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import math
import enamlx
enamlx.install()
from enaml.core.api import Looper
from enamlx.widgets.api import (
GraphicsView, GraphicsItem, GraphicsTextItem, GraphicsRectItem,
GraphicsPolygonItem, GraphicsEllipseItem, GraphicsLineItem,
GraphicsPathItem, GraphicsItemGroup, Pen, Brush, Point
)
from enaml.widgets.api import (
MainWindow, Container, PushButton, CheckBox, RadioButton, SpinBox,
Menu, Action, MenuBar, Feature, ObjectCombo, Form, Label
)
from enaml.drag_drop import DragData, DropAction
from enaml.qt.QtGui import QPainterPath
from enaml.qt.QtCore import Qt
def create_drag_data(data):
drag = DragData()
drag.supported_actions = DropAction.Copy
drag.mime_data.set_data('text/plain', data)
return drag
enamldef Main(MainWindow): window:
attr blue_pen = Pen(color='blue')
attr red_pen = Pen(color='red')
attr green_brush = Brush(color='green')
MenuBar:
Menu:
title = "&File"
Action:
text = "Quit\tCtrl+Q"
triggered :: raise SystemExit(0)
Container:
Form:
Label:
text = "Drag mode:"
ObjectCombo:
items = list(canvas.get_member('drag_mode').items)
selected := canvas.drag_mode
GraphicsView: canvas:
attr size = (960, 960)
background = "#fff"
drag_mode = 'selection'
minimum_size = size
attr last_point = None
Menu:
context_menu = True
Action:
text = 'Reset'
triggered :: canvas.reset_view()
mouse_press_event => (evt):
self.last_point = evt.pos()
mouse_move_event => (evt):
if self.last_point is None:
self.last_point = evt.pos()
if self.selected_items or self.drag_mode == 'selection':
return
dp = evt.pos()-self.last_point
delta = Point(dp.x(), dp.y())
self.last_point = evt.pos()
if evt.buttons() in (Qt.MidButton, Qt.LeftButton):
px = self.pixel_density()
tr = -delta*px
self.translate_view(tr.x, tr.y)
wheel_event => (evt):
if hasattr(evt, 'delta'):
d = evt.delta()
else:
d = evt.angleDelta().y()
s = 1.001 ** d
self.scale_view(s, s)
selected_items ::
old = change['oldvalue']
new = change['value']
for item in old:
item.pen = blue_pen
for item in new:
item.pen = red_pen
Looper:
iterable = range(100)
GraphicsTextItem:
position = (0, loop_index*20)
pen = blue_pen
movable = True
selectable = True
text << "{}".format(position)
features = Feature.DragEnabled
drag_start => ():
return create_drag_data(b"Hello")
drag_end => (drag_data, result):
print(drag_data, result)
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