""" This allows a simple component to be moved around the screen. """ from enthought.enable.example_support import DemoFrame, demo_main from enthought.traits.api import Float, Tuple from enthought.enable.api import Component, Container, Pointer, Window class Box(Component): """ The box moves wherever the user clicks and drags. """ normal_pointer = Pointer("arrow") moving_pointer = Pointer("hand") offset_x = Float offset_y = Float fill_color = (0.8, 0.0, 0.1, 1.0) moving_color = (0.0, 0.8, 0.1, 1.0) resizable = "" def _draw_mainlayer(self, gc, view_bounds=None, mode="default"): gc.save_state() if self.event_state == "moving": gc.set_fill_color(self.moving_color) else: gc.set_fill_color(self.fill_color) dx, dy = self.bounds x, y = self.position gc.rect(x, y, dx, dy) gc.fill_path() # draw line around outer box gc.set_stroke_color((0,0,0,1)) gc.rect(self.outer_x, self.outer_y, self.outer_width, self.outer_height) gc.stroke_path() gc.restore_state() return def normal_key_pressed(self, event): print "Key:", event.character def normal_left_down(self, event): self.event_state = "moving" event.window.set_pointer(self.moving_pointer) event.window.set_mouse_owner(self, event.net_transform()) self.offset_x = event.x - self.x self.offset_y = event.y - self.y event.handled = True return def moving_mouse_move(self, event): self.position = [event.x-self.offset_x, event.y-self.offset_y] event.handled = True self.request_redraw() return def moving_left_up(self, event): self.event_state = "normal" event.window.set_pointer(self.normal_pointer) event.window.set_mouse_owner(None) event.handled = True self.request_redraw() return def moving_mouse_leave(self, event): self.moving_left_up(event) event.handled = True return class MyFrame(DemoFrame): def _create_window(self): box = Box(bounds=[100,100], position=[50,50], padding=15) return Window(self, -1, component=box) if __name__ == "__main__": demo_main(MyFrame, title="Click and drag to move the box") # EOF