campy.gui.events.mouse module

Interact with the graphics libraries via mouse events.

• MOUSE_CLICKED
• MOUSE_PRESSED
• MOUSE_RELEASED
• MOUSE_MOVED
• MOUSE_DRAGGED

class campy.gui.events.mouse.GMouseEvent(event_type, gwindow, x, y)

Bases: object

An event generated by some mouse interaction.

Each mouse event records its event type, its parent window, and the mouse coordinate of the event.

# Each mouse event # This event subclass represents a mouse event. Each mouse event # records the event type (MOUSE_PRESSED, # MOUSE_RELEASED, MOUSE_CLICKED, # MOUSE_MOVED, MOUSE_DRAGGED) along # with the coordinates of the event. Clicking the mouse generates # three events in the following order: MOUSE_PRESSED, # MOUSE_RELEASED, MOUSE_CLICKED.

# As an example, the following program uses mouse events to let # the user draw rectangles on the graphics window. The only # complexity in this code is the use of the library functions # min and abs to ensure that the # dimensions of the rectangle are positive:

#     gw = _gwindow.GWindow
#     print("This program lets the user draw rectangles.")
#     while(True):
#         e = gevents.waitForEvent();
#         if (e.getEventType() == MOUSE_PRESSED):
#             startX = e.getX();
#             startY = e.getY();
#             rect = gobjects.GRect(startX, startY, 0, 0);
#             rect.setFilled(True);
#             gw.add(rect);
#         elif(e.getEventType() == MOUSE_DRAGGED):
#             x = min(e.getX(), startX);
#             y = min(e.getY(), startY);
#             width = abs(e.getX() - startX);
#             height = abs(e.getY() - startY);
#             rect.setBounds(x, y, width, height);

# Attributes: # gwindow [GWindow]: GWindow in which MouseEvent occurred. # x [float]: The x-coordinate at which the event occurred. # y [float]: The y-coordinate at which the event occurred.

# Notes: # The x- and y-coordinates are given relative to the window origin at # the upper left corner of the window.

window

x

y

class campy.gui.events.mouse.MouseEventType

Bases: enum.Enum

MOUSE_CLICKED = 1

MOUSE_DRAGGED = 4

MOUSE_MOVED = 3

MOUSE_RELEASED = 2

campy.gui.events.mouse.onmouseclicked(function)

Usage:

%gui tk
from campy.gui.events.mouse import *
from campy.graphics.gobjects import *
from campy.graphics.gwindow import *

window = GWindow()

@onmouseclicked
def add_circle(event):
    event.window.add(GOval(100, 100, x=event.x - 50, y=event.y - 50))

campy.gui.events.mouse.onmousedragged(function)

Usage:

%gui tk
from campy.gui.events.mouse import *
from campy.graphics.gobjects import *
from campy.graphics.gwindow import *

window = GWindow()

@onmousedragged
def add_circle(event):
    event.window.add(GOval(100, 100, x=event.x - 50, y=event.y - 50))

campy.gui.events.mouse.onmousemoved(function)

Usage:

%gui tk
from campy.gui.events.mouse import *
from campy.graphics.gobjects import *
from campy.graphics.gwindow import *

window = GWindow()

@onmousemoved
def add_circle(event):
    event.window.add(GOval(100, 100, x=event.x - 50, y=event.y - 50))

campy.gui.events.mouse.onmousereleased(function)

Usage:

%gui tk
from campy.gui.events.mouse import *
from campy.graphics.gobjects import *
from campy.graphics.gwindow import *

window = GWindow()

@onmousereleased
def add_rect(event):
    event.window.add(GRect(100, 100, x=event.x - 50, y=event.y - 50))