Questions on UI for WPF Forum

13 answers

432 views

Hi

I am building a custom polyline tool, all I want is to add points and have a preview of the line that is going to be added (check the GIF to see what I am trying to achieve).

Here is the tool:

public class PolylineShapeTool : ToolBase, IMouseListener

{

private LineSegment _currentLineSegment;

private PathFigure _currentPathFigure;

private PathSegmentCollection _currentPathSegmentCollection;

private RadDiagramShape _currentShape;

public PolylineShapeTool()

: base("PolylineShapeTool")

{

}

private RadDiagram Diagram

{

get { return Graph as RadDiagram; }

}

public bool MouseDown(PointerArgs e)

{

return false;

}

public bool MouseDoubleClick(PointerArgs e)

{

return false;

}

public bool MouseMove(PointerArgs e)

{

if (IsActive && _currentShape != null)

{

if (_currentLineSegment != null)

{

var rect = CalculateRectFromBasePoint(e.TransformedPoint);

_currentLineSegment.Point = e.TransformedPoint;

_currentShape.Width = rect.Width;

_currentShape.Height = rect.Height;

}

return true;

}

return false;

}

public bool MouseUp(PointerArgs e)

{

if (IsActive)

{

_currentLineSegment = new LineSegment { Point = e.TransformedPoint };

if (_currentPathSegmentCollection == null)

{

_currentPathSegmentCollection = new PathSegmentCollection();

_currentPathFigure = new PathFigure

{

StartPoint = e.TransformedPoint,

Segments = _currentPathSegmentCollection,

IsFilled = false,

IsClosed = false

};

var pathGeometry = new PathGeometry { Figures = new PathFigureCollection { _currentPathFigure } };

_currentShape = new RadDiagramShape { Geometry = pathGeometry};

Diagram.AddShape(_currentShape);

}

_currentPathSegmentCollection.Add(_currentLineSegment);

_currentPathFigure.Segments = _currentPathSegmentCollection;

return true;

}

return false;

}

protected override void OnDeactivated()

{

base.OnDeactivated();

_currentShape = null;

_currentLineSegment = null;

_currentPathFigure = null;

_currentPathSegmentCollection = null;

}

private Rect CalculateRectFromBasePoint(Point transformedPoint)

{

var width = Math.Abs(_currentShape.X - transformedPoint.X);

var height = Math.Abs(_currentShape.Y - transformedPoint.Y);

var x = Math.Min(_currentShape.X, transformedPoint.X);

var y = Math.Min(_currentShape.Y, transformedPoint.Y);

return new Rect(x, y, width, height);

}

The problem is that it isn't working as expected, despite setting the StartPoint of the PathFigure, the first line starts at (0,0).
What do I have to change in this or how could I create such tool?

Why I don't use the Path tool? Because I don't need Bezier curves and there's no preview for the current line.

Diagram

answered on 13 Feb 2015

2 answers

158 views

[Solved] ControlPanelItem without GridViewSelectColumn

If followed the Telerik ControlPanelItem "Column chooser" example. It works perfect, though now I have two entries for the GridViewSelectColumn and GridViewToggleRowDetailsColumn which I don't want to display. Is there a way to remove those from the columns list?

GridView

answered on 13 Feb 2015

1 answer

340 views

Load offline map from tile package (tpk) file

Hello,

I have a local tile package file that has my basemap I can use in an offline application. A description of tile packages is given below:

http://resources.arcgis.com/en/help/runtime-wpf/concepts/index.html#/About_tile_packages/01700000004w000000/

Is it possible to have a custom map provider to be able to read this file and load it into the RadMap control? I did not find any existing examples doing this. Any help would be appreciated, thanks!

Map

answered on 13 Feb 2015

3 answers

361 views

Printing chart causes "No data to plot"

I am printing a WPF screen, using the PrintDialog.PrintVisual method. All of the bound controls on the screen print correctly except for the two Telerik controls - RadCartesianChart and RadPieChart. Both of these controls display the message "No data to plot" on the printout.

The data in the controls is bound to the datacontext; and displays correctly in the screen when displayed, the only issue is when printed. Would you expect bound Telerik controls to print correctly?

Thanks.

Chart

answered on 13 Feb 2015

3 answers

218 views

RadGridView inside Header Binding not set when expander collapsed.

Hi All

I have an issue with binding of a control which is inside header of a RadGridView which is in an Expander where Expander.IsExpanded
=False

<telerik:GridViewDataColumn.Header>

<CheckBox IsChecked="{Binding DataContext.MyProperty, RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}"/>

</telerik:GridViewDataColumn.Header>

When I set IsExpanded=True, binding to checkbox starts working as normal.

As a workaround I did this in code behind ..

Private Sub CheckBox_OnLoaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
            Dim chk As CheckBox = sender
            chk.DataContext = DataContext
            Dim b As Binding = New Binding("MyProperty")
            chk.SetBinding(CheckBox.IsCheckedProperty, b)
End Sub

This works, but I don't want to do this as its not great coding practice and any I will have to repeat this like 1000s time that I don't wanna do..

please tell me what options do I have here.

Thanks
M.

GridView

answered on 13 Feb 2015

12 answers

253 views

Exponential on X Axis

Hi,

I want to show Exponential on XAxis,how we can do, do you have any example?

second question,
Can we flip XAxis, like right side to left side.

Thanks

ChartView

answered on 13 Feb 2015

1 answer

133 views

Access DataContext from ShapeDataVirtualizer

I'm using virtualization in a RadMap. How can my ShapeDataVirtualizer class (based on IMapItemsVirtualizationSource) get to the DataContext object which is set on the parent Window?

Andrew

Map

answered on 13 Feb 2015

5 answers

472 views

Filtering on Date Only

I've read the documentation that explains how to filter on the Date value only from here:
http://docs.telerik.com/devtools/wpf/controls/radgridview/filtering/how-to/howto-filter-date-value

But my grid is using auto-generated columns. How do I get this work when I'm not declaring each individual column?

GridView