66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#include "pch.h"
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#include "ScreenStack.h"
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#include "JSValueXaml.h"
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#include "NativeModules.h"
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namespace winrt {
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using namespace Microsoft::ReactNative;
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using namespace Windows::Foundation;
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using namespace Windows::Foundation::Collections;
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using namespace Windows::UI;
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using namespace Windows::UI::Xaml;
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using namespace Windows::UI::Xaml::Controls;
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} // namespace winrt
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namespace winrt::RNScreens::implementation {
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ScreenStack::ScreenStack(
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winrt::Microsoft::ReactNative::IReactContext reactContext)
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: m_reactContext(reactContext),
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m_children(
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{winrt::single_threaded_vector<Windows::UI::Xaml::UIElement>()}) {}
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void ScreenStack::addScreen(Screen &screen, int64_t) {
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auto uiElement = screen.try_as<UIElement>();
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if (!uiElement)
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return;
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m_children.Append(uiElement);
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Content(uiElement);
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}
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void ScreenStack::removeAllChildren() {
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Content(nullptr);
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m_children.Clear();
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}
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void ScreenStack::removeChildAt(int64_t index) {
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m_children.RemoveAt(static_cast<uint32_t>(index));
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onChildModified(index);
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}
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void ScreenStack::replaceChild(
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winrt::Windows::UI::Xaml::UIElement oldChild,
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winrt::Windows::UI::Xaml::UIElement newChild) {
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uint32_t index;
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if (!m_children.IndexOf(oldChild, index))
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return;
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m_children.SetAt(index, newChild);
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onChildModified(index);
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}
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void ScreenStack::onChildModified(int64_t index) {
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// Was it the topmost item in the stack?
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if (index >= m_children.Size() - 1) {
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if (m_children.Size() == 0) {
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// Nobody left
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Content(nullptr);
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} else {
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// Focus on the top item
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auto uiElement = m_children.GetAt(m_children.Size() - 1);
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Content(uiElement);
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}
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}
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}
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} // namespace winrt::RNScreens::implementation
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