private Page CreatePage(NavPageType pageType, Subject subject = null)
{
Page page;
Type type;
switch (pageType)
{
case NavPageType.MainPage:
type = typeof(MainPage);
break;
case NavPageType.AboutPage:
type = typeof(AboutPage);
break;
case NavPageType.SubjectsPage:
type = typeof(SubjectsPage);
break;
case NavPageType.SubjectPage:
type = typeof(SubjectPage);
break;
case NavPageType.DefinitionsPage:
type = typeof(DefinitionsPage);
break;
case NavPageType.FormulasPage:
type = typeof(FormulasPage);
break;
case NavPageType.SolverPage:
type = typeof(SolverPage);
break;
case NavPageType.SearchPage:
type = typeof(SearchPage);
break;
default:
throw new ArgumentOutOfRangeException(nameof(pageType), pageType, null);
}
if (subject == null)
{
page = Activator.CreateInstance(type) as Page;
MainPages.Add(pageType, page);
}
else
{
page = Activator.CreateInstance(type, subject) as Page;
var subjectType = subject.Base.SubjectType;
SubjectPages[subjectType].Add(pageType, page);
}
return(page);
}
public void NavigateToMainPage(MainPages page)
{
switch (page)
{
case MainPages.AppShell:
Application.Current.MainPage = new AppShell();
break;
case MainPages.AuthenticationPage:
Application.Current.MainPage = new AuthenticationPage();
break;
}
}
public async Task SwitchPage(MainPages page, bool animate = true)
{
var target = pages[page];
var ipage = (IMainPage)target;
if (ipage != null)
{
lbMainPageTitle.Text = ipage.Title;
if (page == MainPages.Home) btnBack.Visible = false;
else btnBack.Visible = true;
}
else
{
btnBack.Visible = false;
lbMainPageTitle.Text = "";
}
await switchPanel1.SwitchContent(target, animate ? SwitchPanel.AnimType.SlideLeft : (SwitchPanel.AnimType?)null);
if (ipage != null && lastBgImage != ipage.MainWindowBgImage)
{
lastBgImage = ipage.MainWindowBgImage;
BackgroundImage = null;
panelRight.BackgroundImage = null;
}
}
private Page GetMainPage(NavPageType pageType)
{
return(!MainPages.ContainsKey(pageType) ? CreatePage(pageType) : MainPages[pageType]);
}