Spread Windows Forms 15.0
Spread Windows Forms 15.0 Product Documentation / Developer's Guide / Customizing Interaction in Cells / Using Visible Indicators in the Cell / Customizing the Focus Indicator for a Cell
In This Topic
    Customizing the Focus Indicator for a Cell
    In This Topic

    The focus rectangle indicates to the end user the selected and active cell. By default, when a cell is selected the cell has a solid focus rectangle as shown in the figure below. If an entire column (or row) is selected, the column (or row) is highlighted, also as shown. The column and row header of the active cell also have a different background color.

    Focus Rectangle for Single Cell

    Focus Rectangle for Column Selected

    Focus indicator for selected individual cell Focus indicator for selected column

    You can customize the focus indicator for the active cell by using the FocusRenderer property of the Spread component (which uses the IFocusIndicatorRenderer interface). For animated indicators, you need the IAnimatedFocusIndicatorRenderer interface. You can also change the selected background color of the active cell headers.

    This table summarized the types of focus indicators and the classes that correspond to them.

    Type Class
    Default DefaultFocusIndicatorRenderer
    Animated AnimatedDefaultFocusIndicatorRenderer
    Custom Line CustomFocusIndicatorRenderer
    Editing EditingFocusIndicatorRenderer
    Enhanced EnhancedFocusIndicatorRenderer
    Image ImageFocusIndicatorRenderer
    Marquee Line MarqueeFocusIndicatorRenderer
    Solid Line SolidFocusIndicatorRenderer
    Flat FlatFocusIndicatorRenderer

    The DefaultFocusIndicatorRenderer is the base class for the others. The ImageFocusIndicatorRenderer allows you to use an image as the focus indicator. The SolidFocusIndicatorRenderer allows you to customize a solid border around the selected cell as a focus indicator.

    In the Spread Designer, you can customize the focus indicator with the Focus Indicator Editor. For more information about using the Spread Designer, refer to the Focus Indicator Editor topic in the Spread Designer Guide.

    Using Code

    Use the IFocusIndicatorRenderer interface to create custom indicators for the active cell.


    This example creates a custom focus indicator for the active cell.

    Copy Code
    FarPoint.Win.Spread.SolidFocusIndicatorRenderer sfir =new FarPoint.Win.Spread.SolidFocusIndicatorRenderer(Color.Blue, 2);
    fpSpread1.FocusRenderer = sfir;
    // Create a custom indicator.
    public class MyIndicator : FarPoint.Win.Spread.IFocusIndicatorRenderer
    public void Paint(System.Drawing.Graphics g, int x, int y, int width, int height, bool left, bool top, bool right, bool bottom)
    SolidBrush r = new SolidBrush(System.Drawing.Color.Red);
    SolidBrush b = new SolidBrush(System.Drawing.Color.Blue);
    SolidBrush gr = new SolidBrush(System.Drawing.Color.DarkGreen);
    g.FillRectangle(r, x, y, 1, height);
    g.FillRectangle(gr, x, y, width, 1);
    g.FillRectangle(r, x + width - 1, y, 1, height);
    g.FillRectangle(b, x, y + height - 1, width, 1);
    fpSpread1.FocusRenderer = new MyIndicator();
    Copy Code
    Dim sfir As New FarPoint.Win.Spread.SolidFocusIndicatorRenderer(Color.Blue, 2)
    fpSpread1.FocusRenderer = sfir
    ' Create a custom indicator
    Public Class MyIndicator
    Implements FarPoint.Win.Spread.IFocusIndicatorRenderer
    Public Sub Paint(ByVal g As System.Drawing.Graphics, ByVal x As Integer, ByVal y As Integer, ByVal width As Integer, ByVal height As Integer, ByVal left As Boolean, ByVal top As Boolean, ByVal right As Boolean, ByVal bottom As Boolean) Implements FarPoint.Win.Spread.IFocusIndicatorRenderer.Paint
    Dim r As New SolidBrush(Color.Red)
    Dim b As New SolidBrush(Color.Blue)
    Dim gr As New SolidBrush(Color.DarkGreen)
    g.FillRectangle(r, x, y, 1, height)
    g.FillRectangle(gr, x, y, width, 1)
    g.FillRectangle(r, x + width - 1, y, 1, height)
    g.FillRectangle(b, x, y + height - 1, width, 1)
    End Sub
    End Class
    fpSpread1.FocusRenderer = New MyIndicator()

    Using the Spread Designer

    1. Select the Format menu option.
    2. Choose the Focus Indicator Editor menu.
    3. Make changes to the dialog and select OK.

    Using Code

    Use the SelectedBackgroundColor property of the EnhancedColumnHeaderRenderer (or row) to set the header backcolor of the active cell.


    This example changes the header background color for the active cell.

    Copy Code
    FarPoint.Win.Spread.CellType.EnhancedColumnHeaderRenderer testing = new FarPoint.Win.Spread.CellType.EnhancedColumnHeaderRenderer();
    testing.SelectedBackgroundColor = Color.MediumTurquoise;
    FarPoint.Win.Spread.CellType.EnhancedRowHeaderRenderer testing1 = new FarPoint.Win.Spread.CellType.EnhancedRowHeaderRenderer();
    testing1.SelectedBackgroundColor = Color.MediumTurquoise;
    fpSpread1.Sheets[0].ColumnHeader.DefaultStyle.Renderer = testing;
    fpSpread1.Sheets[0].RowHeader.DefaultStyle.Renderer = testing1;
    Copy Code
    Dim testing as New FarPoint.Win.Spread.CellType.EnhancedColumnHeaderRenderer
    testing.SelectedBackgroundColor = Color.MediumTurquoise
    Dim testing1 as New FarPoint.Win.Spread.CellType.EnhancedRowHeaderRenderer
    testing1.SelectedBackgroundColor = Color.MediumTurquoise
    fpSpread1.Sheets(0).ColumnHeader.DefaultStyle.Renderer = testing
    fpSpread1.Sheets(0).RowHeader.DefaultStyle.Renderer = testing1
    See Also