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//*********************************************************
//
// Copyright (c) Microsoft. All rights reserved.
// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
//
//*********************************************************
//
// MainPage.xaml.cpp
// Implementation of the MainPage.xaml class.
//
#include "pch.h"
#include "MainPage.xaml.h"
#include "App.xaml.h"
#include <collection.h>
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Platform;
using namespace SDKSample;
using namespace Windows::UI::Xaml::Navigation;
using namespace Windows::UI::Xaml::Interop;
using namespace Windows::Graphics::Display;
using namespace Windows::UI::ViewManagement;
MainPage^ MainPage::Current = nullptr;
MainPage::MainPage()
{
InitializeComponent();
// This frame is hidden, meaning it is never shown. It is simply used to load
// each scenario page and then pluck out the input and output sections and
// place them into the UserControls on the main page.
HiddenFrame = ref new Windows::UI::Xaml::Controls::Frame();
HiddenFrame->Visibility = Windows::UI::Xaml::Visibility::Collapsed;
ContentRoot->Children->Append(HiddenFrame);
FeatureName->Text = FEATURE_NAME;
this->SizeChanged += ref new SizeChangedEventHandler(this, &MainPage::MainPage_SizeChanged);
Scenarios->SelectionChanged += ref new SelectionChangedEventHandler(this, &MainPage::Scenarios_SelectionChanged);
MainPage::Current = this;
autoSizeInputSectionWhenSnapped = true;
}
/// <summary>
/// We need to handle SizeChanged so that we can make the sample layout property
/// in the various layouts.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void MainPage::MainPage_SizeChanged(Object^ sender, SizeChangedEventArgs^ e)
{
InvalidateSize();
MainPageSizeChangedEventArgs^ args = ref new MainPageSizeChangedEventArgs();
args->ViewState = ApplicationView::Value;
MainPageResized(this, args);
}
void MainPage::InvalidateSize()
{
// Get the window width
double windowWidth = this->ActualWidth;
if (windowWidth != 0.0)
{
// Get the width of the ListBox.
double listBoxWidth = Scenarios->ActualWidth;
// Is the ListBox using any margins that we need to consider?
double listBoxMarginLeft = Scenarios->Margin.Left;
double listBoxMarginRight = Scenarios->Margin.Right;
// Figure out how much room is left after considering the list box width
double availableWidth = windowWidth - listBoxWidth;
// Is the top most child using margins?
double layoutRootMarginLeft = ContentRoot->Margin.Left;
double layoutRootMarginRight = ContentRoot->Margin.Right;
// We have different widths to use depending on the view state
if (ApplicationView::Value != ApplicationViewState::Snapped)
{
// Make us as big as the the left over space, factoring in the ListBox width, the ListBox margins.
// and the LayoutRoot's margins
InputSection->Width = ((availableWidth) -
(layoutRootMarginLeft + layoutRootMarginRight + listBoxMarginLeft + listBoxMarginRight));
}
else
{
// Make us as big as the left over space, factoring in just the LayoutRoot's margins.
if (autoSizeInputSectionWhenSnapped)
{
InputSection->Width = (windowWidth - (layoutRootMarginLeft + layoutRootMarginRight));
}
}
}
InvalidateViewState();
}
void MainPage::InvalidateViewState()
{
// Are we going to snapped mode?
if (ApplicationView::Value == ApplicationViewState::Snapped)
{
Grid::SetRow(DescriptionText, 3);
Grid::SetColumn(DescriptionText, 0);
Grid::SetRow(InputSection, 4);
Grid::SetColumn(InputSection, 0);
Grid::SetRow(FooterPanel, 2);
Grid::SetColumn(FooterPanel, 0);
}
else
{
Grid::SetRow(DescriptionText, 1);
Grid::SetColumn(DescriptionText, 1);
Grid::SetRow(InputSection, 2);
Grid::SetColumn(InputSection, 1);
Grid::SetRow(FooterPanel, 1);
Grid::SetColumn(FooterPanel, 1);
}
// Since we don't load the scenario page in the traditional manner (we just pluck out the
// input and output sections from the page) we need to ensure that any VSM code used
// by the scenario's input and output sections is fired.
VisualStateManager::GoToState(InputSection, "Input" + LayoutAwarePage::DetermineVisualState(ApplicationView::Value), false);
VisualStateManager::GoToState(OutputSection, "Output" + LayoutAwarePage::DetermineVisualState(ApplicationView::Value), false);
}
void MainPage::PopulateScenarios()
{
ScenarioList = ref new Platform::Collections::Vector<Object^>();
// Populate the ListBox with the list of scenarios as defined in Constants.cpp.
for (unsigned int i = 0; i < scenarios->Length; ++i)
{
Scenario s = scenarios[i];
ListBoxItem^ item = ref new ListBoxItem();
item->Name = s.ClassName;
item->Content = (i + 1).ToString() + ") " + s.Title;
ScenarioList->Append(item);
}
// Bind the ListBox to the scenario list.
Scenarios->ItemsSource = ScenarioList;
Scenarios->ScrollIntoView(Scenarios->SelectedItem);
}
/// <summary>
/// This method is responsible for loading the individual input and output sections for each scenario. This
/// is based on navigating a hidden Frame to the ScenarioX.xaml page and then extracting out the input
/// and output sections into the respective UserControl on the main page.
