notizheftanzeiger/Interaction.pde

void mousePressed() {
  interactive = true;
  startInteractionTime = millis();
  if (timeline.hovering()) {
    timeline.clicked = true;
    timelinectrl();
  } else {
    nextSlide(interactMode);
  }
}
void mouseReleased() {
  if (timeline.clicked) {
    timeline.clicked = false;
    timelinectrl();
  }
}
int currentYear;
void timelinectrl() {
  if (interactiveTimeline && displayTimeline) {
    int toYear = (int)constrain(map(mouseX, timeline.x, timeline.x + timeline.l, 1966, 2012), 1966, 2012);
    if (toYear != currentYear) {
      timeline.cursorPos = constrain(mouseX, timeline.x, timeline.x +timeline.l);
      boolean succ = false;
      for (int i = 0; i < notebooks.size(); i ++) {
        if (notebooks.get(i).year == toYear) {
          nextSlide(i, 0);
          succ = true;
          break;
        }
      }
      if (!succ) {
        for (int i = 0; i < notebooks.size(); i ++) {
          if (notebooks.get(i).year == toYear-1 || notebooks.get(i).year == toYear+1) {
            nextSlide(i, 0);
            succ = true;
            break;
          }
        }
      }
    }
  }
}

class Timeline { //currently timeline has to be from left to right to work
  int x, y, l, cursorPos;
  boolean clicked;
  Timeline(int x_, int y_, int l_) {
    x = x_;
    y = y_;
    l = l_;
  }
  boolean hovering() {
    if (mouseX > x - 20 && mouseX < x + l + 20 && mouseY > y - 20 && mouseY < y + 20) {
      return true;
    } else {
      return false;
    }
  }
  void update() {
    cursorPos = (int)map(notebooks.get(currentNotebookNo).year, 1966, 2012, 50, width-50);
  }
  void display() {
    stroke(255, 127);
    strokeWeight(4);
    line(x, y, l+x, y);
    if (clicked) {
      cursorPos = (int)constrain(mouseX, x, x+l);
    }
    ellipse(cursorPos, height-30, 20, 20);
    if (displayText){
      String labelText;
      if(!clicked) labelText = str(notebooks.get(currentNotebookNo).year);
      else labelText = str((int)constrain(map(mouseX, timeline.x, timeline.x + timeline.l, 1966, 2012), 1966, 2012));
      text(labelText, cursorPos, y-20);
    }
  }
}