[Printview] Show Landscape view if columns more than 10 (#3336)

- frappe/erpnext#6596

frappe/public/html/print_template.html

@@ -29,7 +29,11 @@
 			</div>
 		  {% endif %}
 
-		  <div class="print-format">
+		  <div class="print-format {% if landscape %} landscape {% endif %}"
+				{% if columns.length > 20 %}
+					style="font-size: 4.0pt"
+				{% endif %}
+			>
 			  {% if print_settings.letter_head %}
 			  <div {% if print_settings.repeat_header_footer %} id="header-html" class="hidden-pdf" {% endif %}>
 				  <div class="letter-head">{{ print_settings.letter_head.header }}</div>

frappe/public/js/lib/microtemplate.js

@@ -95,6 +95,11 @@ frappe.render_grid = function(opts) {
 		}
 	}
 
+	// show landscape view if columns more than 10
+	if(opts.columns.length > 10) {
+		opts.landscape = true;
+	}
+
 	// render content
 	if(!opts.content) {
 		opts.content = frappe.render_template("print_grid", opts);
@@ -106,6 +111,11 @@ frappe.render_grid = function(opts) {
 	var html = frappe.render_template("print_template", opts);
 
 	var w = window.open();
+
+	if(!w) {
+		frappe.msgprint(__("Please enable pop-ups in your browser"))
+	}
+
 	w.document.write(html);
 	w.document.close();
 }

frappe/templates/styles/standard.css

@@ -12,6 +12,11 @@
 	    margin: auto;
 	}
 
+	.print-format.landscape {
+		max-width: 11.69in;
+		padding: 0.2in;
+	}
+
 	.page-break {
 		padding: 30px 0px;
 		border-bottom: 1px dashed #888;