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Python for processing - keyreleased?

netratenetrate
edited August 2017 in Python Mode

I am figuring out some stuff. I have created a small program that uses : keyPressed and keyReleased in a conditional inside the DRAW function. The problem is that PFPython doesn't recognize keyReleased by itself, and it wants it as a function. Why is that? For example, I can use either keyPressed() or keyPressed: -- but I cannot use keyReleased() and keyReleased:

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  • netratenetrate

    ok, here is the code. The challenge I am having is that when the mouse is pressed, it starts to draw - works great. When the keyboard is pressed, it starts to draw, works great as well. The challenge is that if I hold down a key on the keyboard, it will NOT stop drawing. So I am trying to eliminate this issue.

    def setup():
    size(200, 200)
    background(255) # white
    strokeWeight(10)

def draw():
  if mousePressed:
       stroke(155)
       point(mouseX, mouseY)
  elif keyPressed:
       stroke(0,0,255)
       point(mouseX, mouseY)
  • kfrajerkfrajer

    it will NOT stop drawing. So I am trying to eliminate this issue.

    My understanding is that different OS provide different behavior for keyPressed. I believe you can configure this behavior in the configuration menu of your input devices provided by your OS. Regardless of this behavior, the solution is to use keyReleased(). However, I am not sure how the Python mode works so I cannot comment on performance there. What I could do is provide some suggestions.

    Firs of all, mousePressed, as a variable available in many modes. however, mouseReleased does not exist. There is nothing stopping you to implement your own mouseReleased nevertheless. For example, in java I will do:

    final int IDLE=0;
final int MDOWN=1;
final int MUP=1;

int mState=IDLE;

void setup(){size(200,200);}

void draw(){

  if (mousePressed==true){
    mState=MDOWN;
    //Mouse pressed
  }
  else if(mState=MDOWN){
            mState=MUP;
            //Mouse was released
         }

  if(mState==MUP){
    //Released event
    //Set to iddle to wait for next release event (only after a mousePressed)
    mState=IDLE;
  }

}

    I hope this help,

    Kf

  • netratenetrate

    Thank you but I want KEY RELEASED. I think the problem is that when a key is pressed, KEY becomes that ASCII number. I need to convert that number back to NOTHING when the key is released. I think that is what I need.

  • netratenetrate

    I see what you are saying now. I am going to try the boolean, but unfortunately, it ,for some reason, it never makes it to the Keypressed part of the conditional - because I can't get the TEXT to print. Here is what I tried.

    def setup():
    size(200, 200)
    fill(0)
    background(255) # white
    strokeWeight(10)

def draw():
  if mousePressed==True:
       stroke(155)
       point(mouseX, mouseY)
  elif mousePressed==False:
       stroke(0,155,67)
       point(mouseX, mouseY)

  elif keyPressed==True:
      text("keypress",10,50)
      stroke(0,0,255)
      point(mouseX, mouseY)

  elif keyPressed==False:
      text("key no",10,50)
      stroke(255,3,75)
      point(mouseX, mouseY)
  • kfrajerkfrajer

    Your example above doesn't refer to key at all. Try setting the key to zero.

    Kf

    def setup():
    size(200, 200)
    background(255) # white
    strokeWeight(10)

def draw():
  if mousePressed:
       stroke(155)
       point(mouseX, mouseY)

  elif keyPressed:
       stroke(0,0,255)
       point(mouseX, mouseY)
       if(this.key==' '):
           background(0)
           this.key='0'
  • netratenetrate

    Thank you, but it doesn't work if you get rid of the background(0). I want it so that when you hold down a key, it draws. When you release the key (doesn't matter which key at this point), it stops drawing. What you sent me doesn't seem to do that.

  • netratenetrate

    I believe it is finding a way to set this.key to RELEASE. I cannot set it to ZERO or " " because it still considers the key to be pressed for some reason.

  • netratenetrate
    Answer ✓

    Well, I found a work around, using the this.key command you suggested. I am guessing there isn't really a keyRelease that I can use, so I figured a toggle would work better with two keys being "s" for ON and "q" for OFF when it comes to drawing. It seems to work

    def setup():
    size(200, 200)
    background(255) # white
    strokeWeight(10)

def draw():
  if mousePressed:
       stroke(155)
       point(mouseX, mouseY)


  elif this.key=="s":
       print(this.key)
       stroke(0,0,255)
       point(mouseX, mouseY)

  elif this.key=="q":
       print("werW", 40, 50)
  • GoToLoopGoToLoop
    edited August 2017 
    """
 Alien Invader (v2.0.2)
 by Cochraneowns (2013-Apr)
 mod GoToLoop (2017-Aug-04)

 https://Forum.Processing.org/two/discussion/23706/
 python-for-processing-keyreleased#Item_9

 https://Forum.processing.org/one/topic/
 what-websites-work-best-when-using-processing-js.html

 http://Studio.ProcessingTogether.com/sp/pad/export/ro.9Iaf6privOouM
"""

SMOOTH, FPS = 3, 10

def setup():
    size(0300, 0300)
    smooth(SMOOTH)
    frameRate(FPS)

    cursor(CROSS)
    imageMode(CORNER)

    global alien
    alien = respawnAlien()


def draw():
    clear()

    if keyPressed and (key == 's' or key == ' '):
        set(width >> 2, height >> 2, alien)


def mousePressed(): respawnAlien(alien)


def createAlienLayer(w=100, h=100):
    pg = createGraphics(w, h)
    pg.beginDraw()

    pg.smooth(SMOOTH)
    pg.colorMode(HSB, 360, 0200, 1)
    pg.blendMode(REPLACE)
    pg.rectMode(CENTER)
    pg.noStroke()

    pg.endDraw()
    return pg


def respawnAlien(pg=None):
    pg = pg or createAlienLayer()

    pg.beginDraw()
    pg.clear()
    pg.fill(random(360), random(0100, 0200), 1)

    #body:
    pg.rect(50, 30, 50, 10)
    pg.rect(20, 40, 10, 10)
    pg.rect(80, 40, 10, 10)
    pg.rect(10, 55, 10, 20)
    pg.rect(90, 55, 10, 20)
    pg.rect(20, 70, 10, 10)
    pg.rect(80, 70, 10, 10)
    pg.rect(50, 80, 50, 10)
    pg.rect(20, 90, 10, 10)
    pg.rect(80, 90, 10, 10)

    #crown:
    pg.rect(50, 23, 30, 5)
    pg.rect(33, 18, 5, 5)
    pg.rect(67, 18, 5, 5)
    pg.rect(29, 13, 5, 5)
    pg.rect(71, 13, 5, 5)
    pg.rect(50, 18, 11, 5)
    pg.rect(50, 13, 5, 5)

    #face:
    pg.rect(35, 50, 5, 5)
    pg.rect(65, 50, 5, 5)
    pg.rect(50, 65, 20, 5)

    pg.endDraw()
    return pg
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