public LandingPage()
{
var viewModel = new TimerViewModel();
BindingContext = viewModel;
Entry numberOfQuestions = new Entry {
Placeholder = "Enter number of questions"
};
Entry timeForTest = new Entry {
Placeholder = "Enter the total time of the test (minutes)"
};
Label timer = new Label {
Text = "Total Time: "
};
Label questionCount = new Label {
Text = "Current Question: "
};
Button start = new Button {
Text = "Start Test"
};
numberOfQuestions.SetBinding(Entry.TextProperty, "NumberOfQuestions");
timeForTest.SetBinding(Entry.TextProperty, "Time");
timer.SetBinding(Label.TextProperty, "Timer");
questionCount.SetBinding(Label.TextProperty, "QuestionCount");
start.Clicked += (object sender, EventArgs e) => {
if (numberOfQuestions.Text == null || timeForTest == null)
{
DisplayAlert("Error", "You must enter the number of questions and total time of test.", "OK");
return;
}
start.IsEnabled = false;
numberOfQuestions.IsEnabled = false;
timeForTest.IsEnabled = false;
viewModel.StartTimer();
};
Content = new StackLayout {
HorizontalOptions = LayoutOptions.CenterAndExpand,
VerticalOptions = LayoutOptions.CenterAndExpand,
Children =
{
numberOfQuestions,
timeForTest,
timer,
questionCount,
start
}
};
}
public LandingPage ()
{
var viewModel = new TimerViewModel ();
BindingContext = viewModel;
Entry numberOfQuestions = new Entry { Placeholder = "Enter number of questions" };
Entry timeForTest = new Entry { Placeholder = "Enter the total time of the test (minutes)" };
Label timer = new Label { Text = "Total Time: " };
Label questionCount = new Label { Text = "Current Question: " };
Button start = new Button { Text = "Start Test" };
numberOfQuestions.SetBinding (Entry.TextProperty, "NumberOfQuestions");
timeForTest.SetBinding (Entry.TextProperty, "Time");
timer.SetBinding (Label.TextProperty, "Timer");
questionCount.SetBinding (Label.TextProperty, "QuestionCount");
start.Clicked += (object sender, EventArgs e) => {
if(numberOfQuestions.Text == null || timeForTest == null){
DisplayAlert("Error","You must enter the number of questions and total time of test.","OK");
return;
}
start.IsEnabled = false;
numberOfQuestions.IsEnabled = false;
timeForTest.IsEnabled = false;
viewModel.StartTimer();
};
Content = new StackLayout {
HorizontalOptions = LayoutOptions.CenterAndExpand,
VerticalOptions = LayoutOptions.CenterAndExpand,
Children = {
numberOfQuestions,
timeForTest,
timer,
questionCount,
start
}
};
}
