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112 lines
2.3 KiB
Plaintext
112 lines
2.3 KiB
Plaintext
/**
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* Loading XML Data
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* by Daniel Shiffman.
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*
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* This example demonstrates how to use loadJSON()
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* to retrieve data from a JSON file and make objects
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* from that data.
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*
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* Here is what the JSON looks like (partial):
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*
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{
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"bubbles": [
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{
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"position": {
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"x": 160,
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"y": 103
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},
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"diameter": 43.19838,
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"label": "Happy"
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},
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{
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"position": {
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"x": 372,
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"y": 137
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},
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"diameter": 52.42526,
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"label": "Sad"
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}
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]
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}
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*/
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// An Array of Bubble objects
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Bubble[] bubbles;
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// A JSON object
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JSONObject json;
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void setup() {
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size(640, 360);
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loadData();
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}
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void draw() {
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background(255);
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// Display all bubbles
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for (Bubble b : bubbles) {
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b.display();
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b.rollover(mouseX, mouseY);
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}
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//
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textAlign(LEFT);
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fill(0);
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text("Click to add bubbles.", 10, height-10);
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}
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void loadData() {
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// Load JSON file
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// Temporary full path until path problem resolved.
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json = loadJSONObject("data.json");
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JSONArray bubbleData = json.getJSONArray("bubbles");
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// The size of the array of Bubble objects is determined by the total XML elements named "bubble"
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bubbles = new Bubble[bubbleData.size()];
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for (int i = 0; i < bubbleData.size(); i++) {
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// Get each object in the array
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JSONObject bubble = bubbleData.getJSONObject(i);
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// Get a position object
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JSONObject position = bubble.getJSONObject("position");
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// Get x,y from position
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int x = position.getInt("x");
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int y = position.getInt("y");
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// Get diamter and label
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float diameter = bubble.getFloat("diameter");
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String label = bubble.getString("label");
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// Put object in array
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bubbles[i] = new Bubble(x, y, diameter, label);
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}
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}
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void mousePressed() {
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// Create a new JSON bubble object
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JSONObject newBubble = new JSONObject();
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// Create a new JSON position object
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JSONObject position = new JSONObject();
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position.setInt("x", mouseX);
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position.setInt("y", mouseY);
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// Add position to bubble
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newBubble.setJSONObject("position", position);
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// Add diamater and label to bubble
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newBubble.setFloat("diameter", random(40, 80));
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newBubble.setString("label", "New label");
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// Append the new JSON bubble object to the array
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JSONArray bubbleData = json.getJSONArray("bubbles");
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bubbleData.append(newBubble);
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if (bubbleData.size() > 10) {
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bubbleData.remove(0);
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}
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// Save new data
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saveJSONObject(json,"data/data.json");
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loadData();
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}
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