Using a Picker to set new value

source/picker/HomeAssistantNumericPicker.mc

@@ -0,0 +1,102 @@
+//-----------------------------------------------------------------------------------
+//
+// Distributed under MIT Licence
+//   See https://github.com/house-of-abbey/GarminHomeAssistant/blob/main/LICENSE.
+//
+//-----------------------------------------------------------------------------------
+//
+// GarminHomeAssistant is a Garmin IQ application written in Monkey C and routinely
+// tested on a Venu 2 device. The source code is provided at:
+//            https://github.com/house-of-abbey/GarminHomeAssistant.
+//
+// P A Abbey & J D Abbey & Someone0nEarth, 31 October 2023
+//
+//------------------------------------------------------------
+
+using Toybox.Application;
+using Toybox.Lang;
+using Toybox.Graphics;
+using Toybox.System;
+using Toybox.WatchUi;
+
+//! Picker that allows the user to choose a float value
+class HomeAssistantNumericPicker extends WatchUi.Picker {
+
+    private var mFactory as HomeAssistantNumericFactory;
+    private var mItem as HomeAssistantNumericMenuItem;
+
+    //! Constructor
+    public function initialize(factory as HomeAssistantNumericFactory, haItem as HomeAssistantNumericMenuItem) {
+
+        mFactory = factory;
+
+
+        var pickerOptions = {:pattern=>[mFactory]};
+        mItem=haItem;
+
+
+        var data = mItem.getData();
+
+        var start = 0.0;
+        var val = data.get("start");
+        if (val != null) {
+            start = val.toString().toFloat();
+        } 
+        var step = 1.0;
+        val = data.get("step");
+        if (val != null) {
+            step = val.toString().toFloat();
+        } 
+        val = haItem.getSubLabel().toFloat();
+        var index = ((val -start) / step).toNumber();
+
+        pickerOptions[:defaults]  =[index];
+
+        var title = new WatchUi.Text({:text=>haItem.getLabel(), :locX=>WatchUi.LAYOUT_HALIGN_CENTER,
+                :locY=>WatchUi.LAYOUT_VALIGN_BOTTOM});
+        pickerOptions[:title] = title;
+
+
+        Picker.initialize(pickerOptions);
+
+    }
+
+
+    //! Get whether the user is done picking
+    //! @param value Value user selected
+    //! @return true if user is done, false otherwise
+    public function onConfirm(value as Lang.String) as Void {
+        mItem.setValue(value);
+        mItem.callService();
+    }
+
+    
+}
+
+//! Responds to a numeric  picker selection or cancellation
+class HomeAssistantNumericPickerDelegate extends WatchUi.PickerDelegate {
+    private var mPicker as HomeAssistantNumericPicker;
+
+    //! Constructor
+    public function initialize(picker as HomeAssistantNumericPicker) {
+        PickerDelegate.initialize();
+        mPicker = picker;
+    }
+
+    //! Handle a cancel event from the picker
+    //! @return true if handled, false otherwise
+    public function onCancel() as Lang.Boolean {
+        WatchUi.popView(WatchUi.SLIDE_RIGHT);
+        return true;
+    }
+
+    //! Handle a confirm event from the picker
+    //! @param values The values chosen in the picker
+    //! @return true if handled, false otherwise
+    public function onAccept(values as Lang.Array) as Lang.Boolean {
+        var chosenValue = values[0].toString();
+        mPicker.onConfirm(chosenValue);
+        WatchUi.popView(WatchUi.SLIDE_RIGHT);
+        return true;
+    }
+}