/// <summary>
/// Start the QR-scan page (ZXing library). Will add the scan result to history and execute the Javascript-function on the webpage.
/// </summary>
public void StartScan()
{
//////////////// TEST
CustomScanPage customPage = new CustomScanPage();
customPage.Disappearing += (s, e) =>
{
ZXing.Result result = customPage.result;
if (result != null)
{
ScanHistory.Add(result.Text);
InjectJSQRCode(result.Text);
if (Parameters.Options.UseLocation)
{
OpenJSFunctionLocation();
}
}
Parameters.TemporaryOptions.ResetOptions();
};
if (Parameters.Options.UseLocation)
{
QRLocation.InitLocation();
}
NavigateTo(customPage);
//await App.Current.MainPage.Navigation.PushModalAsync(customPage);
}
/// <summary>
/// Execute the callback function in the webpage, passing the current location.
/// </summary>
/// <param name="scanCode">Code or text parsed from barcode</param>
public void OpenJSFunctionLocation()
{
string jsString = QRLocation.GenerateJavascriptString();
try
{
WebPageWebView.Eval(jsString);
}
catch (Exception)
{
// BarcodeScanner not available
}
}
public void LoadMainPage(bool baseInit = true)
{
if (baseInit)
{
Language.SetLanguage(Parameters.Options.LanguageIndex); // set language for the app from options
QRPage = new QRMainPage();
}
else
{
QRScanner = new Scanner(); // initialize scanner class (ZXing scanner)
ScanHistory = new History();
if (Parameters.Options.UseLocation)
{
QRLocation.InitLocation();
}
QRPage.Initialize();
}
}
/// <summary>
/// Back button was pressed. If a option was changed, all parameters will be saved.
/// </summary>
/// <returns>true to override the functionality of the default handler.</returns>
/// <remarks>
/// This works on Windows Phones and Android with the back buttons.
/// Under Windows the "back button" must be set as visible (UWP main app).
/// Under iOS a back button must be placed manually somewhere.
/// </remarks>
protected override bool OnBackButtonPressed()
{
if (saveSettings)
{
if (!Parameters.Options.UseLocation && sendLocationSwitch.IsToggled)
{
QRLocation.InitLocation();
}
Parameters.Options.HomePage = webPageValue.Text;
Parameters.Options.Emulation = emulationPicker.SelectedIndex;
Parameters.Options.AcceptBarcode_Code = acceptedCodesSwitch[1].IsToggled;
Parameters.Options.AcceptBarcode_Ean = acceptedCodesSwitch[2].IsToggled;
Parameters.Options.AcceptBarcode_Upc = acceptedCodesSwitch[3].IsToggled;
Parameters.Options.LockPortrait = lockPortraitSwitch.IsToggled;
Parameters.Options.SaveHistory = saveHistorySwitch.IsToggled;
Parameters.Options.LanguageIndex = languagePicker.SelectedIndex;
Parameters.Options.UseLocation = sendLocationSwitch.IsToggled;
}
this.Navigation.PopModalAsync(); // close this page and return the the preview page (main page)
return(true);
}
/// <summary>
/// Execute the callback function in the webpage, passing the current location.
/// </summary>
/// <param name="scanCode">Code or text parsed from barcode</param>
public void OpenJSFunctionLocation()
{
string jsString = QRLocation.GenerateJavascriptString();
QRPage.InjectJS(jsString);
}
private Picker languagePicker; // language option
/// <summary>
/// Constructor. Initialize the page view and the components.
