[IMP] point_of_sale : add keyboard events on pos product selection interface

Keyboard Shortcuts: Numbers on the keypads (0 to 9), Backspace and Delete

related to task: #33518

closes odoo/odoo#17162

addons/point_of_sale/static/src/js/models.js

@@ -2717,6 +2717,22 @@ exports.NumpadState = Backbone.Model.extend({
         });
         this.trigger('set_value',this.get('buffer'));
     },
+    positiveSign: function() {
+        var oldBuffer;
+        oldBuffer = this.get('buffer');
+        if (oldBuffer[0] === '-'){
+            this.set({buffer: oldBuffer.substr(1)});
+            this.trigger('set_value',this.get('buffer'));
+        }
+    },
+    negativeSign: function() {
+        var oldBuffer;
+        oldBuffer = this.get('buffer');
+        if (oldBuffer[0] !== '-'){
+            this.set({buffer: "-" + oldBuffer});
+            this.trigger('set_value',this.get('buffer'));
+        }
+    },
     changeMode: function(newMode) {
         this.set({
             buffer: "0",
@@ -2730,7 +2746,13 @@ exports.NumpadState = Backbone.Model.extend({
         });
     },
     resetValue: function(){
-        this.set({buffer:'0'});
+        if(this.get('buffer') === "") {
+            this.trigger('set_value','remove');
+        }
+        else {
+            this.set({ buffer: "" });
+            this.trigger('set_value',this.get('buffer'));
+        }
     },
 });
 

addons/point_of_sale/static/src/js/screens.js

@@ -1016,6 +1016,7 @@ var ProductScreenWidget = ScreenWidget.extend({
         if (this.pos.config.iface_vkeyboard && this.chrome.widget.keyboard) {
             this.chrome.widget.keyboard.connect($(this.el.querySelector('.searchbox input')));
         }
+        $(document).on('keydown.productscreen',this._onKeypadKeyDown.bind(this));
     },
 
     close: function(){
@@ -1023,6 +1024,35 @@ var ProductScreenWidget = ScreenWidget.extend({
         if(this.pos.config.iface_vkeyboard && this.chrome.widget.keyboard){
             this.chrome.widget.keyboard.hide();
         }
+        $(document).off('keydown.productscreen',this._onKeypadKeyDown.bind(this));
+    },
+
+    _onKeypadKeyDown: function (ev) {
+        //prevent input and textarea keydown event
+        if(!_.contains(["INPUT", "TEXTAREA"], $(ev.target).prop('tagName'))) {
+            if ((ev.key >= "0" && ev.key <= "9") || ev.key === "."){
+                this.numpad.state.appendNewChar(ev.key)
+            }
+            else {
+                switch (ev.key){
+                    case "Backspace":
+                        this.numpad.state.deleteLastChar();
+                        break;
+                    case "Delete":
+                        this.numpad.state.resetValue();
+                        break;
+                    case ",":
+                        this.numpad.state.appendNewChar(".");
+                        break;
+                    case "+":
+                        this.numpad.state.positiveSign();
+                        break;
+                    case "-":
+                        this.numpad.state.negativeSign();
+                        break;
+                }
+            }
+        }
     },
 });
 gui.define_screen({name:'products', widget: ProductScreenWidget});