/// </summary>
/// <param name="scenarioName"></param>
void MainPage::LoadScenario(String^ scenarioName)
{
autoSizeInputSectionWhenSnapped = true;
// Load the ScenarioX.xaml file into the Frame.
TypeName scenarioType = {scenarioName, TypeKind::Custom};
HiddenFrame->Navigate(scenarioType, this);
// Get the top element, the Page, so we can look up the elements
// that represent the input and output sections of the ScenarioX file.
Page^ hiddenPage = safe_cast<Page^>(HiddenFrame->Content);
// Get each element.
UIElement^ input = safe_cast<UIElement^>(hiddenPage->FindName("Input"));
UIElement^ output = safe_cast<UIElement^>(hiddenPage->FindName("Output"));
if (input == nullptr)
{
// Malformed input section.
NotifyUser("Cannot load scenario input section for " + scenarioName +
" Make sure root of input section markup has x:Name of 'Input'", NotifyType::ErrorMessage);
return;
}
if (output == nullptr)
{
// Malformed output section.
NotifyUser("Cannot load scenario output section for " + scenarioName +
" Make sure root of output section markup has x:Name of 'Output'", NotifyType::ErrorMessage);
return;
}
// Find the LayoutRoot which parents the input and output sections in the main page.
Panel^ panel = safe_cast<Panel^>(hiddenPage->FindName("LayoutRoot"));
if (panel != nullptr)
{
unsigned int index = 0;
UIElementCollection^ collection = panel->Children;
// Get rid of the content that is currently in the intput and output sections.
collection->IndexOf(input, &index);
collection->RemoveAt(index);
collection->IndexOf(output, &index);
collection->RemoveAt(index);
// Populate the input and output sections with the newly loaded content.
InputSection->Content = input;
OutputSection->Content = output;
ScenarioLoaded(this, nullptr);
}
else
{
// Malformed Scenario file.
NotifyUser("Cannot load scenario: " + scenarioName + ". Make sure root tag in the '" +
scenarioName + "' file has an x:Name of 'LayoutRoot'", NotifyType::ErrorMessage);
}
}
void MainPage::Scenarios_SelectionChanged(Object^ sender, SelectionChangedEventArgs^ e)
{
if (Scenarios->SelectedItem != nullptr)
{
NotifyUser("", NotifyType::StatusMessage);
LoadScenario((safe_cast<ListBoxItem^>(Scenarios->SelectedItem))->Name);
InvalidateSize();
}
}
void MainPage::NotifyUser(String^ strMessage, NotifyType type)
{
switch (type)
{
case NotifyType::StatusMessage:
// Use the status message style.
StatusBlock->Style = safe_cast<Windows::UI::Xaml::Style^>(this->Resources->Lookup("StatusStyle"));
break;
case NotifyType::ErrorMessage:
// Use the error message style.
StatusBlock->Style = safe_cast<Windows::UI::Xaml::Style^>(this->Resources->Lookup("ErrorStyle"));
break;
default:
break;
}
StatusBlock->Text = strMessage;
// Collapsed the StatusBlock if it has no text to conserve real estate.
if (StatusBlock->Text != "")
{
StatusBlock->Visibility = Windows::UI::Xaml::Visibility::Visible;
}
else
{
StatusBlock->Visibility = Windows::UI::Xaml::Visibility::Collapsed;
}
}
void MainPage::Footer_Click(Object^ sender, RoutedEventArgs^ e)
{
auto uri = ref new Uri((String^)((HyperlinkButton^)sender)->Tag);
Windows::System::Launcher::LaunchUriAsync(uri);
}
/// <summary>
/// Populates the page with content passed during navigation. Any saved state is also
/// provided when recreating a page from a prior session.
/// </summary>
/// <param name="navigationParameter">The parameter value passed to
/// <see cref="Frame::Navigate(Type, Object)"/> when this page was initially requested.
/// </param>
/// <param name="pageState">A map of state preserved by this page during an earlier
/// session. This will be null the first time a page is visited.</param>
void MainPage::LoadState(Object^ navigationParameter, IMap<String^, Object^>^ pageState)
{
(void) navigationParameter; // Unused parameter
PopulateScenarios();
// Starting scenario is the first or based upon a previous state.
ListBoxItem^ startingScenario = nullptr;
int startingScenarioIndex = -1;
if (pageState != nullptr && pageState->HasKey("SelectedScenarioIndex"))
{
startingScenarioIndex = safe_cast<int>(pageState->Lookup("SelectedScenarioIndex"));
}
Scenarios->SelectedIndex = startingScenarioIndex != -1 ? startingScenarioIndex : 0;
InvalidateViewState();
}
/// <summary>
/// Preserves state associated with this page in case the application is suspended or the
/// page is discarded from the navigation cache. Values must conform to the serialization
/// requirements of <see cref="SuspensionManager::SessionState"/>.
/// </summary>
/// <param name="pageState">An empty map to be populated with serializable state.</param>
void MainPage::SaveState(IMap<String^, Object^>^ pageState)
{
int selectedListBoxItemIndex = Scenarios->SelectedIndex;
pageState->Insert("SelectedScenarioIndex", selectedListBoxItemIndex);
}