python - Mouse event in DrawingArea with PyGtk -

-

i want x , y coordinates when click on drawingarea. looking examples , found code following

import gtk  class ventana(gtk.window):      def __init__(self):         super(ventana, self).__init__()          self.set_title('test')         self.set_size_request(800, 600)         self.set_position(gtk.win_pos_center)         self.connect('destroy', gtk.main_quit)          self.drawing_area = gtk.drawingarea()         self.drawing_area.set_size_request(780, 500)         self.drawing_area.modify_bg(gtk.state_normal, gtk.gdk.color_parse('white'))         self.drawing_area.connect('button-press-event', self.on_drawing_area_button_press)          fixed = gtk.fixed()         fixed.put(self.drawing_area, 10, 10)          self.add(fixed)          self.show_all()      def on_drawing_area_button_press(self, widget, event):         print event.x, ' ', event.y   def main():     ventana()     gtk.main()  if __name__ == '__main__':     main()

when run it, window appears , drawingarea white background, when click on it, doesn't print values of event.x , event.y , there no error messages.

can tell me correct way that?

thanks answering.

the drawing area needs setup event masks events want connect it.

self.drawing_area.set_events(gtk.gdk.button_press_mask)

see: http://www.pygtk.org/pygtk2tutorial/sec-eventhandling.html (which has example @ bottom of page)


Comments

Post a Comment

Popular posts from this blog

c++ - OpenCV Error: Assertion failed <scn == 3 ::scn == 4> in unknown function, -

-
i read alot other solution still confused should mine... #include <opencv2/objdetect/objdetect.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream> #include <stdio.h> using namespace std; using namespace cv; int main(int argc, const char** argv) { //create cascade classifier object used face detection cascadeclassifier face_cascade; //use haarcascade_frontalface_alt.xml library face_cascade.load("haarcascade_frontalface_alt.xml"); //setup video capture device , link first capture device videocapture capturedevice; capturedevice.open(0); //setup image files used in capture process mat captureframe; mat grayscaleframe; //create window present results namedwindow("outputcapture", 1); //create loop capture , find faces while (true) { //capture new image frame capturedevice >> captureframe; ...
Read more

php - render data via PDO::FETCH_FUNC vs loop -

-
i've been using 2 methods render data. the first one: function name($id,$name){ return '<div id="'.$id.'">'.$name.'</div>'; } echo implode($pdo->query("select id,name user")->fetchall(pdo::fetch_func,'name')); the second one: $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); foreach($users $user){ echo name($user->id,$user->name); } i don't understand how pdo::fetch_func works. tried figure out. however, not well-documented. could please explain fetch mode? , also, 1 performs better? thank you. both methods wrong , have learn how use templates , how separate business logic presentation logic. $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); tpl::assign('users', $users); is code business logic part. then in template <?php foreach $users $row): ?> <div id="<?=$...
Read more

The canvas has been tainted by cross-origin data in chrome only -

-
uncaught securityerror: failed execute 'getimagedata' on 'canvasrenderingcontext2d': canvas has been tainted cross-origin data i getting above error in chrome. code(following) works fine in mozilla. have not corss domain issue. why above error in chrome? var wheel_canvas, wheel_context, can_w, can_h, wheel_grd; var large_radius = 160; var small_radius = 120; var wheel_canvas = document.getelementbyid('wheel_canvas'); var wheel_context = wheel_canvas.getcontext('2d'); var can_w = $(wheel_canvas).width(); var can_h = $(wheel_canvas).height(); var centerx = can_w / 2, centery = can_h / 2; var wheel_grd = null; test('#ff0000'); function test(hex) { $('#clrpicker').css({'left': 210, 'top': 210 }); inverted = hexbw(hex); $('#color_val_show').val(hex); current_color_hex_val_selected = hex; $('#color_val_show').css({'color':inverted,'background':hex}); fillgradient...
Read more