public HomePage()
{
this.InitializeComponent();
this.navigationHelper = new NavigationHelper(this);
this.navigationHelper.LoadState += navigationHelper_LoadState;
this.navigationHelper.SaveState += navigationHelper_SaveState;
// MVVM is not used in this example. We're porting an existing sample from Silverlight MVC
// we will make use of the existing pattern to achieve the results
model = new DietCalculatorModel();
controller = new DietCalculatorController(model);
// bydefault Male is Selected, hence collapse hips
txtHips.Visibility = tblHips.Visibility = Visibility.Collapsed;
cmbGender.SelectionChanged += (sender, args) =>
{
var isSelectedItemMale = ((string)cmbGender.SelectedItem == "Male");
txtHips.Visibility = tblHips.Visibility = isSelectedItemMale ? Visibility.Collapsed : Visibility.Visible;
// corner case: reset hipsText to empty if the user had typed in hips and later changed the gender
if (isSelectedItemMale)
{
txtHips.Text = string.Empty;
}
};
// subscribe to IdealBMI and IdealWeight changed events on the model to update the UI
// as per the implementation in the core project,
// any change in IdealBMI or IdealWeight are notified using appropriate event handlers
model.IdealBMIChanged += (sender, e) =>
{
txtIdealBMI.Text = e.IdealBMI.ToString();
};
model.IdealWeightChanged += (sender, e) =>
{
txtIdealWeight.Text = e.IdealWeight.ToString();
};
txtIdealWeight.TextChanged += (sender, e) =>
{
controller.SetWeight(StringToNumberUtility.GetDouble(txtWeight.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(txtHeight.Text, 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(txtIdealWeight.Text, 0.00));
};
txtIdealBMI.TextChanged += (sender, e) =>
{
controller.SetWeight(StringToNumberUtility.GetDouble(txtWeight.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(txtHeight.Text, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(txtIdealBMI.Text, 0.00));
};
}
private void btnCalculate_Click(object sender, RoutedEventArgs e)
{
controller.SetAge(StringToNumberUtility.GetInt32(txtAge.Text, 0));
controller.SetGender((listGender.SelectedIndex == 0) ? true : false);
controller.SetWeight(StringToNumberUtility.GetDouble(txtWeight.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(txtHeight.Text, 0.00));
controller.SetWaist(StringToNumberUtility.GetDouble(txtWaist.Text, 0.00));
controller.SetHips(StringToNumberUtility.GetDouble((!string.IsNullOrEmpty(txtHips.Text) ? txtHips.Text : null), 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(txtIdealWeight.Text, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(txtIdealBMI.Text, 0.00));
controller.SetCholesterol(StringToNumberUtility.GetDouble(txtCholestrol.Text, 0.00));
controller.SetHDL(StringToNumberUtility.GetDouble(txtHDL.Text, 0.00));
controller.SetNeck(StringToNumberUtility.GetDouble(txtNeck.Text, 0.00));
var selectedActivity = (string)listActivity.SelectedItem;
controller.SetActivity((LevelOfActivity)Enum.Parse(typeof(LevelOfActivity), selectedActivity));
// set the model to a public static property. This will be accessed from ResultsPage
CalculatedModel = model;
Frame.Navigate(typeof(ResultsPage));
}
private void CaclculateGridViewItem_Tapped(object sender, TappedRoutedEventArgs e)
{
controller.SetAge(StringToNumberUtility.GetInt32(txtAge.Text, 0));
controller.SetGender((cmbGender.SelectedIndex == 0) ? true : false);
controller.SetWeight(StringToNumberUtility.GetDouble(txtWeight.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(txtHeight.Text, 0.00));
controller.SetWaist(StringToNumberUtility.GetDouble(txtWaist.Text, 0.00));
controller.SetHips(StringToNumberUtility.GetDouble((!string.IsNullOrEmpty(txtHips.Text) ? txtHips.Text : null), 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(txtIdealWeight.Text, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(txtIdealBMI.Text, 0.00));