/// </summary>
public OptionsPage()
{
Label webPageText = new Label {
Text = Language.GetText("Option1_1")
};
webPageValue = new Entry {
Text = Parameters.Options.HomePage
};
webPageValue.TextChanged += (s, e) => { saveSettings = true; };
Label emulationModeText = new Label {
Text = Language.GetText("Option2_1")
};
emulationPicker = new Picker {
HorizontalOptions = LayoutOptions.End
};
emulationPicker.Items.Add(Language.GetText("Option2_2"));
emulationPicker.Items.Add("MochaSoft");
emulationPicker.Items.Add("Pic2Shop");
emulationPicker.SelectedIndex = Parameters.Options.Emulation;
emulationPicker.SelectedIndexChanged += (s, e) => { saveSettings = true; };
Label acceptedCodesText = new Label {
Text = Language.GetText("Option3_1")
};
acceptedCodesTexts[0] = new Label {
Text = "QR", WidthRequest = 100, VerticalTextAlignment = TextAlignment.Center
};
acceptedCodesSwitch[0] = new Switch {
IsToggled = true, IsEnabled = false
};
acceptedCodesDesc[0] = new Label {
Text = "QR-Codes", HorizontalTextAlignment = TextAlignment.End
};
acceptedCodesTexts[1] = new Label {
Text = "CODE", WidthRequest = 100, VerticalTextAlignment = TextAlignment.Center
};
acceptedCodesSwitch[1] = new Switch {
IsToggled = Parameters.Options.AcceptBarcode_Code, IsEnabled = true
};
acceptedCodesDesc[1] = new Label {
Text = "Code-39/93/128/bar", HorizontalTextAlignment = TextAlignment.End
};
acceptedCodesTexts[2] = new Label {
Text = "EAN", WidthRequest = 100, VerticalTextAlignment = TextAlignment.Center
};
acceptedCodesSwitch[2] = new Switch {
IsToggled = Parameters.Options.AcceptBarcode_Ean, IsEnabled = true
};
acceptedCodesDesc[2] = new Label {
Text = "Ean 8/13", HorizontalTextAlignment = TextAlignment.End
};
acceptedCodesTexts[3] = new Label {
Text = "UPC", WidthRequest = 100, VerticalTextAlignment = TextAlignment.Center
};
acceptedCodesSwitch[3] = new Switch {
IsToggled = Parameters.Options.AcceptBarcode_Upc, IsEnabled = true
};
acceptedCodesDesc[3] = new Label {
Text = "Upc-A/E/EAN", HorizontalTextAlignment = TextAlignment.End
};
for (int i = 0; i < 4; i++)
{
acceptedCodesSwitch[i].Toggled += (s, e) => { saveSettings = true; };
}
Label lockPortraitText = new Label {
Text = Language.GetText("Option4_1") + " *", HorizontalOptions = LayoutOptions.StartAndExpand, VerticalTextAlignment = TextAlignment.Center
};
lockPortraitSwitch = new Switch {
IsToggled = Parameters.Options.LockPortrait, HorizontalOptions = LayoutOptions.End
};
lockPortraitSwitch.Toggled += (s, e) => { saveSettings = true; };
Label SaveHistoryText = new Label {
Text = Language.GetText("Option5_1") + "*", HorizontalOptions = LayoutOptions.StartAndExpand, VerticalTextAlignment = TextAlignment.Center
};
saveHistorySwitch = new Switch {
IsToggled = Parameters.Options.SaveHistory, HorizontalOptions = LayoutOptions.End
};
saveHistorySwitch.Toggled += (s, e) => { saveSettings = true; };
Label languageText = new Label {
Text = Language.GetText("Option6_1") + " *"
};
languagePicker = new Picker {
HorizontalOptions = LayoutOptions.End
};
languagePicker.Items.Add(Language.GetText("Option6_2"));
languagePicker.Items.Add(Language.GetText("Option6_3"));
languagePicker.Items.Add(Language.GetText("Option6_4"));
languagePicker.SelectedIndex = Parameters.Options.LanguageIndex;
languagePicker.SelectedIndexChanged += (s, e) => { saveSettings = true; };
Label sendLocationText = new Label {
Text = Language.GetText("Option7_1"), HorizontalOptions = LayoutOptions.StartAndExpand, VerticalTextAlignment = TextAlignment.Center
};
sendLocationSwitch = new Switch {
IsToggled = Parameters.Options.UseLocation, HorizontalOptions = LayoutOptions.End
};
sendLocationSwitch.Toggled += (s, e) => {
if (!QRLocation.IsLocationAvailableOnDevice() && sendLocationSwitch.IsToggled)
{
sendLocationSwitch.IsToggled = false;
App.IOS.EnablePermissionLocation();
return;
}
saveSettings = true;
};
Label NeedRestartText = new Label {
Text = "--------------------------\n" + Language.GetText("NeedRestart")
};
StackLayout backbuttonLayout = new StackLayout();
backbuttonLayout.Orientation = StackOrientation.Horizontal;
backbuttonLayout.HorizontalOptions = LayoutOptions.FillAndExpand;
Button backbuttonButton = new Button
{
Text = " < ",
TextColor = Color.Blue,
WidthRequest = 50,
FontSize = 20,
};
backbuttonButton.Clicked += async(s, e) =>
{
OnBackButtonPressed();
var rootPage = new NavigationPage(this);
await rootPage.PopAsync();
};
Label optionTitle = new Label
{
Text = Language.GetText("Settings"),
