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This commit is contained in:
Howard Wolosky
parent
456fe5e355
commit
c13b8a099e
822 changed files with 276650 additions and 75 deletions
287
src/CalcViewModel/Common/AlwaysSelectedCollectionView.h
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287
src/CalcViewModel/Common/AlwaysSelectedCollectionView.h
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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#pragma once
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namespace CalculatorApp { namespace Common
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{
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ref class AlwaysSelectedCollectionView sealed:
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public Windows::UI::Xaml::DependencyObject,
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public Windows::UI::Xaml::Data::ICollectionView
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{
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internal:
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AlwaysSelectedCollectionView(Windows::UI::Xaml::Interop::IBindableVector^ source):
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m_currentPosition(-1)
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{
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m_source = source;
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Windows::UI::Xaml::Interop::IBindableObservableVector^ observable = dynamic_cast<Windows::UI::Xaml::Interop::IBindableObservableVector^>(source);
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if (observable)
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{
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observable->VectorChanged +=
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ref new Windows::UI::Xaml::Interop::BindableVectorChangedEventHandler(this, &AlwaysSelectedCollectionView::OnSourceBindableVectorChanged);
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}
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}
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private:
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// ICollectionView
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// Not implemented methods
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virtual WF::IAsyncOperation<Windows::UI::Xaml::Data::LoadMoreItemsResult>^ LoadMoreItemsAsync(unsigned int) = Windows::UI::Xaml::Data::ICollectionView::LoadMoreItemsAsync
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual bool MoveCurrentToFirst() = Windows::UI::Xaml::Data::ICollectionView::MoveCurrentToFirst
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual bool MoveCurrentToLast() = Windows::UI::Xaml::Data::ICollectionView::MoveCurrentToLast
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual bool MoveCurrentToNext() = Windows::UI::Xaml::Data::ICollectionView::MoveCurrentToNext
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual bool MoveCurrentToPrevious() = Windows::UI::Xaml::Data::ICollectionView::MoveCurrentToPrevious
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{
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throw ref new Platform::NotImplementedException();
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}
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property Windows::Foundation::Collections::IObservableVector<Platform::Object^>^ CollectionGroups
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{
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virtual Windows::Foundation::Collections::IObservableVector<Platform::Object^>^ get() = Windows::UI::Xaml::Data::ICollectionView::CollectionGroups::get
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{
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return ref new Platform::Collections::Vector<Platform::Object^>();
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}
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}
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property bool HasMoreItems
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{
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virtual bool get() = Windows::UI::Xaml::Data::ICollectionView::HasMoreItems::get
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{
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return false;
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}
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}
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// Implementented methods
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virtual bool MoveCurrentTo(Platform::Object^ item) = Windows::UI::Xaml::Data::ICollectionView::MoveCurrentTo
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{
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if (item)
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{
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unsigned int newCurrentPosition = 0;
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bool result = m_source->IndexOf(item, &newCurrentPosition);
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if (result)
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{
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m_currentPosition = newCurrentPosition;
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m_currentChanged(this, nullptr);
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return true;
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}
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}
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// The item is not in the collection
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// We're going to schedule a call back later so we
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// restore the selection to the way we wanted it to begin with
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if (m_currentPosition >= 0 && m_currentPosition < static_cast<int>(m_source->Size))
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{
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this->Dispatcher->RunAsync(Windows::UI::Core::CoreDispatcherPriority::Normal,
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ref new Windows::UI::Core::DispatchedHandler(
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[this]()
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{
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m_currentChanged(this, nullptr);
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}));
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}
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return false;
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}
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virtual bool MoveCurrentToPosition(int index) = Windows::UI::Xaml::Data::ICollectionView::MoveCurrentToPosition
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{
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if (index < 0 || index >= static_cast<int>(m_source->Size))
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{
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return false;
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}
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m_currentPosition = index;
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m_currentChanged(this, nullptr);
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return true;
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}
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property Platform::Object^ CurrentItem
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{
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virtual Platform::Object^ get() = Windows::UI::Xaml::Data::ICollectionView::CurrentItem::get
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{
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if (m_currentPosition >= 0 && m_currentPosition < static_cast<int>(m_source->Size))
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{
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return m_source->GetAt(m_currentPosition);
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}
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return nullptr;
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}
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}
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property int CurrentPosition
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{
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virtual int get() = Windows::UI::Xaml::Data::ICollectionView::CurrentPosition::get
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{
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return m_currentPosition;
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}
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}
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property bool IsCurrentAfterLast
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{
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virtual bool get() = Windows::UI::Xaml::Data::ICollectionView::IsCurrentAfterLast::get
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{
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return m_currentPosition >= static_cast<int>(m_source->Size);
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}
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}
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property bool IsCurrentBeforeFirst
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{
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virtual bool get() = Windows::UI::Xaml::Data::ICollectionView::IsCurrentBeforeFirst::get
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{
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return m_currentPosition < 0;
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}
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}
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event WF::EventHandler<Platform::Object^>^ CurrentChanged
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{
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virtual WF::EventRegistrationToken add(WF::EventHandler<Platform::Object^>^ handler) = Windows::UI::Xaml::Data::ICollectionView::CurrentChanged::add
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{
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return m_currentChanged += handler;
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}
