def __init__(self, parent, id=-1, size=wx.DefaultSize):
wx.ScrolledWindow.__init__(self, parent, id, (0, 0), size=size, style=wx.SUNKEN_BORDER)
self.selected_item = None
self.clicked_item = None
self.lines = []
self.flow_items = []
self.maxWidth = 800
self.maxHeight = 600
self.x = self.y = 0
self.curLine = []
self.click_offset = None
self.select_mode = False # True means we are selecting an item to link to
self.SetVirtualSize((self.maxWidth, self.maxHeight))
#self.SetScrollRate(20, 20)
# Initialize the buffer bitmap. No real DC is needed at this point.
self.buffer = wx.EmptyBitmap(self.maxWidth, self.maxHeight)
self.UpdateDrawing()
self.capturing_mouse = False
self.edit_frame = RichTextFrame(self)
self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftButtonEvent)
self.Bind(wx.EVT_RIGHT_UP, self.OnRightButtonEvent)
self.Bind(wx.EVT_LEFT_UP, self.OnLeftButtonEvent)
self.Bind(wx.EVT_MOTION, self.OnLeftButtonEvent)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
self.Bind(EVT_UPD_FLOW_ITEM, self.OnUpdateFlowItem)
self.Bind(EVT_ADD_FLOW_ITEM, self.OnAddFlowItem)
self.Bind(EVT_SELECT_FLOW_ITEM, self.OnSelectFlowItem)
self.Bind(EVT_SWITCH_FLOW_ITEM, self.OnSwitchFlowItem)
self.Bind(wx.EVT_KEY_DOWN, self.onKeyDown)
if hasattr(self, 'StopAutoScrolling'):
print "stopping auto scroll"
self.StopAutoScrolling()
class MyCanvas(wx.ScrolledWindow):
def __init__(self, parent, id=-1, size=wx.DefaultSize):
wx.ScrolledWindow.__init__(self, parent, id, (0, 0), size=size, style=wx.SUNKEN_BORDER)
self.selected_item = None
self.clicked_item = None
self.lines = []
self.flow_items = []
self.maxWidth = 800
self.maxHeight = 600
self.x = self.y = 0
self.curLine = []
self.click_offset = None
self.select_mode = False # True means we are selecting an item to link to
self.SetVirtualSize((self.maxWidth, self.maxHeight))
#self.SetScrollRate(20, 20)
# Initialize the buffer bitmap. No real DC is needed at this point.
self.buffer = wx.EmptyBitmap(self.maxWidth, self.maxHeight)
self.UpdateDrawing()
self.capturing_mouse = False
self.edit_frame = RichTextFrame(self)
self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftButtonEvent)
self.Bind(wx.EVT_RIGHT_UP, self.OnRightButtonEvent)
self.Bind(wx.EVT_LEFT_UP, self.OnLeftButtonEvent)
self.Bind(wx.EVT_MOTION, self.OnLeftButtonEvent)
self.Bind(wx.EVT_PAINT, self.OnPaint)
self.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
self.Bind(EVT_UPD_FLOW_ITEM, self.OnUpdateFlowItem)
self.Bind(EVT_ADD_FLOW_ITEM, self.OnAddFlowItem)
self.Bind(EVT_SELECT_FLOW_ITEM, self.OnSelectFlowItem)
self.Bind(EVT_SWITCH_FLOW_ITEM, self.OnSwitchFlowItem)
self.Bind(wx.EVT_KEY_DOWN, self.onKeyDown)
if hasattr(self, 'StopAutoScrolling'):
print "stopping auto scroll"
self.StopAutoScrolling()
def onKeyDown(self, event):
if event.GetKeyCode() == wx.WXK_DELETE and self.selected_item:
self.flow_items.remove(self.selected_item)
for item in self.flow_items:
if self.selected_item in item.linked_items:
item.linked_items.remove(self.selected_item)
self.selected_item = None
if event.GetKeyCode() == wx.WXK_SPACE and self.selected_item:
self.selected_item.linked_items = []
for item in self.flow_items:
if self.selected_item in item.linked_items:
item.linked_items.remove(self.selected_item)
self.UpdateDrawing()
event.Skip()
def getWidth(self):
return self.maxWidth
def getHeight(self):
return self.maxHeight
def OnPaint(self, event):
dc = wx.BufferedPaintDC(self, self.buffer, wx.BUFFER_VIRTUAL_AREA)
# the bitmap is copied to the screen when the object goes out of scope
del dc
def Draw(self, dc):
dc.SetBackground(wx.Brush("LIGHT GREY"))
dc.Clear()
dc.BeginDrawing()
# Arrows over items, items over lines
self.DrawFlowLinkLines(dc)
self.DrawFlowItems(dc)
self.DrawFlowLinkArrows(dc)
dc.EndDrawing()
def UpdateDrawing(self):
dc = wx.BufferedDC(None, self.buffer)
self.Draw(dc)
self.Refresh(eraseBackground=False)
self.Update()
def determine_link_points(self, source_item, target_item):
"""
:param source_item: Item linking from
:param targe_item: Item linking from
:return: (start pos, end Pos)
"""
delta_x = target_item.center.x - source_item.center.x
delta_y = target_item.center.y - source_item.center.y
source_offset = wx.Point(0, 0)
target_offset = wx.Point(0, 0)
if abs(delta_x) >= abs(delta_y):
source_offset.x = source_item.size.x if delta_x > 0 else 0
source_offset.y = source_item.size.y / 2
target_offset.x = 0 if delta_x > 0 else source_item.size.x
target_offset.y = source_item.size.y / 2
elif abs(delta_y) >= abs(delta_x):
source_offset.x = source_item.size.x / 2
source_offset.y = source_item.size.y if delta_y > 0 else 0
target_offset.x = source_item.size.x / 2
target_offset.y = 0 if delta_y > 0 else source_item.size.y
return source_item.pos + source_offset, target_item.pos + target_offset
def DrawItem(self, item, dc):
#if item == self.selected_item:
# dc.SetPen(wx.Pen("BLACK", 2))
dc.SetPen(wx.Pen("WHITE", 0))
if item == self.selected_item:
dc.SetBrush(wx.Brush(wx.Colour(204, 255, 229)))
else:
dc.SetBrush(wx.Brush("WHITE"))
dc.DrawRectangle(item.pos.x, item.pos.y, item.size.x, item.size.y)
dc.SetPen(wx.Pen("WHITE", 0))
# Draw the label box
dc.SetBrush(wx.Brush(wx.Colour(49, 58, 117)))
dc.DrawRectangle(item.pos.x, item.pos.y, item.size.x, 20)
# Print the title
font = wx.Font(10, wx.MODERN, wx.NORMAL, wx.BOLD)
dc.SetFont(font)
dc.SetTextForeground(wx.WHITE)
dc.DrawText(item.title, item.pos.x + 4, item.pos.y + 2)
# Draw the context text
font = wx.Font(8, wx.MODERN, wx.NORMAL, wx.BOLD)
dc.SetFont(font)
dc.SetTextForeground(wx.BLUE)
if item.text_content:
y = 20
for line in item.text_content.split('\n'):
line = line.strip(' ')
if not line:
continue
text = line[:16]
if len(line) > 18:
text = text[:13] + "..."