controller.SetCholesterol(StringToNumberUtility.GetDouble(txtCholestrol.Text, 0.00));
controller.SetHDL(StringToNumberUtility.GetDouble(txtHDL.Text, 0.00));
controller.SetNeck(StringToNumberUtility.GetDouble(txtNeck.Text, 0.00));
var selectedActivity = (string)cmbLevelOfActivity.SelectedItem;
controller.SetActivity((LevelOfActivity)Enum.Parse(typeof(LevelOfActivity), selectedActivity));
// HACK: force refresh UI
resultsControl.DataContext = null;
resultsControl.DataContext = model;
resultsControl.Visibility = Visibility.Visible;
MainContent.Width = 3000;
MainScroll.ChangeView(1400, null, null);
}
/// <summary>
/// OnCreate
/// </summary>
/// <param name="bundle"></param>
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
model = new DietCalculatorModel();
controller = new DietCalculatorController(model);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
// retrieve the widgets in UI using FindByViewId to interact programmatically
var ageText = FindViewById <EditText>(Resource.Id.ageText);
var genderSpinner = FindViewById <Spinner>(Resource.Id.genderSpinner);
var levelOfActivitySpinner = FindViewById <Spinner>(Resource.Id.levelOfActivitySpinner);
var calculateButton = FindViewById <Button>(Resource.Id.calculateButton);
var weightText = FindViewById <EditText>(Resource.Id.weightText);
var heightText = FindViewById <EditText>(Resource.Id.heightText);
var waistText = FindViewById <EditText>(Resource.Id.waistText);
var hipsLayout = FindViewById <LinearLayout>(Resource.Id.hipsLayout);
var hipstText = FindViewById <EditText>(Resource.Id.hipsText);
var idealWeightText = FindViewById <EditText>(Resource.Id.idealWeightText);
var idealBMIText = FindViewById <EditText>(Resource.Id.idealBMIText);
var cholestrolText = FindViewById <EditText>(Resource.Id.cholestrolText);
var hdlText = FindViewById <EditText>(Resource.Id.hdlText);
var neckText = FindViewById <EditText>(Resource.Id.neckText);
// Assign "Male", "Female" values to spinner using ArrayAdapter. Refer Resources/Values/String.xml
ArrayAdapter genderAdapter = ArrayAdapter.CreateFromResource(this, Resource.Array.gender_array,
Resource.Layout.diet_spinner_item);
genderAdapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
genderSpinner.Adapter = genderAdapter;
// Hips should be visible only if "Female" is selected
genderSpinner.ItemSelected += (sender, args) =>
{
var isSelectedItemMale = ((string)genderSpinner.SelectedItem == "Male");
hipsLayout.Visibility = isSelectedItemMale ? ViewStates.Gone : ViewStates.Visible;
// corner case: reset hipsText to empty if the user had typed in hips and later changed the gender
if (isSelectedItemMale)
{
hipstText.Text = string.Empty;
}
};
// Assign "Active", "Moderate", "Sedentary" values to spinner using ArrayAdapter. Refer Resources/Values/String.xml
ArrayAdapter levelOfActivityAdapter = ArrayAdapter.CreateFromResource(this, Resource.Array.levelOfActivity_array,
Resource.Layout.diet_spinner_item);
levelOfActivityAdapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem);
levelOfActivitySpinner.Adapter = levelOfActivityAdapter;
// On Button Click, set appropriate values in the Controller Class
calculateButton.Click += (sender, args) =>
{
controller.SetAge(StringToNumberUtility.GetInt32(ageText.Text, 0));
controller.SetGender((genderSpinner.SelectedItemId == 0) ? true : false);
controller.SetWeight(StringToNumberUtility.GetDouble(weightText.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(heightText.Text, 0.00));
controller.SetWaist(StringToNumberUtility.GetDouble(waistText.Text, 0.00));
controller.SetHips(StringToNumberUtility.GetDouble((!string.IsNullOrEmpty(hipstText.Text) ? hipstText.Text : null), 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(idealWeightText.Text, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(idealBMIText.Text, 0.00));
