Hello Mher,
Another approach which you can consider is reteplating the Axis which needs modifying. This may look something like this:
<Style
TargetType="telerik:AxisX2D" >
<Setter Property="Template" >
<Setter.Value>
<ControlTemplate TargetType="telerik:AxisX2D">
<Grid Margin="{TemplateBinding Margin}">
<Grid.RowDefinitions>
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
<RowDefinition Height="auto" />
</Grid.RowDefinitions>
<Line x:Name="PART_AxisLine"
dragDrop:RadDragAndDropManager.AllowDrop="True"
StrokeThickness="20"
Grid.Row="{TemplateBinding InnerPosition}"
MouseMove="PART_AxisLine_MouseEnter"
MouseLeave="PART_AxisLine_MouseLeave"
Style="{TemplateBinding AxisLineStyle}"
VerticalAlignment="{TemplateBinding AxisLineAlignment}" />
<ItemsPresenter Grid.Row="{TemplateBinding InnerPosition}" Visibility="{TemplateBinding AxisTicksVisibility}" />
<telerik:VerticalMinorTicks2D x:Name="PART_MinorTickPoints"
Grid.Row="{TemplateBinding InnerPosition}"
Visibility="{TemplateBinding AxisMinorTicksVisibility}"
VerticalAlignment="{TemplateBinding AxisLineAlignment}" />
<telerik:HorizontalAxisLabels2D Grid.Row="2" x:Name="PART_AxisLabels" Visibility="{TemplateBinding AxisLabelsVisibility}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
<Setter Property="ItemsPanel" >
<Setter.Value>
<ItemsPanelTemplate >
<telerik:AxisXPanel />
</ItemsPanelTemplate>
</Setter.Value>
</Setter>
</Style>
Essentially, this style will only allow drop on the xAxis. However, since the drag/drop manager supresses mouse enter/leave events on the elements in the controls, you cannot style the axis once you hover over it.
All the best,
Yavor
the Telerik team
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