.Forms.TextFormatFlags * System.Windows.Forms.VisualStyles.ComboBoxState -> unit

Public Shared Sub DrawTextBox (g As Graphics, bounds As Rectangle, comboBoxText As String, font As Font, textBounds As Rectangle, flags As TextFormatFlags, state As ComboBoxState)

Parameters

g

Graphics

The Graphics used to draw the text box.

bounds

Rectangle

The Rectangle that specifies the bounds of the text box.

comboBoxText

String

The String to draw in the text box.

font

Font

The Font to apply to comboBoxText.

textBounds

Rectangle

The Rectangle that specifies the bounds in which to draw comboBoxText.

flags

TextFormatFlags

A bitwise combination of the TextFormatFlags values.

state

ComboBoxState

One of the ComboBoxState values that specifies the visual state of the text box.

Exceptions

InvalidOperationException

The operating system does not support visual styles.

-or-

Visual styles are disabled by the user in the operating system.

-or-

Visual styles are not applied to the client area of application windows.

Remarks

Before calling this method, you should verify that the IsSupported property returns true.