controller.SetCholesterol(StringToNumberUtility.GetDouble(cholestrolText.Text, 0.00));
controller.SetHDL(StringToNumberUtility.GetDouble(hdlText.Text, 0.00));
controller.SetNeck(StringToNumberUtility.GetDouble(neckText.Text, 0.00));
var selectedActivity = (string)levelOfActivitySpinner.SelectedItem;
controller.SetActivity((LevelOfActivity)Enum.Parse(typeof(LevelOfActivity), selectedActivity));
// Since Model classes are already populated with the results, pass them to Result Activity
// using PutExtra method
var resultIntent = new Intent(this, typeof(ResultsActivity));
resultIntent.PutExtra("CaloriesPerDay", model.CaloriesPerDay.ToString());
resultIntent.PutExtra("LeanBodyMass", model.LeanBodyMass.ToString());
resultIntent.PutExtra("PercentBodyFat", model.PercentBodyFat.ToString() + " %");
resultIntent.PutExtra("WaistHipsRatio", model.WaistHipsRatio.ToString() + " cm");
resultIntent.PutExtra("BMI", model.BMI.ToString());
resultIntent.PutExtra("CholesterolRatio", model.CholesterolRatio.ToString() + " mmol/L");
resultIntent.PutExtra("WaistHeightRatio", model.WaistHeightRatio.ToString() + " cm");
resultIntent.PutExtra("IdealWeight", model.IdealWeight.ToString() + " kg");
StartActivity(resultIntent);
};
// subscribe to IdealBMI and IdealWeight changed events on the model to update the UI
// as per the implementation in the core project,
// any change in IdealBMI or IdealWeight are notified using appropriate event handlers
model.IdealBMIChanged += (sender, e) =>
{
idealBMIText.Text = e.IdealBMI.ToString();
};
model.IdealWeightChanged += (sender, e) =>
{
idealWeightText.Text = e.IdealWeight.ToString();
};
// Ideal BMI has to be calculated if user changes the IdealWeight.
// Set all the fields in the controller that are used for calcaulation
idealWeightText.TextChanged += (sender, e) =>
{
controller.SetWeight(StringToNumberUtility.GetDouble(weightText.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(heightText.Text, 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(idealWeightText.Text, 0.00));
};
idealBMIText.TextChanged += (sender, e) =>
{
controller.SetWeight(StringToNumberUtility.GetDouble(weightText.Text, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(heightText.Text, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(idealBMIText.Text, 0.00));
};
}
/// <summary>
/// Creates the UI for DialogViewController using Element API
/// </summary>
private void CreateUI()
{
EntryElement ageElement, weightElement, heightElement, waistElement, hipsElement = null,
idealWeightElement, idealBMIElement, cholestrolElement, hdlElement, neckElement;
StringElement calculateButtonElement;
Section waistHipsSection = null;
// Gender Group and Section
var genderRadioGroup = new RadioGroup("gender", 0);
var femaleRadioElement = new DietRadioElement("Female", "gender");
var maleRadioElement = new DietRadioElement("Male", "gender");
var radioElementSection = new Section()
{
maleRadioElement,
femaleRadioElement
};
// add hips element to wasit & hips section if female is selected
femaleRadioElement.Tapped += delegate {
if (!waistHipsSection.Elements.Contains(hipsElement = new NumericEntryElement("Hips (in cm)", "ex. 88")))
{
waistHipsSection.Add(hipsElement);
}
};
// remove hips element if male is selected.
maleRadioElement.Tapped += delegate {
if (waistHipsSection.Elements.Contains(hipsElement))
{
waistHipsSection.Remove(hipsElement);
}
};
// Level of ActivityGroup & Section
var levelOfActivityRadioGroup = new RadioGroup("levelOfActivity", 2);
var levelOfActivitySection = new Section()
{
new DietRadioElement(LevelOfActivity.Active.ToString(), "levelOfActivity"),
new DietRadioElement(LevelOfActivity.Moderate.ToString(), "levelOfActivity"),
new DietRadioElement(LevelOfActivity.Sedentary.ToString(), "levelOfActivity")
};
// Create Elements on the rootElement. This will be added to the DialogViewController's root.
