plexityhide: April 2010

Thursday, April 22, 2010

Marking up certain days in the datescaler, Silverlight and WPF

Implement the event OnTextOutOverride, look at the code below where I mark up the 5:th of March, make Sundays red, and append “a.d” behind each year

   1: void dateScalerHorizontal_OnTextOutOverride(object sender, PlexityHide.GTP.TextOutOverrideArgs e)

   2: {

   3:     if (CBRedSundays.IsChecked==true)

   4:     {

   5:         if ((!e.IsUpperBand && e.Resolution == TimeResolution.days) && e.Time.DayOfWeek == DayOfWeek.Sunday)

   6:         {

   7:             e.TextBlock.FontWeight = FontWeights.ExtraBold;

   8:             e.TextBlock.Foreground = new SolidColorBrush(Colors.Red);

   9:         }

  10:     }

11:

  12:     if (e.Resolution == TimeResolution.years)

  13:     {

  14:         e.TextBlock.Text = e.Time.Year.ToString() + "A.D.";

  15:     }

16:

  17:     if (CBBirthday.IsChecked==true)

  18:     {

  19:         if (e.Time.Month == 3 && e.Time.Day == 5)

  20:         {

  21:             e.ReturnCanvasToUseInstead = new Canvas();

  22:             Ellipse ellipse = new Ellipse();

  23:             ellipse.Height = 20;

  24:             ellipse.Width = 20;

  25:             ellipse.StrokeThickness = 2;

  26:             ellipse.Stroke = new SolidColorBrush(Colors.Green);

  27:             ellipse.Fill = new SolidColorBrush(Colors.Yellow);

  28:             TranslateTransform trt = new TranslateTransform();

  29:             trt.X = -6;

  30:             trt.Y = -6;

  31:             ellipse.RenderTransform = trt;

  32:             e.ReturnCanvasToUseInstead.Children.Add(ellipse);

  33:             e.ReturnCanvasToUseInstead.Children.Add(e.TextBlock); // Adding the original text to our canvas

34:

  35:             TextBlock tb = new TextBlock();

  36:             tb.Text = "My birthday! Sure hope I get cake...";

  37:             e.ReturnCanvasToUseInstead.Children.Add(tb);

  38:             TranslateTransform trt2 = new TranslateTransform();

  39:             trt2.X = 10;

  40:             trt2.Y = -20;

  41:             tb.RenderTransform = trt2;

42:

  43:         }

  44:     }

45:

46:

  47: }

# posted by Hans Karlsen @ 12:17 PM 16 Comments

Wednesday, April 21, 2010

In GTP.NET for Silverlight and WPF, how to stop a move to avoid collision

This is one way to stop a move that will cause a collision:

   1: private void GanttRow_OnTimeItemChange(object sender, OnTimeItemChangeArgs e)

   2: {

   3:     if (e.MoveState == MoveState.move)

   4:     {

   5:         DateTime newstart=e.TimeItem.Start+e.Diff;

   6:         DateTime newstop=e.TimeItem.Stop+e.Diff;

   7:         foreach(GanttRowItem gri in e.TimeItem.GanttRow.InternalIndexOfContent)

   8:         {

   9:             if (newstart<gri.TimeItem.Stop && newstop>gri.TimeItem.Start && gri.TimeItem!=e.TimeItem)

  10:             {

  11:                 // collision

  12:                 e.Allow=false;

  13:                 return;

  14:             }

15:

  16:         }

  17:     }

  18: }

# posted by Hans Karlsen @ 12:16 PM 0 Comments

Stealing the scrollbar

If you want to have the scrollbar to the right of the time item area, you can achieve with very little effort.

In this samples I added some panels and gave them color so that they would be visible. The yellow panel to the right is were I want my scrollbar.

Like this:

And the code that does the trick:

   1: private void button1_Click(object sender, EventArgs e)

   2: {

   3:     // Hi jack the Scrollbar to a new owner, and position it

   4:     gantt1.Grid.ScrollbarNodes.Parent = panelToHoldScroller;

   5:     gantt1.Grid.ScrollbarNodes.Top = 0;

   6:     gantt1.Grid.ScrollbarNodes.Left = 0;

   7:     // Catch all resize of the grid ...

   8:     gantt1.Grid.Resize += new EventHandler(Grid_Resize);

   9: }

10:

  11: void Grid_Resize(object sender, EventArgs e)

  12: {

  13:     //... and update position if we are hi-jacked that is

  14:     if (gantt1.Grid.ScrollbarNodes.Parent == panelToHoldScroller)

  15:     {

  16:         gantt1.Grid.ScrollbarNodes.Top = 0;

  17:         gantt1.Grid.ScrollbarNodes.Left = 0;

  18:     }

19:

  20: }

# posted by Hans Karlsen @ 10:40 AM 1 Comments

Filter away exceptions

In Eco the OCL parser uses exceptions to abort operations that fails. Since the different levels in the parsing logic catch this exception, acts on it and then throws it again, you normally get not 1 but 5 halts for every error discovered (it halts on throw).

I have started to mask away these messages by adding the exception to the visual studio exception dialog like this.

# posted by Hans Karlsen @ 12:47 AM 0 Comments

Sunday, April 18, 2010

Better Silverlight and WPF performance

I been working on performance for the GTP.NET.SL products for Silverlight and WPF.

I also took the Microsoft FamilyShow sample as a base and created some new WPF samples:

This sample also show skinning by the use of DynamicResources:

The main performance gain was by avoiding to resize UIElements that will not currently show on screen.

# posted by Hans Karlsen @ 12:02 PM 0 Comments

Monday, April 12, 2010

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# posted by Hans Karlsen @ 9:20 AM 0 Comments