Qt 5.9 | Qt Quick | QML Advanced Tutorial 2 - Populating the Game Canvas | samegame.js Example File

Qt 5.9.9 Reference Documentation

# samegame.js Example File

tutorials/samegame/samegame2/samegame.js

      var blockSize = 40;
      var maxColumn = 10;
      var maxRow = 15;
      var maxIndex = maxColumn * maxRow;
      var board = new Array(maxIndex);
      var component;

      //Index function used instead of a 2D array
      function index(column, row) {
          return column + (row * maxColumn);
      }

      function startNewGame() {
          //Delete blocks from previous game
          for (var i = 0; i < maxIndex; i++) {
              if (board[i] != null)
                  board[i].destroy();
          }

          //Calculate board size
          maxColumn = Math.floor(background.width / blockSize);
          maxRow = Math.floor(background.height / blockSize);
          maxIndex = maxRow * maxColumn;

          //Initialize Board
          board = new Array(maxIndex);
          for (var column = 0; column < maxColumn; column++) {
              for (var row = 0; row < maxRow; row++) {
                  board[index(column, row)] = null;
                  createBlock(column, row);
              }
          }
      }

      function createBlock(column, row) {
          if (component == null)
              component = Qt.createComponent("Block.qml");

          // Note that if Block.qml was not a local file, component.status would be
          // Loading and we should wait for the component's statusChanged() signal to
          // know when the file is downloaded and ready before calling createObject().
          if (component.status == Component.Ready) {
              var dynamicObject = component.createObject(background);
              if (dynamicObject == null) {
                  console.log("error creating block");
                  console.log(component.errorString());
                  return false;
              }
              dynamicObject.x = column * blockSize;
              dynamicObject.y = row * blockSize;
              dynamicObject.width = blockSize;
              dynamicObject.height = blockSize;
              board[index(column, row)] = dynamicObject;
          } else {
              console.log("error loading block component");
              console.log(component.errorString());
              return false;
          }
          return true;
      }