working on JSON example using java JSON objects in the interim

2026-01-31 04:11:07 +01:00 · 2013-04-05 15:56:34 -04:00
parent ae312eee2d
commit fa30e6b830
3 changed files with 202 additions and 0 deletions
--- a/Data/LoadSaveJSONTest/LoadSaveJSONTest.pde
+++ b/Data/LoadSaveJSONTest/LoadSaveJSONTest.pde
@@ -0,0 +1,126 @@
+/**
+ * Loading XML Data
+ * by Daniel Shiffman.  
+ * 
+ * This example demonstrates how to use loadJSON()
+ * to retrieve data from a JSON file and make objects 
+ * from that data.
+ *
+ * Here is what the JSON looks like (partial):
+ *
+{
+  "bubbles": [
+      {
+        "position": {
+          "x": 160,
+          "y": 103
+        },
+        "diameter": 43.19838,
+        "label": "Happy"
+      },
+      {
+        "position": {
+          "x": 372,
+          "y": 137
+        },
+        "diameter": 52.42526,
+        "label": "Sad"
+      }
+    ]
+}
+ */
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+// An Array of Bubble objects
+Bubble[] bubbles;
+// A Table object
+JSONObject json;
+
+void setup() {
+  size(640, 360);
+  loadData();
+}
+
+void draw() {
+  background(255);
+  // Display all bubbles
+  for (Bubble b : bubbles) {
+    b.display();
+    b.rollover(mouseX, mouseY);
+  }
+  //
+  //  textAlign(LEFT);
+  //  fill(0);
+  //  text("Click to add bubbles.", 10, height-10);
+}
+
+void loadData() {
+  // Load JSON file
+  String jsonString = join(loadStrings("data.json"), "\n");
+  //println(jsonString);
+
+  try {
+    json =  new JSONObject(jsonString);
+    JSONArray bubbleData = json.getJSONArray("bubbles");
+
+    // The size of the array of Bubble objects is determined by the total XML elements named "bubble"
+    bubbles = new Bubble[bubbleData.length()]; 
+
+    for (int i = 0; i < bubbleData.length(); i++) {
+      JSONObject bubble = bubbleData.getJSONObject(i); 
+      JSONObject position = bubble.getJSONObject("position");
+      int x = position.getInt("x");
+      int y = position.getInt("y");
+
+      float diameter = (float)bubble.getDouble("diameter");
+      String label = bubble.getString("label");
+
+      bubbles[i] = new Bubble(x, y, diameter, label);
+    }
+  } 
+  catch (JSONException e) {
+    e.printStackTrace();
+  }
+}
+
+// Still need to work on adding and deleting
+
+void mousePressed() {
+
+  // Create a new XML bubble element
+  //  XML bubble = xml.addChild("bubble");
+  //  
+  //  // Set the poisition element
+  //  XML position = bubble.addChild("position");
+  //  // Here we can set attributes as integers directly
+  //  position.setInt("x",mouseX);
+  //  position.setInt("y",mouseY);
+  //  
+  //  // Set the diameter element
+  //  XML diameter = bubble.addChild("diameter");
+  //  // Here for a node's content, we have to convert to a String
+  //  diameter.setContent("" + random(40,80));
+  //  
+  //  // Set a label
+  //  XML label = bubble.addChild("label");
+  //  label.setContent("New label");
+  //  
+  //  
+  //  // Here we are removing the oldest bubble if there are more than 10
+  //  XML[] children = xml.getChildren("bubble");
+  //    // If the XML file has more than 10 bubble elements
+  //  if (children.length > 10) {
+  //    // Delete the first one
+  //    xml.removeChild(children[0]);
+  //  }
+  //  
+  //  // Save a new XML file
+  //  saveXML(xml,"data/data.xml");
+  //  
+  //  // reload the new data 
+  //  loadData();
+}
+