Persist variable settings after graph is plotted (#1055)

* Allow copying graph as image

* Persist variables

* Revert "Allow copying graph as image"

This reverts commit 4fc9d798bc5f3ff82efc4fb00140103213fb81e2.

* fix binding bug

* undo cert change

* fix animation

* remove extra lines

* remove overrides

* undo key comment

src/CalcViewModel/GraphingCalculator/GraphingCalculatorViewModel.cpp

@@ -10,6 +10,7 @@ using namespace Platform::Collections;
 using namespace Windows::Foundation;
 using namespace Windows::Foundation::Collections;
 using namespace Windows::UI::Xaml::Data;
+using namespace GraphControl;
 
 namespace CalculatorApp::ViewModel
 {
@@ -24,12 +25,12 @@ namespace CalculatorApp::ViewModel
     {
     }
 
-    void GraphingCalculatorViewModel::UpdateVariables(IMap<String ^, double> ^ variables)
+    void GraphingCalculatorViewModel::UpdateVariables(IMap<String ^, Variable ^> ^ variables)
     {
         Variables->Clear();
-        for (auto var : variables)
+        for (auto variablePair : variables)
         {
-            auto variable = ref new VariableViewModel(var->Key, var->Value);
+            auto variable = ref new VariableViewModel(variablePair->Key, variablePair->Value);
             variable->VariableUpdated += ref new EventHandler<VariableChangedEventArgs>([this, variable](Object ^ sender, VariableChangedEventArgs e) {
                 VariableUpdated(variable, VariableChangedEventArgs{ e.variableName, e.newValue });
             });

src/CalcViewModel/GraphingCalculator/GraphingCalculatorViewModel.h

@@ -24,7 +24,7 @@ namespace CalculatorApp::ViewModel
 
         event Windows::Foundation::EventHandler<VariableChangedEventArgs> ^ VariableUpdated;
 
-        void UpdateVariables(Windows::Foundation::Collections::IMap<Platform::String ^, double> ^ variables);
+        void UpdateVariables(Windows::Foundation::Collections::IMap<Platform::String ^, GraphControl::Variable ^> ^ variables);
 
         void SetSelectedEquation(EquationViewModel ^ equation);
     private:

src/CalcViewModel/GraphingCalculator/VariableViewModel.h

@@ -18,47 +18,89 @@ public
     [Windows::UI::Xaml::Data::Bindable] public ref class VariableViewModel sealed : public Windows::UI::Xaml::Data::INotifyPropertyChanged
     {
     public:
-        VariableViewModel(Platform::String ^ name, double value)
+        VariableViewModel(Platform::String ^ name, GraphControl::Variable ^ variable)
             : m_Name(name)
-            , m_Value(value)
+            , m_variable{ variable }
             , m_SliderSettingsVisible(false)
-            , m_Min(0.0)
-            , m_Step(0.1)
-            , m_Max(2.0)
         {
         }
 
         OBSERVABLE_OBJECT();
         OBSERVABLE_PROPERTY_R(Platform::String ^, Name);
-        OBSERVABLE_PROPERTY_RW(double, Min);
-        OBSERVABLE_PROPERTY_RW(double, Step);
-        OBSERVABLE_PROPERTY_RW(double, Max);
         OBSERVABLE_PROPERTY_RW(bool, SliderSettingsVisible);
 
+        property double Min
+        {
+            double get()
+            {
+                return m_variable->Min;
+            }
+            void set(double value)
+            {
+                if (m_variable->Min != value)
+                {
+                    m_variable->Min = value;
+                    RaisePropertyChanged("Min");
+                }
+            }
+        }
+
+        property double Step
+        {
+            double get()
+            {
+                return m_variable->Step;
+            }
+            void set(double value)
+            {
+                if (m_variable->Step != value)
+                {
+                    m_variable->Step = value;
+                    RaisePropertyChanged("Step");
+                }
+            }
+        }
+
+        property double Max
+        {
+            double get()
+            {
+                return m_variable->Max;
+            }
+            void set(double value)
+            {
+                if (m_variable->Max != value)
+                {
+                    m_variable->Max = value;
+                    RaisePropertyChanged("Max");
+                }
+            }
+        }
+
         event Windows::Foundation::EventHandler<VariableChangedEventArgs> ^ VariableUpdated;
 
         property double Value
         {
             double get()
             {
-                return m_Value;
+                return m_variable->Value;
             }
             void set(double value)
             {
-                if (value < Min)
+                if (value < m_variable->Min)
                 {
-                    Min = value;
+                    m_variable->Min = value;
                     RaisePropertyChanged(L"Min");
                 }
-                else if (value > Max)
+                else if (value > m_variable->Max)
                 {
-                    Max = value;
+                    m_variable->Max = value;
                     RaisePropertyChanged(L"Max");
                 }
 
