Fix #933 (#1673)

* Add Disabled ComboBox with Hint to Demo

* Change Line to Path of DashedLine in ComboBox Template

* Delete Trigger of Height of TextBox

* revert "Delete Trigger of Height of TextBox"

Author: soi013

MainDemo.Wpf/TextFields.xaml

@@ -263,9 +263,17 @@
                 </smtx:XamlDisplay>
                 <smtx:XamlDisplay Key="fields_15" Margin="16 0 0 0">
                     <PasswordBox Password="01234" IsEnabled="False" MinWidth="72"/>
-                </smtx:XamlDisplay>
-            </StackPanel>
-        </StackPanel>
+            </smtx:XamlDisplay>
+            <smtx:XamlDisplay Key="fields_33">
+               <ComboBox
+                  IsEnabled="False"
+                  materialDesign:HintAssist.Hint="Disabled Combo with Hint"
+                  materialDesign:HintAssist.IsFloating="True" >
+                  <ComboBoxItem IsSelected="True">Selected</ComboBoxItem>
+               </ComboBox>
+            </smtx:XamlDisplay>
+         </StackPanel>
+      </StackPanel>
 
         <smtx:XamlDisplay Key="fields_16" Grid.Row="5" Grid.Column="1" Margin="0 8">
             <TextBox Style="{StaticResource MaterialDesignFloatingHintTextBox}" 

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.ComboBox.xaml

@@ -487,12 +487,19 @@
                             <wpf:PackIcon Margin="0" Kind="CloseCircle" />
                         </Button>
                     </StackPanel>
-                </Grid>
-                <Line x:Name="DashedLine" Grid.ColumnSpan="2" Grid.Column="0" VerticalAlignment="Bottom"
-                      Visibility="{Binding Path=IsEnabled, RelativeSource={RelativeSource Self}, Converter={StaticResource InverseBoolToVisConverter}}"
-                      StrokeThickness="{Binding BorderThickness.Bottom, ElementName=toggleButton, Converter={StaticResource DivisionMathConverter}, ConverterParameter=0.75}" StrokeDashArray="1,2.5" StrokeDashCap="Round"
-                      X1="0" X2="{Binding ActualWidth, ElementName=toggleButton}" Y1="0" Y2="0" 
-                      Stroke="{TemplateBinding BorderBrush}" Opacity="0.56" />
+            </Grid>
+            <Path x:Name="DashedLine"
+                  Grid.ColumnSpan="2"
+                  Grid.Column="0"
+                  VerticalAlignment="Bottom"
+                  Visibility="{Binding Path=IsEnabled, RelativeSource={RelativeSource Self}, Converter={StaticResource InverseBoolToVisConverter}}"
+                  Data="M 0,0 L 1,0"
+                  Stretch="Fill"
+                  StrokeThickness="{Binding BorderThickness.Bottom, ElementName=toggleButton, Converter={StaticResource DivisionMathConverter}, ConverterParameter=0.75}"
+                  StrokeDashArray="1,2.5"
+                  StrokeDashCap="Round"
+                  Stroke="{TemplateBinding BorderBrush}"
+                  Opacity="0.56" />
                 <wpf:Underline x:Name="Underline"
                                Grid.ColumnSpan="2"
                                wpf:TextFieldAssist.UnderlineBrush="{Binding Path=(wpf:TextFieldAssist.UnderlineBrush), RelativeSource={RelativeSource TemplatedParent}}"