FontSize = 20,
HorizontalTextAlignment = TextAlignment.Center,
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalTextAlignment = TextAlignment.Center,
VerticalOptions = LayoutOptions.CenterAndExpand,
TextColor = Color.Blue
};
if (Device.RuntimePlatform == Device.iOS)
{
backbuttonLayout.Children.Add(backbuttonButton);
}
backbuttonLayout.Children.Add(optionTitle);
var scrollView = new StackLayout
{
Padding = new Thickness(10),
HorizontalOptions = LayoutOptions.FillAndExpand,
Children =
{
backbuttonLayout,
acceptedCodesText,
new StackLayout
{
Orientation = StackOrientation.Horizontal,
Children =
{
acceptedCodesTexts[0],
acceptedCodesSwitch[0],
acceptedCodesDesc[0]
}
},
new StackLayout
{
Orientation = StackOrientation.Horizontal,
Children =
{
acceptedCodesTexts[1],
acceptedCodesSwitch[1],
acceptedCodesDesc[1]
}
},
new StackLayout
{
Orientation = StackOrientation.Horizontal,
Children =
{
acceptedCodesTexts[2],
acceptedCodesSwitch[2],
acceptedCodesDesc[2]
}
},
new StackLayout
{
Orientation = StackOrientation.Horizontal,
Children =
{
acceptedCodesTexts[3],
acceptedCodesSwitch[3],
acceptedCodesDesc[3]
}
},
webPageText,
webPageValue,
new StackLayout
{
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.FillAndExpand,
Children =
{
lockPortraitText,
lockPortraitSwitch
}
},
new StackLayout
{
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.FillAndExpand,
Children =
{
sendLocationText,
sendLocationSwitch
}
},
new StackLayout
{
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.FillAndExpand,
Children =
{
SaveHistoryText,
saveHistorySwitch
}
},
languageText,
languagePicker,
emulationModeText,
emulationPicker,
NeedRestartText
},
};
Content = new ScrollView {
Content = scrollView
};
}
/// <summary>
/// Constructor. Will initialize the view (for Xamarin), load the parameters and initialize the QR-scanner.
/// </summary>
public App()
{
Instance = this;
QRScanner = new Scanner(); // initialize scanner class (ZXing scanner)
Parameters.LoadHistory(ref History); // load scan results history
if (Parameters.Options.UseLocation)
{
QRLocation.InitLocation();
}
if (!Parameters.Options.SaveHistory)
{
History.Clear(); // clear history if no history should be used
}
Language.SetLanguage(Parameters.Options.LanguageIndex); // set language for the app from options
// create top-bar buttons
InitButtons();
// create webView for the page
WebPageWebView = new WebView
{
Source = new UrlWebViewSource
{
Url = Parameters.Options.HomePage,
},
VerticalOptions = LayoutOptions.FillAndExpand
};
WebPageWebView.Navigating += (sender, /*WebNavigatingEventArgs*/ e) =>
{
// catch the pressed link. If link is a valid app protocol (qr2web, barcodereader, ...) start QR scanner
if (Scanner.IsAppURL(e.Url))
{
e.Cancel = true;
StartScanFromWeb(e.Url.ToString());
}
};
WebPageWebView.SizeChanged += (s, e) =>
{
if (TitleStack.Children.Count == 1)
{
lastWindowUpdate = DateTime.Now;
}
else
{
if ((DateTime.Now - lastWindowUpdate).TotalSeconds > 2)
{
while (TitleStack.Children.Count > 1)
{
TitleStack.Children.RemoveAt(1);
}
lastWindowUpdate = DateTime.Now;
}
}
if (WebPageWebView.Bounds.Width > 200)
{
TitleStack.Children.Add(ScanButton);
}
if (WebPageWebView.Bounds.Width > 400)
{
TitleStack.Children.Add(HomeButton);
}
if (WebPageWebView.Bounds.Width > 500)
{
TitleStack.Children.Add(RefreshButton);
}
if (WebPageWebView.Bounds.Width > 300)
{
TitleStack.Children.Add(HistoryButton);
}
if (WebPageWebView.Bounds.Width > 600)
{
TitleStack.Children.Add(SettingsButton);
}
TitleStack.Children.Add(MoreButton);
};
TitleStack = new StackLayout
{
VerticalOptions = LayoutOptions.Fill,
HorizontalOptions = LayoutOptions.FillAndExpand,
HeightRequest = 45,
Orientation = StackOrientation.Horizontal,
Children =
{
new Label
{
Text = Language.GetText("AppTitleShort"),
HorizontalOptions = LayoutOptions.StartAndExpand,
VerticalOptions = LayoutOptions.Fill,
VerticalTextAlignment = TextAlignment.Center,
TextColor = Color.Yellow
}
}
};
// Don't show button if there is no QR-history
HistoryButton.IsVisible = Parameters.Options.SaveHistory;
// The root page of your application
MainPage = new ContentPage
{
Content = new StackLayout
{
VerticalOptions = LayoutOptions.Fill,
HorizontalOptions = LayoutOptions.Fill,
Children =
{
TitleStack,
WebPageWebView
}
},
Padding = new Thickness(0),
BackgroundColor = Color.Black,
};
NavigationPage.SetHasBackButton(MainPage, false);
NavigationPage.SetHasNavigationBar(MainPage, false);
}