Implementing-Real-Time-Preview-using-MAUI-Color-Picker-in-Drawing-Apps

This sample demonstrates how to implement real-time preview in a drawing app using the MAUI Color Picker in a .NET MAUI application.

Sample

    <Grid RowDefinitions="140,*">
        <StackLayout Orientation="Horizontal" HorizontalOptions="Center" Margin="15">

            <Border Stroke="Gray">

                <Border.StrokeShape>
                    <RoundRectangle CornerRadius="10" />
                </Border.StrokeShape>

                <Grid ColumnDefinitions="45,Auto" RowDefinitions="Auto,Auto,Auto" 
                      ColumnSpacing="50" Margin="15">

                    <!--Pen-->
                    <VerticalStackLayout Grid.Column="0" Grid.Row="0" HorizontalOptions="Center">
                        <Label Text="" FontFamily="MauiMaterialAssets" FontSize="20" 
                               HorizontalOptions="Center" VerticalOptions="Center">
                            <Label.GestureRecognizers>
                                <TapGestureRecognizer Tapped="PenGestureRecognizerTapped"/>
                            </Label.GestureRecognizers>
                        </Label>
                        <Label Text="Pen" HorizontalOptions="Center"/>
                    </VerticalStackLayout>

                    <!--Brush-->
                    <VerticalStackLayout Grid.Column="1" Grid.Row="0" HorizontalOptions="Center">
                        <Label Text="" FontFamily="MauiMaterialAssets" FontSize="20" 
                               HorizontalOptions="Center" VerticalOptions="Center">
                            <Label.GestureRecognizers>
                                <TapGestureRecognizer Tapped="BrushGestureRecognizerTapped"/>
                            </Label.GestureRecognizers>
                        </Label>
                        <Label Text="Brush" HorizontalOptions="Center"/>
                    </VerticalStackLayout>

                    <!--Reset-->
                    <VerticalStackLayout Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2" 
                                         HorizontalOptions="Center">
                        <Label Text="" FontFamily="MauiMaterialAssets" FontSize="20" 
                               HorizontalOptions="Center" VerticalOptions="Center">
                            <Label.GestureRecognizers>
                                <TapGestureRecognizer Tapped="ResetTapped"/>
                            </Label.GestureRecognizers>
                        </Label>
                        <Label Text="Reset" HorizontalOptions="Center"/>
                    </VerticalStackLayout>

                </Grid>
            </Border>

            <!--Color Picker-->
            <Border Stroke="Gray">
                <Border.StrokeShape>
                    <RoundRectangle CornerRadius="10" />
                </Border.StrokeShape>
                <VerticalStackLayout Margin="5,10,5,5">
                    <inputs:SfColorPicker x:Name="colorPicker" ColorMode="Palette"  
                            PaletteRowCount="2" PaletteRowSpacing="5"
                            PaletteColumnSpacing="5" ShowRecentColors="False" 
                            IsColorModeSwitcherVisible="False" IsInline="True" />
                </VerticalStackLayout>
            </Border>

        </StackLayout>

        <!--Drawing Pad-->
        <Border Grid.Row="1" StrokeThickness="1" Stroke="Gray" Margin="15,0,15,15">
            <Border.StrokeShape>
                <RoundRectangle CornerRadius="10"/>
            </Border.StrokeShape>

            <signaturePad:SfSignaturePad x:Name="signaturePad" Background ="Transparent"
                          StrokeColor="{Binding Source={x:Reference colorPicker}, Path=SelectedColor}"/>
        </Border>

    </Grid>

Requirements to run the demo

To run the demo, refer to System Requirements for .NET MAUI

Troubleshooting:

Path too long exception

If you are facing path too long exception when building this example project, close Visual Studio and rename the repository to short and build the project.

License

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