Category Archives: GTP.NET.Silverlight FAQ

11557 : OnGanttRowMinHeightChange

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If you want your GanttRow to increase in height to make room for collided time items; read on.

 

Your row looks something like this:

<HierarchicalDataTemplate  x:Key=”RowInfoTemplate”  ItemsSource=”{Binding SubNodes}” ItemTemplate=”{StaticResource SubRowInfoTemplate}”>
        <Grid  MinHeight=”25″>
            <Grid.ColumnDefinitions>
                <ColumnDefinition ></ColumnDefinition>
                <ColumnDefinition ></ColumnDefinition>
            </Grid.ColumnDefinitions>
            <ph:TreeViewMultiColumnRow MultiColumnCoordinator=”{Binding Source={StaticResource MCC}}” LevelReduce=”16″>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition></ColumnDefinition>
                    <ColumnDefinition></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <TextBlock Text=”{Binding Text}” Grid.Column=”0″></TextBlock>
                <TextBlock Text=”{Binding Text}” Grid.Column=”1″></TextBlock>
            </ph:TreeViewMultiColumnRow>
                <Canvas >
                    <ph:GanttRow 
                        FollowDateScalerPosition=”True”
                        Canvas.Top=”-3″ BorderThickness=”0″ Background=”Transparent”
                        IncreaseRow_StartHeight =”30″ IncreaseRowHeightOnCollision=”True” CollisionTimeItemOffset=”20″
                        ItemsSource=”{Binding Items}” ItemTemplate=”{StaticResource SpanTimeItem}” 
                        OnUserDrawTimeItem=”GanttRow_OnUserDrawTimeItem” 
                        OnGanttRowMinHeightChange=”GanttRow_OnGanttRowMinHeightChange”></ph:GanttRow>
                </Canvas>
        </Grid>
    </HierarchicalDataTemplate>

Notice the the GanttRow is enclosed in a Canvas to allow it to follow the datescaler.
The GanttRow will increase in MinHeight since the IncreaseRowHeightOnCollision=”True”, but the canvas will not care, since a canvas does not care how big its content is.

So I implemented the OnGanttRowMinHeightChange event:

        private void GanttRow_OnGanttRowMinHeightChange(object sender, OnGanttRowMinHeightChangeArgs e)
        {
            (e.GanttRow.Parent as Canvas).MinHeight=e.NewHeight;
        }
Now the Canvas increased MinHeight will force to enclosing Grid to Increase height…

 

11432 : Scrollbar for all GanttRows

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Question

 

I used your toolkit tree view example as a basis for this but I have set the tree view’s height to auto so as to use the whole screen – but now I have lost the scroll bar on the right. Can I have full screen and a toolbar?

 

Answer

< ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> 

You can do this many ways I guess. One way:

                    <ScrollViewer 

                        Name=”_myscrollview”

                        Grid.Row=”1″

                        Grid.Column=”0″

                        Grid.ColumnSpan=”3″

                        Height=”300″

                        VerticalScrollBarVisibility=”Visible”>

                        <ScrollViewer.Content>

                        <controls:TreeView  

                        BorderThickness=”0″

                        Margin=”0″

                        x:Name=”treeview1″

                        ItemTemplate=”{StaticResource SubRowInfoTemplate}”

                        Background=”Transparent” />

                    </ScrollViewer.Content></ScrollViewer>

 

Then add a event handler:

        private void LayoutRoot5_SizeChanged(object sender, SizeChangedEventArgs e)

        {

            _myscrollview.Height = e.NewSize.Height-100;

        }

 

There is probably some smarter way to this in xaml (there always is it seems… J)

11431 : Is there any way to show a background line between the days

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Question

 

Is there any way to show a background line between the days? Maybe even hours/minutes depending on scale?< ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

 

Answer

You can do things like that by using the events, this code draws a line each day:

        void gantt1_OnDrawBackground(object sender, GanttUserDrawArgs e)

        {

            e.Canvas.Children.Clear();

            DateTime aDate=gantt10.DateScaler.StartTime;

            aDate=aDate.Date; // only keep date part

            while (aDate<gantt10.DateScaler.StopTime)

            {

                Line line = new Line();

                e.Canvas.Children.Add(line);

                line.X1 = gantt10.DateScaler.TimeToPixel(aDate);

                line.X2 = line.X1;

                line.Y1 = 0;

                line.Y2 = gantt10.ActualHeight;

                line.Stroke = new SolidColorBrush(Colors.Black);

                line.StrokeThickness = 1;

                aDate=aDate.AddDays(1);

            }

        }

11433 : Position texts before and and after a time item

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Question

Howto get textblocks to appear before and after the TimeItem?

