From 63fe91180b700a6904f3b487fae949e266b71a0e Mon Sep 17 00:00:00 2001
From: Derek Brown <derek@allderek.com>
Date: Fri, 19 May 2017 19:18:54 -0400
Subject: [PATCH] Add image_onclick option (#1080)

---
 core/field_image.js | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/core/field_image.js b/core/field_image.js
index 09ee479ac..e5177e63e 100644
--- a/core/field_image.js
+++ b/core/field_image.js
@@ -38,10 +38,11 @@ goog.require('goog.userAgent');
  * @param {number} width Width of the image.
  * @param {number} height Height of the image.
  * @param {string=} opt_alt Optional alt text for when block is collapsed.
+ * @param {function=} opt_onclick Optional function to be called when image is clicked
  * @extends {Blockly.Field}
  * @constructor
  */
-Blockly.FieldImage = function(src, width, height, opt_alt) {
+Blockly.FieldImage = function(src, width, height, opt_alt, opt_onclick) {
   this.sourceBlock_ = null;
 
   // Ensure height and width are numbers.  Strings are bad at math.
@@ -51,6 +52,11 @@ Blockly.FieldImage = function(src, width, height, opt_alt) {
       this.height_ + 2 * Blockly.BlockSvg.INLINE_PADDING_Y);
   this.text_ = opt_alt || '';
   this.setValue(src);
+
+  if(typeof opt_onclick === "function"){
+    this.clickHandler_ = opt_onclick;
+  }
+
 };
 goog.inherits(Blockly.FieldImage, Blockly.Field);
 
@@ -153,6 +159,7 @@ Blockly.FieldImage.prototype.setText = function(alt) {
 Blockly.FieldImage.prototype.render_ = function() {
   // NOP
 };
+
 /**
  * Images are fixed width, no need to update.
  * @private
@@ -160,3 +167,14 @@ Blockly.FieldImage.prototype.render_ = function() {
 Blockly.FieldImage.prototype.updateWidth = function() {
  // NOP
 };
+
+/**
+ * If field click is called, and click handler defined,
+ * call the handler.
+ * @private
+ */
+ Blockly.FieldImage.prototype.showEditor = function(){
+   if(typeof this.clickHandler_ === "function"){
+     this.clickHandler_(this);
+   }
+ }