Typica/config/Windows/editinventorytransaction.xml

<window id="editinventorytransaction">
	<layout type="vertical">
		<layout type="horizontal">
			<label>Time:</label>
			<line id="time" writable="false" />
			<label>Item:</label>
			<line id="item" writable="false" />
			<label>Quantity:</label>
			<line id="quantity" />
		</layout>
		<layout type="horizontal">
			<button id="delete" name="Delete Transaction" type="push" />
			<stretch />
			<button id="save" name="Save Changes" type="push" />
		</layout>
	</layout>
	<program>
		<![CDATA[
			var window = this;
			var w = window;
			this.windowTitle = TTR("editinventorytransaction", "Typica - Edit Inventory Transaction");
			timeField = findChildObject(this, 'time');
			itemField = findChildObject(this, 'item');
			quantityField = findChildObject(this, 'quantity');
			deleteButton = findChildObject(this, 'delete');
			saveButton = findChildObject(this, 'save');
			this.loadTransaction = function(item, timestamp) {
				w.itemID = item;
				w.timestamp = timestamp;
				timeField.text = timestamp;
				itemField.text = item;
				var query = new QSqlQuery();
				query.prepare("SELECT quantity FROM inventory WHERE time = :timestamp AND item = :item");
				query.bind(":timestamp", timestamp);
				query.bind(":item", item);
				query.exec();
				if(query.next()) {
					quantityField.text = query.value(0);
				}
                query = query.invalidate();
			};
			saveButton.clicked.connect(function() {
				var query = new QSqlQuery();
				query.prepare("UPDATE inventory SET quantity = :quantity WHERE item = :item AND time = :timestamp");
				query.bind(":quantity", Number(quantityField.text));
				query.bind(":item", Number(itemField.text));
				query.bind(":timestamp", timeField.text);
				query.exec();
				query.prepare("UPDATE items SET quantity = (SELECT balance FROM item_history(:item) ORDER BY time DESC LIMIT 1) WHERE id = :item2");
				query.bind(":item", Number(itemField.text));
				query.bind(":item2", Number(itemField.text));
				query.exec();
				query = query.invalidate();
				window.close();
			});
			deleteButton.clicked.connect(function() {
				var proceed = displayWarning(TTR("editinventorytransaction", "Are you sure?"), TTR("editinventorytransaction", "Deleting this transaction can not be undone. Continue?"));
				if(proceed) {
					var query = new QSqlQuery();
					query.prepare("DELETE FROM inventory WHERE item = :item AND time = :timestamp");
					query.bind(":item", Number(itemField.text));
					query.bind(":timestamp", timeField.text);
					query.exec();
					query.prepare("UPDATE items SET quantity = (SELECT balance FROM item_history(:item) ORDER BY time DESC LIMIT 1) WHERE id = :item2");
					query.bind(":item", Number(itemField.text));
					query.bind(":item2", Number(itemField.text));
					query.exec();
					query = query.invalidate();
					window.close();
				}
			});
		]]>
	</program>
</window>