- Expose MoveRangeByRatio from the UI

src/Calculator/Views/GraphingCalculator/GraphingCalculator.xaml

@@ -57,6 +57,23 @@
             <local:EquationInputArea Grid.Row="0" Equations="{x:Bind ViewModel.Equations}"/>
 
             <StackPanel Grid.Row="1" Orientation="Vertical">
+                <TextBlock Text="Move Range By Ratio"/>
+                <Grid>
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition/>
+                        <ColumnDefinition/>
+                    </Grid.ColumnDefinitions>
+
+                    <TextBox x:Name="RatioXTextBox"
+                             Grid.Column="0"
+                             KeyDown="MoveRangeByRatioTextBox_KeyDown"
+                             PlaceholderText="RatioX"/>
+                    <TextBox x:Name="RatioYTextBox"
+                             Grid.Column="1"
+                             KeyDown="MoveRangeByRatioTextBox_KeyDown"
+                             PlaceholderText="RatioY"/>
+                </Grid>
+
                 <TextBlock Text="Scale Range"/>
                 <Grid>
                     <Grid.ColumnDefinitions>

src/Calculator/Views/GraphingCalculator/GraphingCalculator.xaml.cpp

@@ -24,7 +24,15 @@ using namespace Windows::UI::Xaml::Input;
 using namespace Windows::UI::Xaml::Media;
 using namespace Windows::UI::Xaml::Media::Imaging;
 
-constexpr auto sc_ViewModelPropertyName = L"ViewModel";
+namespace
+{
+    constexpr auto sc_ViewModelPropertyName = L"ViewModel";
+
+    double valFromTB(TextBox^ tb)
+    {
+        return stod(tb->Text->Data());
+    };
+}
 
 GraphingCalculator::GraphingCalculator()
 {
@@ -56,12 +64,6 @@ void GraphingCalculator::ScaleRangeTextBox_KeyDown(Object^ sender, KeyRoutedEven
 {
     if (e->Key == VirtualKey::Enter)
     {
-        auto valFromTB = [](TextBox^ tb)
-        {
-            wstring text = tb->Text->Data();
-            return stod(text);
-        };
-
         double centerX = valFromTB(CenterXTextBox);
         double centerY = valFromTB(CenterYTextBox);
         double scale = valFromTB(ScaleTextBox);
@@ -71,3 +73,16 @@ void GraphingCalculator::ScaleRangeTextBox_KeyDown(Object^ sender, KeyRoutedEven
         e->Handled = true;
     }
 }
+
+void GraphingCalculator::MoveRangeByRatioTextBox_KeyDown(Object^ sender, KeyRoutedEventArgs^ e)
+{
+    if (e->Key == VirtualKey::Enter)
+    {
+        double ratioX = valFromTB(RatioXTextBox);
+        double ratioY = valFromTB(RatioYTextBox);
+
+        Graph->MoveRangeByRatio(ratioX, ratioY);
+
+        e->Handled = true;
+    }
+}

src/Calculator/Views/GraphingCalculator/GraphingCalculator.xaml.h

@@ -23,6 +23,7 @@ namespace CalculatorApp
         void GraphingCalculator_DataContextChanged(Windows::UI::Xaml::FrameworkElement^ sender, Windows::UI::Xaml::DataContextChangedEventArgs^ args);
 
         void ScaleRangeTextBox_KeyDown(Platform::Object^ sender, Windows::UI::Xaml::Input::KeyRoutedEventArgs^ e);
+        void MoveRangeByRatioTextBox_KeyDown(Platform::Object^ sender, Windows::UI::Xaml::Input::KeyRoutedEventArgs^ e);
 
     private:
         CalculatorApp::ViewModel::GraphingCalculatorViewModel^ m_viewModel;

src/GraphControl/Control/Grapher.cpp

@@ -80,6 +80,20 @@ namespace GraphControl
         }
     }
 
+    void Grapher::MoveRangeByRatio(double ratioX, double ratioY)
+    {
+        if (m_graph)
+        {
+            if (auto renderer = m_graph->GetRenderer())
+            {
+                if (SUCCEEDED(renderer->MoveRangeByRatio(ratioX, ratioY)))
+                {
+                    m_renderMain->RunRenderPass();
+                }
+            }
+        }
+    }
+
     void Grapher::OnApplyTemplate()
     {
         auto swapChainPanel = dynamic_cast<SwapChainPanel^>(GetTemplateChild(StringReference(s_templateKey_SwapChainPanel)));

src/GraphControl/Control/Grapher.h

@@ -101,6 +101,7 @@ namespace GraphControl
         #pragma endregion
 
         void ScaleRange(double centerX, double centerY, double scale);
+        void MoveRangeByRatio(double ratioX, double ratioY);
 
     protected:
         #pragma region Control Overrides