rootElement = new RootElement("Diet Calculator")
{
new Section()
{
(ageElement = new NumericEntryElement("Age", "ex. 25")
{
KeyboardType = UIKeyboardType.NumberPad
}),
(new DietRootElement("Gender", genderRadioGroup)
{
radioElementSection
})
},
new Section("Height & Weight")
{
(weightElement = new NumericEntryElement("Weight (in kg)", "ex. 65")),
(heightElement = new NumericEntryElement("Height (in cm)", "ex. 170"))
}, (waistHipsSection = new Section("Waist & Hips")
{
(waistElement = new NumericEntryElement("Waist (in cm)", "ex. 47"))
/* hips element will be added here if female is selected*/
}),
new Section("Ideal Weight & BMI")
{
(idealWeightElement = new NumericEntryElement("Ideal Weight (in kg)", "ex. 45")),
(idealBMIElement = new NumericEntryElement("Ideal BMI (in kg/m2)", "ex. 18"))
},
new Section("Cholestrol & HDL")
{
(cholestrolElement = new NumericEntryElement("Cholestrol (in mmol/L)", "ex. 5.17")),
(hdlElement = new NumericEntryElement("HDL (in mmol/L)", "ex. 1.56"))
},
new Section("Neck")
{
(neckElement = new NumericEntryElement("Neck (in cm)", "ex. 30")),
},
new Section()
{
new DietRootElement("Level Of Activity", levelOfActivityRadioGroup)
{
levelOfActivitySection
}
},
/* Calculate Button*/
new Section()
{
(calculateButtonElement = new DietStringElement("Calculate",
/* On Calculate Click create the resulting UI*/
delegate {
/* exising code from SL MVC project */
controller.SetAge(StringToNumberUtility.GetInt32(ageElement.Value, 0));
controller.SetGender(genderRadioGroup.Selected == 0 ? true : false);
controller.SetWeight(StringToNumberUtility.GetDouble(weightElement.Value, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(heightElement.Value, 0.00));
controller.SetWaist(StringToNumberUtility.GetDouble(waistElement.Value, 0.00));
controller.SetHips(StringToNumberUtility.GetDouble((hipsElement == null ? null : hipsElement.Value), 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(idealWeightElement.Value, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(idealBMIElement.Value, 0.00));
controller.SetCholesterol(StringToNumberUtility.GetDouble(cholestrolElement.Value, 0.00));
controller.SetHDL(StringToNumberUtility.GetDouble(hdlElement.Value, 0.00));
controller.SetNeck(StringToNumberUtility.GetDouble(neckElement.Value, 0.00));
var selectedActivity = levelOfActivitySection.Elements[levelOfActivityRadioGroup.Selected].Caption;
controller.SetActivity(( LevelOfActivity )Enum.Parse(typeof(LevelOfActivity), selectedActivity));
resultSection = new Section("Results")
{
new DietStringElement("Calories Per Day: ", model.CaloriesPerDay.ToString()),
new DietStringElement("Lean Body Mass: ", model.LeanBodyMass.ToString()),
new DietStringElement("Fat: ", model.PercentBodyFat.ToString() + " %"),
new DietStringElement("Waist Hips Label: ", model.WaistHipsRatio.ToString() + " cm"),
new DietStringElement("BMI Ratio: ", model.BMI.ToString()),
new DietStringElement("Cholestrol Ratio: ", model.CholesterolRatio.ToString() + " mmol/L"),
new DietStringElement("Waist Height Ratio: ", model.WaistHeightRatio.ToString() + " cm"),
new DietStringElement("Ideal Weight: ", model.IdealWeight.ToString() + " kg"),
};
resultDvc = new DietDialogViewController(new RootElement("Results")
{
resultSection
}, true);
nvc.PushViewController(resultDvc, true);
}))
}
};
// subscribe to IdealBMI and IdealWeight changed events on the model to update the UI
model.IdealBMIChanged += (sender, e) => {
idealBMIElement.Value = e.IdealBMI.ToString();
};
model.IdealWeightChanged += (sender, e) => {
idealWeightElement.Value = e.IdealWeight.ToString();
};
// Since Ideal BMI has to be calculated based on the Ideal weight, set all the fields in
// the controller that are used for calcaulation
idealWeightElement.Changed += (sender, e) => {
controller.SetWeight(StringToNumberUtility.GetDouble(weightElement.Value, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(heightElement.Value, 0.00));
controller.SetIdealWeight(StringToNumberUtility.GetDouble(idealWeightElement.Value, 0.00));
};
idealBMIElement.Changed += (sender, e) => {
controller.SetWeight(StringToNumberUtility.GetDouble(weightElement.Value, 0.00));
controller.SetHeight(StringToNumberUtility.GetDouble(heightElement.Value, 0.00));
controller.SetIdealBMI(StringToNumberUtility.GetDouble(idealBMIElement.Value, 0.00));
};
calculateButtonElement.Alignment = UITextAlignment.Center;
}