-                if (Value != value)
+                if (m_variable->Value != value)
                 {
-                    m_Value = value;
+                    m_variable->Value = value;
                     VariableUpdated(this, VariableChangedEventArgs{ Name, value });
                     RaisePropertyChanged(L"Value");
                 }
@@ -66,6 +108,6 @@ public
         }
 
     private:
-        double m_Value;
+        GraphControl::Variable ^ m_variable;
     };
 }

src/Calculator/Views/GraphingCalculator/EquationInputArea.xaml

@@ -132,11 +132,11 @@
                                     Margin="8,0,8,-6"
                                     VerticalAlignment="Center"
                                     DataContext="{x:Bind}"
-                                    Maximum="{x:Bind Max, Mode=TwoWay}"
-                                    Minimum="{x:Bind Min, Mode=TwoWay}"
                                     StepFrequency="{x:Bind Step, Mode=TwoWay}"
                                     ValueChanged="Slider_ValueChanged"
-                                    Value="{x:Bind Value, Mode=TwoWay}"/>
+                                    Value="{x:Bind Value, Mode=TwoWay}"
+                                    Maximum="{x:Bind Max, Mode=TwoWay}"
+                                    Minimum="{x:Bind Min, Mode=TwoWay}"/>
 
                             <Grid Grid.Row="1"
                                   Padding="8,0,8,8"
@@ -882,10 +882,11 @@
                             <Setter Property="Margin" Value="1,0,1,0"/>
                         </Style>
                     </ListView.ItemContainerStyle>
+                    <ListView.ItemContainerTransitions>
+                        <TransitionCollection/>
+                    </ListView.ItemContainerTransitions>
                     <ListView.Transitions>
-                        <TransitionCollection>
+                        <TransitionCollection/>
-                            <AddDeleteThemeTransition/>
-                        </TransitionCollection>
                     </ListView.Transitions>
                 </ListView>
             </StackPanel>

src/GraphControl/Control/Grapher.cpp

@@ -442,9 +442,9 @@ namespace GraphControl
         {
             critical_section::scoped_lock lock(m_renderMain->GetCriticalSection());
 
-            for (auto variable : Variables)
+            for (auto variablePair : Variables)
             {
-                graph->SetArgValue(variable->Key->Data(), variable->Value);
+                graph->SetArgValue(variablePair->Key->Data(), variablePair->Value->Value);
             }
         }
     }
@@ -470,7 +470,7 @@ namespace GraphControl
 
     void Grapher::UpdateVariables()
     {
-        auto updatedVariables = ref new Map<String ^, double>();
+        auto updatedVariables = ref new Map<String ^, Variable ^>();
 
         if (m_graph)
         {
@@ -483,12 +483,19 @@ namespace GraphControl
                     auto key = ref new String(graphVar->GetVariableName().data());
                     double value = 1.0;
 
+                    Variable ^ variable;
+
                     if (Variables->HasKey(key))
                     {
-                        value = Variables->Lookup(key);
+                        variable = Variables->Lookup(key);
                     }
 
-                    updatedVariables->Insert(key, value);
+                    if (variable == nullptr)
+                    {
+                        variable = ref new Variable(1.0);
+                    }
+
+                    updatedVariables->Insert(key, variable);
                 }
             }
         }
@@ -504,17 +511,11 @@ namespace GraphControl
 
     void Grapher::SetVariable(Platform::String ^ variableName, double newValue)
     {
-        if (Variables->HasKey(variableName))
+        if (!Variables->HasKey(variableName))
         {
-            if (Variables->Lookup(variableName) == newValue)
+            Variables->Insert(variableName, ref new Variable(newValue));
-            {
-                return;
         }
 
