Pygame mouse clicking detection

Question

I was wondering how to write code that would detect the mouse clicking on a sprite  For example   if  Function that checks for mouse clicked on Sprite      print   You have opened a chest

User · Answer

I was looking for the same answer to this question and after much head scratching this is the answer I came up with   Python 3 4 3 with Pygame import pygame  pygame init   pygame display set caption  Crash    window   pygame display set mode  300  300       Draw Once Rectplace   pygame draw rect window   255  0  0   100  100  100  100   pygame display update     Main Loop while True        Mouse position and button clicking      pos   pygame mouse get pos       pressed1  pressed2  pressed3   pygame mouse get pressed         Check if the rect collided with the mouse pos       and if the left mouse button was pressed      if Rectplace collidepoint pos  and pressed1          print  quot You have opened a chest  quot         Quit pygame              for event in pygame event get            if event type    pygame QUIT              pygame quit               quit 1

User · Answer

I assume your game has a main loop  and all your sprites are in a list called sprites   In your main loop  get all events  and check for the MOUSEBUTTONDOWN or MOUSEBUTTONUP event   while       your main loop     get all events   ev   pygame event get        proceed events   for event in ev         handle MOUSEBUTTONUP     if event type    pygame MOUSEBUTTONUP        pos   pygame mouse get pos            get a list of all sprites that are under the mouse cursor       clicked sprites    s for s in sprites if s rect collidepoint pos           do something with the clicked sprites      So basically you have to check for a click on a sprite yourself every iteration of the mainloop  You ll want to use mouse get pos   and rect collidepoint     Pygame does not offer event driven programming  as e g  cocos2d does   Another way would be to check the position of the mouse cursor and the state of the pressed buttons  but this approach has some issues   if pygame mouse get pressed   0  and mysprite rect collidepoint pygame mouse get pos       print   You have opened a chest      You ll have to introduce some kind of flag if you handled this case  since otherwise this code will print  You have opened a chest   every iteration of the main loop   handled   False  while        your loop    if pygame mouse get pressed   0  and mysprite rect collidepoint pygame mouse get pos    and not handled      print   You have opened a chest        handled   pygame mouse get pressed   0    Of course you can subclass Sprite and add a method called is clicked like this   class MySprite Sprite            def is clicked self       return pygame mouse get pressed   0  and self rect collidepoint pygame mouse get pos      So  it s better to use the first approach IMHO

User · Answer

The pygame documentation for mouse events is here  You can either use the pygame mouse get pressed method in collaboration with the pygame mouse get pos  if needed   But please use the mouse click event via a main event loop  The reason why the event loop is better is due to  short clicks   You may not notice these on normal machines  but computers that use tap-clicks on trackpads have excessively small click periods  Using the mouse events will prevent this   EDIT  To perform pixel perfect collisions use pygame sprite collide rect   found on their docs for sprites

User · Answer

The MOUSEBUTTONDOWN event occurs once when you click the mouse button and the MOUSEBUTTONUP event occurs once when the mouse button is released  The pygame event Event   object has two attributes that provide information about the mouse event  pos is a tuple that stores the position that was clicked  button stores the button that was clicked  Each mouse button is associated a value  For instance the value of the attributes is 1  2  3  4  5 for the left mouse button  middle mouse button  right mouse button  mouse wheel up respectively mouse wheel down  When multiple keys are pressed  multiple mouse button events occur  Further explanations can be found in the documentation of the module pygame event  Use the rect attribute of the pygame sprite Sprite object and the collidepoint method to see if the Sprite was clicked  Pass the list of events to the update method of the pygame sprite Group so that you can process the events in the Sprite class  class SpriteObject pygame sprite Sprite                    def update self  event list            for event in event list              if event type    pygame MOUSEBUTTONDOWN                  if self rect collidepoint event pos                                my sprite   SpriteObject   group   pygame sprite Group my sprite            run   True while run      event list   pygame event get       for event in event list          if event type    pygame QUIT              run   False       group update event list                Minimal example   repl it  Rabbid76 PyGame-MouseClick  import pygame  class SpriteObject pygame sprite Sprite       def   init   self  x  y  color           super     init              self original image   pygame Surface  50  50   pygame SRCALPHA          pygame draw circle self original image  color   25  25   25          self click image   pygame Surface  50  50   pygame SRCALPHA          pygame draw circle self click image  color   25  25   25          pygame draw circle self click image   255  255  255    25  25   25  4          self image   self original image          self rect   self image get rect center    x  y           self clicked   False      def update self  event list           for event in event list              if event type    pygame MOUSEBUTTONDOWN                  if self rect collidepoint event pos                       self clicked   not self clicked          self image   self click image if self clicked else self original image  pygame init   window   pygame display set mode  300  300   clock   pygame time Clock    sprite object   SpriteObject  window get rect   center   128  128  0   group   pygame sprite Group       SpriteObject window get width      3  window get height      3   128  0  0        SpriteObject window get width     2    3  window get height      3   0  128  0        SpriteObject window get width      3  window get height     2    3   0  0  128        SpriteObject window get width     2   3  window get height     2    3   128  128  0        run   True while run      clock tick 60      event list   pygame event get       for event in event list          if event type    pygame QUIT              run   False       group update event list       window fill 0      group draw window      pygame display flip    pygame quit   exit    See further Creating multiple sprites with different update   s from the same sprite class in Pygame  The current position of the mouse can be determined via pygame mouse get pos    The return value is a tuple that represents the x and y coordinates of the mouse cursor  pygame mouse get pressed   returns a list of Boolean values   that represent the state  True or False  of all mouse buttons  The state of a button is True as long as a button is held down  When multiple buttons are pressed  multiple items in the list are True  The 1st  2nd and 3rd elements in the list represent the left  middle and right mouse buttons  Detect  evaluate the mouse states in the Update method of the pygame sprite Sprite object  class SpriteObject pygame sprite Sprite                    def update self  event list            mouse pos   pygame mouse get pos           mouse buttons   pygame mouse get pressed            if  self rect collidepoint mouse pos  and any mouse buttons                        my sprite   SpriteObject   group   pygame sprite Group my sprite            run   True while run      for event in pygame event get            if event type    pygame QUIT              run   False      group update event list                Minimal example   repl it  Rabbid76 PyGame-MouseHover  import pygame  class SpriteObject pygame sprite Sprite       def   init   self  x  y  color           super     init              self original image   pygame Surface  50  50   pygame SRCALPHA          pygame draw circle self original image  color   25  25   25          self hover image   pygame Surface  50  50   pygame SRCALPHA          pygame draw circle self hover image  color   25  25   25          pygame draw circle self hover image   255  255  255    25  25   25  4          self image   self original image          self rect   self image get rect center    x  y           self hover   False      def update self           mouse pos   pygame mouse get pos           mouse buttons   pygame mouse get pressed             self hover   self rect collidepoint mouse pos          self hover   self rect collidepoint mouse pos  and any mouse buttons           self image   self hover image if self hover else self original image  pygame init   window   pygame display set mode  300  300   clock   pygame time Clock    sprite object   SpriteObject  window get rect   center   128  128  0   group   pygame sprite Group       SpriteObject window get width      3  window get height      3   128  0  0        SpriteObject window get width     2    3  window get height      3   0  128  0        SpriteObject window get width      3  window get height     2    3   0  0  128        SpriteObject window get width     2   3  window get height     2    3   128  128  0        run   True while run      clock tick 60      for event in pygame event get            if event type    pygame QUIT              run   False       group update        window fill 0      group draw window      pygame display flip    pygame quit   exit

[python] Pygame mouse clicking detection

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