def _on_release(self, event):
'''
This handles when the mouse left-button has been released, which adds
a new bounding box or resizes an existing box.
Parameters
----------
event : tkinter Event
Event that handles the mouse being clicked, creating the first of
two bounding box corners
Attributes
----------
None
Raises
------
None
Returns
-------
complete : bool
Returns True for unittesting
'''
if self.box_resize_mode == 'NEW':
top = min(self.clicked[1], event.y)
bottom = max(self.clicked[1], event.y)
left = min(self.clicked[0], event.x)
right = max(self.clicked[0], event.x)
label = self.class_list.index(self.selected_class.get())
color = self.colorspace[label]
box = InteractiveBox(self, left, top, right, bottom, color)
self.canvas.delete(self.rect)
del self.rect
box.draw_box(len(self.annotations[self.current_file].roi))
top = self.aspect_ratio * top
bottom = self.aspect_ratio * bottom
left = self.aspect_ratio * left
right = self.aspect_ratio * right
roi = ROI()
roi.push(left, top)
roi.push(right, bottom)
self.annotations[self.current_file].push(roi,label)
self.class_count[label] = self.class_count[label] + 1
self.draw_canvas()
self.saved = False
self.box_resize_mode = 'NEW'
return True
def test_draw_box(self):
tool = AnnotationTool()
tool.load_app(True)
# Annotation added
tool.annotations = []
tool.file_list = []
tool.class_list = ['winston', 'prince', 'duckie']
tool.colorspace = ['#0000FF', '#FF0000', '#00FF00']
tool.current_file = 0
tool.class_count = [5, 5, 5]
for i in range(5):
a = Annotation()
a.rotation = 3
tool.file_list.append('file%d.jpg' % i)
for p in range(3):
roi = ROI()
roi.push(0, 0)
roi.push(100.0, 100.0)
a.push(roi, p % len(tool.class_list))
tool.annotations.append(a)
tool.top_colors_free = ['#00FFFF', '#FF00FF', '#FFFF00']
tool.top_colors_used = ['#0000FF', '#FF0000', '#00FF00']
tool.img = MockImg()
tool._draw_workspace()
canvas_children = tool.canvas.winfo_children()
ibox = InteractiveBox(tool, 10, 10, 200, 200, tool.colorspace[0])
self.assertEqual(len(canvas_children), 3)
ibox.draw_box(0)
canvas_children = tool.canvas.winfo_children()
self.assertTrue(hasattr(ibox, 'rect'))
self.assertTrue(hasattr(ibox, 'close_button'))
self.assertEqual(len(canvas_children), 4)
def draw_canvas(self):
'''
This draws the canvas in the main window.
Parameters
----------
None
Attributes
----------
canvas : tkinter Canvas object
This is what the image is drawn on
aspect_ratio : float
Compute the scale factor to shrink/increase the image to fit in
the canvas
boxes : list
A list for the OpenAnnotation InteractiveBox objects
Raises
------
None
Returns
-------
complete : bool
Returns True for unittesting
'''
# Draw Canvas on Right
canvas_frame = Frame(self.background, bg='green',
width=self.canvas_width,
height=self.canvas_height)
canvas_frame.place(x=0,
y=self.toolbar_height,
width = self.canvas_width,
height = self.canvas_height,
)
self.canvas = Canvas(canvas_frame,
width=self.canvas_width,
height=self.canvas_height)
self.canvas.place(x=0,
y=0,
width = self.canvas_width,
height = self.canvas_height,
)
if len(self.annotations):
self.aspect_ratio = max(self.img.size[0]/(self.canvas_width),
self.img.size[1]/(self.canvas_height))
new_size = (int(self.img.size[0]/self.aspect_ratio),
int(self.img.size[1]/self.aspect_ratio))
if self.window.winfo_ismapped():
pil_img = ImageTk.PhotoImage(self.img.resize(new_size,
Image.ANTIALIAS))
else:
pil_img = None
self.canvas.image = pil_img
self.canvas.create_image(0, 0, anchor=tk.NW, image=pil_img)
self.boxes = []
for i, roi in enumerate(self.annotations[self.current_file].roi):
left, top, right, bottom = roi.getBox()
lbl = self.annotations[self.current_file].label[i]
left = left / self.aspect_ratio
top = top / self.aspect_ratio
right = right / self.aspect_ratio
bottom = bottom / self.aspect_ratio
color = self.colorspace[lbl]
box = InteractiveBox(self, left, top, right, bottom, color)
box.draw_box(i)
self.boxes.append(box)
# Only allow bounding boxes to be drawn if they can be tied to a class
if len(self.class_list) and len(self.annotations):
self.canvas.bind("<Button-1>",self._on_click)
self.canvas.bind("<ButtonRelease-1>",self._on_release)
self.canvas.bind("<B1-Motion>", self._on_move_press)
return True