add LTO barcode generator App

docs/lto-barcode/paper-size.js

@@ -0,0 +1,49 @@
+let paper_sizes = {
+    a4: {
+	comment: 'A4 (plain)',
+	page_width: 210,
+	page_height: 297,
+    },
+    letter: {
+	comment: 'Letter (plain)',
+	page_width: 215.9,
+	page_height: 279.4,
+    },
+    avery3420: {
+	fixed: true,
+	comment: 'Avery Zweckform 3420',
+	page_width: 210,
+	page_height: 297,
+	label_width: 70,
+	label_height: 17,
+	margin_left: 0,
+	margin_top: 4,
+	column_spacing: 0,
+	row_spacing: 0,
+    },
+}
+
+function paper_size_combo_data() {
+    let data = [];
+
+    for (let [key, value] of Object.entries(paper_sizes)) {
+	data.push({ value: key, text: value.comment });
+    }
+    return data;
+}
+
+Ext.define('PaperSize', {
+    extend: 'Ext.form.field.ComboBox',
+    alias: 'widget.paperSize',
+
+    editable: false,
+
+    displayField: 'text',
+    valueField: 'value',
+    queryMode: 'local',
+
+    store: {
+	field: ['value', 'text'],
+	data: paper_size_combo_data(),
+    },
+});