Mouse 1D

Click on the box and drag it across the screen.

from p5 import *

bx = 0
by = 0
boxSize = 75
overBox = False
locked = False
xOffset = 0.0
yOffset = 0.0

def setup():
        size(640, 360)

        global bx, by
        bx = width/2.0
        by = height/2.0
        rect_mode("RADIUS")

def draw():
        background(0)

        global bx, by, boxSize, overBox, locked, xOffset, yOffset

        # Test if the cursor is over the box
        if (mouse_x > bx-boxSize and mouse_x < bx+boxSize and
                mouse_y > by-boxSize and mouse_y < by+boxSize):
                overBox = True

                if not locked:
                        stroke(255)
                        fill(153)

        else:
                stroke(153)
                fill(153)
                overBox = False

        rect([bx, by], boxSize, boxSize)

def mouse_pressed():
        global bx, by, boxSize, overBox, locked, xOffset, yOffset

        if overBox:
                locked = True
                fill(255, 255, 255)
        else:
                locked = False

        xOffset = mouse_x - bx
        yOffset = mouse_y - by

def mouse_dragged():
        global bx, by, boxSize, overBox, locked, xOffset, yOffset
        if locked:
                bx = mouse_x - xOffset
                by = mouse_y - yOffset

def mouse_released():
        global locked
        locked = False


if __name__ == '__main__':
        run()