CanExecute Method

Defines the method that determines whether the action can execute in its current state.

Syntax

Visual Basic
C#

'Declaration
 
Function CanExecute( _
   ByVal target As Object _
) As Boolean

'Usage
 
Dim instance As ITouchBarAction
Dim target As Object
Dim value As Boolean
 
value = instance.CanExecute(target)

bool CanExecute( 
   object target
)

Parameters

target: The target System.Object to execute this action.

Return Value

true if this action can be executed; otherwise, false.

Example

This example creates touch toolbar buttons.

public class SelectAction : GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction
        {

            public bool CanExecute(object target)
            {
                GrapeCity.Win.Spread.InputMan.CellType.EditBase owner = target;
                if (owner == null)
                {
                    return false;
                }
                return true;
            }

            public void Execute(object target)
            {
                GrapeCity.Win.Spread.InputMan.CellType.EditBase owner = target;
                owner.SelectAll();
            }
        }

        public class DeselectAction : GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction
        {

            public bool CanExecute(object target)
            {
                GrapeCity.Win.Spread.InputMan.CellType.EditBase owner = target;
                if (owner == null)
                {
                    return false;
                }
                return true;
            }

            public void Execute(object target)
            {
                GrapeCity.Win.Spread.InputMan.CellType.EditBase owner = target;                
                owner.DeselectAll();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarButton selectBtn = new GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarButton(new SelectAction(), "test1", null);
            GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarButton deselectBtn = new GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarButton(new DeselectAction(), "test2", null);
            GrapeCity.Win.Spread.InputMan.CellType.GcTextBoxCellType imtc = new GrapeCity.Win.Spread.InputMan.CellType.GcTextBoxCellType();
            imtc.ShowTouchToolBar = GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarDisplayOptions.TapSelection | GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarDisplayOptions.TapGripper;
            imtc.TouchToolBar.Items.Clear();
            imtc.TouchToolBar.Items.AddRange(new ToolStripItem[] {
        selectBtn,
        new ToolStripSeparator(),
        deselectBtn
    });
            fpSpread1.ActiveSheet.Columns[0].CellType = imtc;           
        }

VB.NET

Public Class SelectAction
        Implements GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction

        Public Function CanExecute(target As Object) As Boolean Implements GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction.CanExecute
            Dim owner As GrapeCity.Win.Spread.InputMan.CellType.EditBase = target
            If owner Is Nothing Then
                Return False
            End If
            Return True
        End Function

        Public Sub Execute(target As Object) Implements GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction.Execute
            Dim owner As GrapeCity.Win.Spread.InputMan.CellType.EditBase = target
            owner.SelectAll()
        End Sub
    End Class

    Public Class DeselectAction
        Implements GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction

        Public Function CanExecute(target As Object) As Boolean Implements GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction.CanExecute
            Dim owner As GrapeCity.Win.Spread.InputMan.CellType.EditBase = target
            If owner Is Nothing Then
                Return False
            End If
            Return True
        End Function

        Public Sub Execute(target As Object) Implements GrapeCity.Win.Spread.InputMan.CellType.ITouchBarAction.Execute
            Dim owner As GrapeCity.Win.Spread.InputMan.CellType.EditBase = target
            owner.DeselectAll()
        End Sub
    End Class

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim selectBtn As New GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarButton(New SelectAction(), "test1", Nothing)
        Dim deselectBtn As New GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarButton(New DeselectAction(), "test2", Nothing)
        Dim imtc As New GrapeCity.Win.Spread.InputMan.CellType.GcTextBoxCellType()
        imtc.ShowTouchToolBar = GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarDisplayOptions.TapSelection Or GrapeCity.Win.Spread.InputMan.CellType.TouchToolBarDisplayOptions.TapGripper
        imtc.TouchToolBar.Items.Clear()
        imtc.TouchToolBar.Items.AddRange(New ToolStripItem() {selectBtn, New ToolStripSeparator(), deselectBtn})
        FpSpread1.ActiveSheet.Columns(0).CellType = imtc
    End Sub
End Class

Requirements

Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows Server 2012 R2, Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10

Reference

ITouchBarAction Interface
ITouchBarAction Members