-            Variables->Remove(variableName);
-        }
-
-        Variables->Insert(variableName, newValue);
 
         if (m_graph != nullptr && m_renderMain != nullptr)
         {

src/GraphControl/Control/Grapher.h

@@ -4,9 +4,10 @@
 #pragma once
 
 #include "DirectX/RenderMain.h"
-#include "../Models/Equation.h"
+#include "Models/Equation.h"
-#include "../Models/EquationCollection.h"
+#include "Models/EquationCollection.h"
-#include "../Utils.h"
+#include "Models/Variable.h"
+#include "Utils.h"
 #include "IGraphAnalyzer.h"
 #include "IMathSolver.h"
 #include "Common.h"
@@ -43,9 +44,9 @@ public
         DEPENDENCY_PROPERTY_WITH_DEFAULT_AND_CALLBACK(bool, ForceProportionalAxes, true);
         DEPENDENCY_PROPERTY_WITH_DEFAULT_AND_CALLBACK(bool, UseCommaDecimalSeperator, false);
         DEPENDENCY_PROPERTY_WITH_DEFAULT(
-            SINGLE_ARG(Windows::Foundation::Collections::IObservableMap<Platform::String ^, double> ^),
+            SINGLE_ARG(Windows::Foundation::Collections::IObservableMap<Platform::String ^, GraphControl::Variable ^> ^),
             Variables,
-            SINGLE_ARG(ref new Platform::Collections::Map<Platform::String ^, double>()));
+            SINGLE_ARG(ref new Platform::Collections::Map<Platform::String ^, GraphControl::Variable ^>()));
         DEPENDENCY_PROPERTY_R_WITH_DEFAULT_AND_CALLBACK(GraphControl::EquationCollection ^, Equations, nullptr);
         DEPENDENCY_PROPERTY_WITH_DEFAULT_AND_CALLBACK(Windows::UI::Color, AxesColor, Windows::UI::Colors::Transparent);
         DEPENDENCY_PROPERTY_WITH_DEFAULT_AND_CALLBACK(Windows::UI::Color, GraphBackground, Windows::UI::Colors::Transparent);
@@ -105,7 +106,7 @@ public
             }
         }
 
-        event Windows::Foundation::EventHandler<Windows::Foundation::Collections::IMap<Platform::String ^, double> ^> ^ VariablesUpdated;
+        event Windows::Foundation::EventHandler<Windows::Foundation::Collections::IMap<Platform::String ^, Variable ^> ^> ^ VariablesUpdated;
         void SetVariable(Platform::String ^ variableName, double newValue);
         Platform::String ^ ConvertToLinear(Platform::String ^ mmlString);
         Platform::String ^ FormatMathML(Platform::String ^ mmlString);

src/GraphControl/GraphControl.vcxproj

@@ -300,6 +300,7 @@
     <ClInclude Include="Models\KeyGraphFeaturesInfo.h" />
     <ClInclude Include="pch.h" />
     <ClInclude Include="Utils.h" />
+    <ClInclude Include="Models\Variable.h" />
     <ClInclude Include="winrtHeaders.h" />
   </ItemGroup>
   <ItemGroup>

src/GraphControl/GraphControl.vcxproj.filters

@@ -60,6 +60,9 @@
     <ClInclude Include="Models\EquationCollection.h">
       <Filter>Models</Filter>
     </ClInclude>
+    <ClInclude Include="Models\Variable.h">
+      <Filter>Models</Filter>
+    </ClInclude>
     <ClInclude Include="Logger\TraceLogger.h" />
   </ItemGroup>
   <ItemGroup>
@@ -70,7 +73,5 @@
   <ItemGroup>
     <CopyFileToFolders Include="$(GraphingImplDll)" />
     <CopyFileToFolders Include="$(GraphingEngineDll)" />
-    <CopyFileToFolders Include="$(GraphingImplDll)" />
-    <CopyFileToFolders Include="$(GraphingEngineDll)" />
   </ItemGroup>
 </Project>

src/GraphControl/Models/Variable.h

@@ -0,0 +1,26 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#pragma once
+#include "Utils.h"
+
+namespace GraphControl
+{
+public
+    ref class Variable sealed
+    {
+    public:
+        PROPERTY_RW(double, Value);
+        PROPERTY_RW(double, Step);
+        PROPERTY_RW(double, Min);
+        PROPERTY_RW(double, Max);
+
+        Variable(double value)
+            : m_Value{ value }
+            , m_Step{ 0.1 }
+            , m_Min{ 0.0 }
+            , m_Max{ 2.0 }
+        {
+        }
+    };
+}

src/Settings.XamlStyler

@@ -19,7 +19,8 @@
         "*:*, *",
         "PageSource, PageIndex, Offset, Color, TargetName, Property, Value, StartPoint, EndPoint",
         "mc:Ignorable, d:IsDataSource, d:LayoutOverrides, d:IsStaticText",
-		"IsEnabled, x:Load, Load"
+		"IsEnabled, x:Load, Load",
+        "Value, Maximum, Minimum"
     ],
     "OrderAttributesByName": true,
     "PutEndingBracketOnNewLine": false,