Answer

In this time item the Grid with name Rect is the one that gets the size based on Start and Stop datetime values.

The Text after the time item is the one named Text1, the one infront is Text2.

Text1 is positioned in the event implementation: SizeChanged=”TimeItem_SizeChanged” see impl at the bottom

Text2 is positioned with a Translate transform with a negative value.

        <DataTemplate x:Name=”SquaredTimeItem”>< ?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

            <l:TimeItem Height=”20″

                Start=”{Binding Start,Mode=TwoWay}”

                Stop=”{Binding Stop,Mode=TwoWay}”

                Identity=”{Binding Id}”

                TimeItemSizedFrameworkElementName=”Rect” SizeChanged=”TimeItem_SizeChanged”>

 

                <Grid Height=”20″ Name=”Rect”>

                    <Border  BorderBrush=”Black” BorderThickness=”0″ CornerRadius=”3″>

                        <Border.Background>

                            <LinearGradientBrush>

                                <LinearGradientBrush.GradientStops>

                                    <GradientStop Offset=”0″ Color=”LightGray”/>

                                    <GradientStop Offset=”1″ Color=”Gray”/>

                                </LinearGradientBrush.GradientStops>

                            </LinearGradientBrush>

                        </Border.Background>

                    </Border>

                </Grid>

                <TextBlock Name=”Text1″ HorizontalAlignment=”Right” Margin=”3,6,0,0″ Text=”{Binding To}” >

                            <TextBlock.RenderTransform>

                                <TranslateTransform X=”20″></TranslateTransform>

                            </TextBlock.RenderTransform>

                </TextBlock>

                <TextBlock Name=”Text2″ HorizontalAlignment=”Left” Margin=”3,6,0,0″ Text=”{Binding From}” >                           

                            <TextBlock.RenderTransform>

                                <TranslateTransform X=”-25″></TranslateTransform>

                            </TextBlock.RenderTransform>

                </TextBlock>

 

            </l:TimeItem>

        </DataTemplate>

 

        private void TimeItem_SizeChanged(object sender, SizeChangedEventArgs e)

        {

            if (sender is TimeItem)

            {

                TextBlock tb1=(sender as TimeItem).FindName(“Text1″) as TextBlock;

                (tb1.RenderTransform as TranslateTransform).X = e.NewSize.Width + 10;

            }

        }

 

GTP.NET.SL 1.0.2.15

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——————————————
——-GTP.NET.SL 1.0.2.15—-
——————————————
***************** Doc *****************
User: Hasse Date: 09-02-04 Time: 14:38
Added LICENSE.GTP.NET.SL.rtf

***************** Doc *****************
User: Hasse Date: 09-02-04 Time: 14:38
Added info.mht

***************** Doc *****************
User: Hasse Date: 09-02-04 Time: 14:38
Added gettingstarted.mht

***************** Doc *****************
User: Hasse Date: 09-02-04 Time: 14:38
Added GettingStarted.dxc

***************** Gantt *****************
User: Hasse Date: 09-01-31 Time: 21:28
Added LicenseCheckCall.cs

***************** ClientBin *****************
User: Hasse Date: 09-01-23 Time: 12:54
Deleted placeholder.txt

***************** Doc *****************
User: Hasse Date: 09-01-21 Time: 10:58
Added GTP.NET.SL.dxp

***************** Doc *****************
User: Hasse Date: 09-01-21 Time: 10:58
Added GTP.NET.SL.dxc

***************** Version 14 *****************
User: Hasse Date: 09-01-21 Time: 10:58
Added Doc

***************** GanttRow.cs *****************
***************** GTP.NET.SL.csproj *****************
***************** TimeItem.cs *****************
User: Hasse Date: 09-01-18 Time: 20:36
Checked in $/ph.NET/Components/GTP.NET.SL/Gantt
Comment:
UserDraw

***************** SLDev1 *****************
***************** SLDev1 *****************
User: Hasse Date: 09-01-18 Time: 20:25
Added SampleUsingToolkitTreeview.xaml

***************** MoveBetweenControls.xaml *****************
***************** MoveBetweenControls.xaml.cs *****************
***************** SampleChoose.xaml *****************
***************** TimeItem.cs *****************
***************** TimeItemLink.cs *****************
***************** TODOS.txt.txt *****************
***************** tankar.txt *****************
***************** Gantt.cs *****************
***************** GanttRow.cs *****************
User: Hasse Date: 09-01-18 Time: 17:01
Checked in $/ph.NET/Components/GTP.NET.SL/Gantt
Comment:
Cleans up links when removing time items