From 849904458a65526e50877be65bf6ad0b0acc60ab Mon Sep 17 00:00:00 2001
From: Krisjanis Rijnieks <krisjanis.rijnieks@gmail.com>
Date: Fri, 20 Jan 2017 21:04:48 +0200
Subject: [PATCH] Map backspace to eraseSurface(). Erase last created.

---
 .../bin/data/ofxpimapper.xml                  | 123 +++++++++++++++++-
 example-custom-shortcuts/src/ofApp.cpp        |   2 +
 2 files changed, 119 insertions(+), 6 deletions(-)

diff --git a/example-custom-shortcuts/bin/data/ofxpimapper.xml b/example-custom-shortcuts/bin/data/ofxpimapper.xml
index 356bec7..259e4f7 100644
--- a/example-custom-shortcuts/bin/data/ofxpimapper.xml
+++ b/example-custom-shortcuts/bin/data/ofxpimapper.xml
@@ -2,16 +2,16 @@
     <surface type="0">
         <vertices>
             <vertex>
-                <x>400.000000000</x>
-                <y>50.000000000</y>
+                <x>347.000000000</x>
+                <y>-19.000000000</y>
             </vertex>
             <vertex>
-                <x>750.000000000</x>
-                <y>400.000000000</y>
+                <x>697.000000000</x>
+                <y>331.000000000</y>
             </vertex>
             <vertex>
-                <x>50.000000000</x>
-                <y>400.000000000</y>
+                <x>-3.000000000</x>
+                <y>331.000000000</y>
             </vertex>
         </vertices>
         <texCoords>
@@ -33,4 +33,115 @@
             <source-name>image1.jpg</source-name>
         </source>
     </surface>
+    <surface type="1">
+        <vertices>
+            <vertex>
+                <x>283.000000000</x>
+                <y>34.000000000</y>
+            </vertex>
+            <vertex>
+                <x>983.000000000</x>
+                <y>34.000000000</y>
+            </vertex>
+            <vertex>
+                <x>983.000000000</x>
+                <y>384.000000000</y>
+            </vertex>
+            <vertex>
+                <x>283.000000000</x>
+                <y>384.000000000</y>
+            </vertex>
+        </vertices>
+        <texCoords>
+            <texCoord>
+                <x>0.000000000</x>
+                <y>0.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>1.000000000</x>
+                <y>0.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>1.000000000</x>
+                <y>1.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>0.000000000</x>
+                <y>1.000000000</y>
+            </texCoord>
+        </texCoords>
+        <source>
+            <source-type>none</source-type>
+            <source-name>none</source-name>
+        </source>
+        <properties>
+            <perspectiveWarping>1</perspectiveWarping>
+        </properties>
+    </surface>
+    <surface type="3">
+        <vertices>
+            <vertex>
+                <x>483.000000000</x>
+                <y>325.000000000</y>
+            </vertex>
+            <vertex>
+                <x>349.666656494</x>
+                <y>100.000000000</y>
+            </vertex>
+            <vertex>
+                <x>616.333312988</x>
+                <y>100.000000000</y>
+            </vertex>
+            <vertex>
+                <x>883.000000000</x>
+                <y>325.000000000</y>
+            </vertex>
+            <vertex>
+                <x>616.333312988</x>
+                <y>550.000000000</y>
+            </vertex>
+            <vertex>
+                <x>349.666656494</x>
+                <y>550.000000000</y>
+            </vertex>
+            <vertex>
+                <x>83.000000000</x>
+                <y>325.000000000</y>
+            </vertex>
+        </vertices>
+        <texCoords>
+            <texCoord>
+                <x>0.500000000</x>
+                <y>0.500000000</y>
+            </texCoord>
+            <texCoord>
+                <x>0.333333343</x>
+                <y>0.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>0.666666687</x>
+                <y>0.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>1.000000000</x>
+                <y>0.500000000</y>
+            </texCoord>
+            <texCoord>
+                <x>0.666666687</x>
+                <y>1.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>0.333333343</x>
+                <y>1.000000000</y>
+            </texCoord>
+            <texCoord>
+                <x>0.000000000</x>
+                <y>0.500000000</y>
+            </texCoord>
+        </texCoords>
+        <source>
+            <source-type>none</source-type>
+            <source-name>none</source-name>
+        </source>
+    </surface>
 </surfaces>
diff --git a/example-custom-shortcuts/src/ofApp.cpp b/example-custom-shortcuts/src/ofApp.cpp
index 0c40da5..554e7e1 100644
--- a/example-custom-shortcuts/src/ofApp.cpp
+++ b/example-custom-shortcuts/src/ofApp.cpp
@@ -30,6 +30,8 @@ void ofApp::keyPressed(int key){
 		mapper.createSurface(ofx::piMapper::GRID_WARP_SURFACE);
 	}else if(key == 't'){
 		mapper.createSurface(ofx::piMapper::TRIANGLE_SURFACE);
+	}else if(key == OF_KEY_BACKSPACE){
+		mapper.eraseSurface(mapper.getNumSurfaces() - 1);
 	}else{
 		mapper.keyPressed(key);
 	}