Create EquationTextBox control (#547)

src/Calculator/Controls/EquationTextBox.cpp

@@ -0,0 +1,220 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#include "pch.h"
+#include "EquationTextBox.h"
+#include "CalcViewModel/GraphingCalculator/EquationViewModel.h"
+
+using namespace std;
+using namespace Platform;
+using namespace CalculatorApp;
+using namespace CalculatorApp::Common;
+using namespace CalculatorApp::Controls;
+using namespace CalculatorApp::ViewModel;
+using namespace Windows::Foundation;
+using namespace Windows::UI::Xaml;
+using namespace Windows::UI::Xaml::Controls;
+using namespace Windows::UI::Xaml::Input;
+using namespace Windows::UI::Xaml::Controls::Primitives;
+using namespace Windows::UI::Text;
+
+DEPENDENCY_PROPERTY_INITIALIZATION(EquationTextBox, EquationColor);
+DEPENDENCY_PROPERTY_INITIALIZATION(EquationTextBox, KeyGraphFeaturesContent);
+DEPENDENCY_PROPERTY_INITIALIZATION(EquationTextBox, ColorChooserFlyout);
+
+void EquationTextBox::OnApplyTemplate()
+{
+    m_equationButton = dynamic_cast<Button^>(GetTemplateChild("EquationButton"));
+    m_richEditBox = dynamic_cast<RichEditBox^>(GetTemplateChild("EquationTextBox"));
+    m_deleteButton = dynamic_cast<Button^>(GetTemplateChild("DeleteButton"));
+    m_removeButton = dynamic_cast<Button^>(GetTemplateChild("RemoveButton"));
+    m_functionButton = dynamic_cast<Button^>(GetTemplateChild("FunctionButton"));
+    m_colorChooserButton = dynamic_cast<ToggleButton^>(GetTemplateChild("ColorChooserButton"));
+
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->GotFocus += ref new RoutedEventHandler(this, &EquationTextBox::OnRichEditBoxGotFocus);
+        m_richEditBox->LostFocus += ref new RoutedEventHandler(this, &EquationTextBox::OnRichEditBoxLostFocus);
+        m_richEditBox->TextChanged += ref new RoutedEventHandler(this, &EquationTextBox::OnRichEditBoxTextChanged);
+    }
+
+    if (m_equationButton != nullptr)
+    {
+        m_equationButton->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnEquationButtonClicked);
+    }
+
+    if (m_deleteButton != nullptr)
+    {
+        m_deleteButton->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnDeleteButtonClicked);
+    }
+
+    if (m_removeButton != nullptr)
+    {
+        m_removeButton->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnRemoveButtonClicked);
+    }
+
+    if (m_colorChooserButton != nullptr)
+    {
+        m_colorChooserButton->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnColorChooserButtonClicked);
+    }
+
+    if (m_functionButton != nullptr)
+    {
+        m_functionButton->Click += ref new RoutedEventHandler(this, &EquationTextBox::OnFunctionButtonClicked);
+    }
+
+    if (ColorChooserFlyout != nullptr)
+    {
+        ColorChooserFlyout->Opened += ref new EventHandler<Object^>(this, &EquationTextBox::OnColorFlyoutOpened);
+        ColorChooserFlyout->Closed += ref new EventHandler<Object^>(this, &EquationTextBox::OnColorFlyoutClosed);
+    }
+}
+
+void EquationTextBox::OnPointerEntered(PointerRoutedEventArgs^ e)
+{
+    m_isPointerOver = true;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::OnPointerExited(PointerRoutedEventArgs^ e)
+{
+    m_isPointerOver = false;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::OnPointerCanceled(PointerRoutedEventArgs^ e)
+{
+    m_isPointerOver = false;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::OnPointerCaptureLost(PointerRoutedEventArgs^ e)
+{
+    m_isPointerOver = false;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::OnColorFlyoutOpened(Object^ sender, Object^ e)
+{
+    m_isColorChooserFlyoutOpen = true;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::OnColorFlyoutClosed(Object^ sender, Object^ e)
+{
+    m_colorChooserButton->IsChecked = false;
+    m_isColorChooserFlyoutOpen = false;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::OnRichEditBoxTextChanged(Object^ sender, RoutedEventArgs^ e)
+{
+    UpdateDeleteButtonVisualState();
+}
+
+void EquationTextBox::OnRichEditBoxGotFocus(Object^ sender, RoutedEventArgs^ e)
+{
+    m_isFocused = true;
+    UpdateCommonVisualState();
+    UpdateDeleteButtonVisualState();
+}
+
+void EquationTextBox::OnRichEditBoxLostFocus(Object^ sender, RoutedEventArgs^ e)
+{
+    m_isFocused = false;
+    UpdateCommonVisualState();
+    UpdateDeleteButtonVisualState();
+}
+
+void EquationTextBox::OnDeleteButtonClicked(Object^ sender, RoutedEventArgs^ e)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->SetText(::TextSetOptions::None, L"");
+    }
+}
+
+void EquationTextBox::OnEquationButtonClicked(Object^ sender, RoutedEventArgs^ e)
+{
+
+}
+
+void EquationTextBox::OnRemoveButtonClicked(Object^ sender, RoutedEventArgs^ e)
+{
+    RemoveButtonClicked(this, ref new RoutedEventArgs());
+}
+
+void EquationTextBox::OnColorChooserButtonClicked(Object^ sender, RoutedEventArgs^ e)
+{
+    if (ColorChooserFlyout != nullptr && m_richEditBox != nullptr)
+    {
+        ColorChooserFlyout->ShowAt(m_richEditBox);
+    }
+}
+
+void EquationTextBox::OnFunctionButtonClicked(Object^ sender, RoutedEventArgs^ e)
+{
+    auto equationViewModel = static_cast<EquationViewModel^>(DataContext);
+    equationViewModel->KeyGraphFeaturesVisibility = (equationViewModel->KeyGraphFeaturesVisibility == ::Visibility::Collapsed) ? ::Visibility::Visible : ::Visibility::Collapsed;
+    UpdateCommonVisualState();
+}
+
+void EquationTextBox::UpdateDeleteButtonVisualState()
+{
+    String^ state;
+
+    if (ShouldDeleteButtonBeVisible())
+    {
+        state = "ButtonVisible";
+    }
+    else
+    {
+        state = "ButtonCollapsed";
+    }
+
+    VisualStateManager::GoToState(this, state, true);
+}
+
+void EquationTextBox::UpdateCommonVisualState()
+{
+    String^ state = "Normal";
+
+    if (m_isFocused)
+    {
+        state = "Focused";
+    }
+    else if (m_isPointerOver || m_isColorChooserFlyoutOpen)
+    {
+        state = "PointerOver";
+    }
+
+    VisualStateManager::GoToState(this, state, true);
+}
+
+
+Platform::String^ EquationTextBox::GetEquationText()
+{
+    String^ text;
+
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->GetText(::TextGetOptions::NoHidden, &text);
+    }
+
+    return text;
+}
+
+void EquationTextBox::SetEquationText(Platform::String^ equationText)
+{
+    if (m_richEditBox != nullptr)
+    {
+        m_richEditBox->TextDocument->SetText(::TextSetOptions::None, equationText);
+    }
+}
+
+
+bool EquationTextBox::ShouldDeleteButtonBeVisible()
+{
+    return (!GetEquationText()->IsEmpty() && m_isFocused);
+
+}