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virtual void remove(WF::EventRegistrationToken token) = Windows::UI::Xaml::Data::ICollectionView::CurrentChanged::remove
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{
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m_currentChanged -= token;
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}
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}
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event Windows::UI::Xaml::Data::CurrentChangingEventHandler^ CurrentChanging
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{
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virtual WF::EventRegistrationToken add(Windows::UI::Xaml::Data::CurrentChangingEventHandler^ handler) = Windows::UI::Xaml::Data::ICollectionView::CurrentChanging::add
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{
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return m_currentChanging += handler;
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}
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virtual void remove(WF::EventRegistrationToken token) = Windows::UI::Xaml::Data::ICollectionView::CurrentChanging::remove
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{
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m_currentChanging -= token;
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}
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}
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// IVector<Object^>
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// Not implemented methods
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virtual void Append(Platform::Object^ /*item*/) = Windows::Foundation::Collections::IVector<Platform::Object^>::Append
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual void Clear() = Windows::Foundation::Collections::IVector<Platform::Object^>::Clear
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual unsigned int GetMany(unsigned int /*startIndex*/, Platform::WriteOnlyArray<Platform::Object^>^ /*items*/) = Windows::Foundation::Collections::IVector<Platform::Object^>::GetMany
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual Windows::Foundation::Collections::IVectorView<Platform::Object^>^ GetView() = Windows::Foundation::Collections::IVector<Platform::Object^>::GetView
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual void InsertAt(unsigned int /*index*/, Platform::Object^ /*item*/) = Windows::Foundation::Collections::IVector<Platform::Object^>::InsertAt
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual void RemoveAt(unsigned int /*index*/) = Windows::Foundation::Collections::IVector<Platform::Object^>::RemoveAt
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual void RemoveAtEnd() = Windows::Foundation::Collections::IVector<Platform::Object^>::RemoveAtEnd
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual void ReplaceAll(const Platform::Array<Platform::Object^>^ /*items*/) = Windows::Foundation::Collections::IVector<Platform::Object^>::ReplaceAll
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{
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throw ref new Platform::NotImplementedException();
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}
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virtual void SetAt(unsigned int /*index*/, Platform::Object^ /*item*/) = Windows::Foundation::Collections::IVector<Platform::Object^>::SetAt
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{
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throw ref new Platform::NotImplementedException();
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}
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// Implemented methods
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virtual Platform::Object^ GetAt(unsigned int index) = Windows::Foundation::Collections::IVector<Platform::Object^>::GetAt
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{
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return m_source->GetAt(index);
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}
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virtual bool IndexOf(Platform::Object^ item, unsigned int* index) = Windows::Foundation::Collections::IVector<Platform::Object^>::IndexOf
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{
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return m_source->IndexOf(item, index);
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}
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property unsigned int Size
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{
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virtual unsigned int get() = Windows::Foundation::Collections::IVector<Platform::Object^>::Size::get
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{
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return m_source->Size;
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}
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}
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// IObservableVector<Object^>
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event Windows::Foundation::Collections::VectorChangedEventHandler<Platform::Object^>^ VectorChanged
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{
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virtual WF::EventRegistrationToken add(Windows::Foundation::Collections::VectorChangedEventHandler<Platform::Object^>^ handler) = Windows::Foundation::Collections::IObservableVector<Platform::Object^>::VectorChanged::add
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{
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return m_vectorChanged += handler;
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}
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virtual void remove(WF::EventRegistrationToken token) = Windows::Foundation::Collections::IObservableVector<Platform::Object^>::VectorChanged::remove
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{
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m_vectorChanged -= token;
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}
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}
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// IIterable<Object^>
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// Not implemented
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virtual Windows::Foundation::Collections::IIterator<Platform::Object^>^ First() = Windows::Foundation::Collections::IIterable<Platform::Object^>::First
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{
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throw ref new Platform::NotImplementedException();
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}
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// Event handlers
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void OnSourceBindableVectorChanged(Windows::UI::Xaml::Interop::IBindableObservableVector^ source, Platform::Object^ e)
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{
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Windows::Foundation::Collections::IVectorChangedEventArgs^ args = safe_cast<Windows::Foundation::Collections::IVectorChangedEventArgs^>(e);
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m_vectorChanged(this, args);
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}
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Windows::UI::Xaml::Interop::IBindableVector^ m_source;
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int m_currentPosition;
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event WF::EventHandler<Platform::Object^>^ m_currentChanged;
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event Windows::UI::Xaml::Data::CurrentChangingEventHandler^ m_currentChanging;
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event Windows::Foundation::Collections::VectorChangedEventHandler<Platform::Object^>^ m_vectorChanged;
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};
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public ref class AlwaysSelectedCollectionViewConverter sealed: public Windows::UI::Xaml::Data::IValueConverter
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{
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public:
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AlwaysSelectedCollectionViewConverter()
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{ }
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private:
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virtual Platform::Object^ Convert(
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Platform::Object^ value,
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Windows::UI::Xaml::Interop::TypeName /*targetType*/,
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Platform::Object^ /*parameter*/,
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Platform::String^ /*language*/) = Windows::UI::Xaml::Data::IValueConverter::Convert
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{
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auto result = dynamic_cast<Windows::UI::Xaml::Interop::IBindableVector^>(value);
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if (result)
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{
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return ref new AlwaysSelectedCollectionView(result);
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}
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return Windows::UI::Xaml::DependencyProperty::UnsetValue; // Can't convert
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}
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virtual Platform::Object^ ConverBack(
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Platform::Object^ /*value*/,
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Windows::UI::Xaml::Interop::TypeName /*targetType*/,
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Platform::Object^ /*parameter*/,
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Platform::String^ /*language*/) = Windows::UI::Xaml::Data::IValueConverter::ConvertBack
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{
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return Windows::UI::Xaml::DependencyProperty::UnsetValue;
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}
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};
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}}
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