dc.DrawText(text, item.pos.x + 4, item.pos.y + y)
y += 10
def DrawFlowItems(self, dc):
for item in self.flow_items:
self.DrawItem(item, dc)
def DrawFlowLinkLines(self, dc):
dc.SetPen(wx.Pen('MEDIUM FOREST GREEN', 2))
dc.SetBrush(wx.Brush(wx.NamedColour('MEDIUM FOREST GREEN'), wx.SOLID))
for item in self.flow_items:
# Draw the link lines
for linked_item in item.linked_items:
source_pos, target_pos = self.determine_link_points(item, linked_item)
dc.DrawLine(source_pos.x, source_pos.y, target_pos.x, target_pos.y)
def DrawFlowLinkArrows(self, dc):
dc.SetPen(wx.Pen('MEDIUM FOREST GREEN', 1))
dc.SetBrush(wx.Brush(wx.NamedColour('GREEN'), wx.SOLID))
for item in self.flow_items:
for linked_item in item.linked_items:
source_pos, target_pos = self.determine_link_points(item, linked_item)
# Draw the arrow
ARROW_SIZE = 12
ARROW_IN_SIZE = 6
angle = atan2(target_pos.y - source_pos.y, target_pos.x - source_pos.x)
pol_points = [
(target_pos.x - ARROW_IN_SIZE * cos(angle), target_pos.y - ARROW_IN_SIZE * sin(angle)),
(target_pos.x - ARROW_SIZE * cos(angle - pi / 6), target_pos.y - ARROW_SIZE * sin(angle - pi / 4)),
(target_pos.x, target_pos.y),
(target_pos.x - ARROW_SIZE * cos(angle + pi / 6), target_pos.y - ARROW_SIZE * sin(angle + pi / 4)),
]
dc.DrawPolygon(pol_points)
def SetXY(self, event):
self.x, self.y = self.ConvertEventCoords(event)
def ConvertEventCoords(self, event):
x, y = self.CalcUnscrolledPosition(event.GetX(), event.GetY())
return wx.Point(x, y)
def OnLeftButtonEvent(self, event):
event_pos = wx.Point(event.GetX(), event.GetY())
# Not available on wxPython2.8
# if self.IsAutoScrolling():
# self.StopAutoScrolling()
if event.LeftDown():
self.SetFocus()
self.clicked_item = clicked_item = self.item_at_pos(self.ConvertEventCoords(event))
if self.select_mode:
self.select_mode = False
if self.clicked_item:
self.edit_frame.create_link_to(self.clicked_item)
if self.clicked_item not in self.selected_item.linked_items:
self.selected_item.linked_items.append(self.clicked_item)
self.edit_frame.Show()
return event.Skip()
if clicked_item:
self.selected_item = clicked_item
self.edit_frame.update(self.selected_item.title, self.selected_item.content)
self.capturing_mouse = True
#self.CaptureMouse()
self.selected_item = clicked_item
self.UpdateDrawing() # Need to update the selected item color
self.click_offset = wx.Point(event_pos.x - clicked_item.pos.x, event_pos.y - clicked_item.pos.y)
elif event.Dragging() and self.clicked_item:
new_pos = event_pos - self.click_offset
# Limit movement to the canvas boundaries
new_pos.x = max(new_pos.x, 0)
new_pos.y = max(new_pos.y, 0)
new_pos.x = min(new_pos.x, self.maxWidth - self.clicked_item.size.x - 1)
new_pos.y = min(new_pos.y, self.maxHeight - self.clicked_item.size.y - 1)
self.clicked_item.pos = new_pos
self.UpdateDrawing()
elif event.LeftUp():
if self.capturing_mouse:
#self.ReleaseMouse()
self.capturing_mouse = False
self.clicked_item = None
def OnRightButtonEvent(self, event):
clicked_item = self.item_at_pos(self.ConvertEventCoords(event))
if self.selected_item and clicked_item and clicked_item != self.selected_item:
if clicked_item not in self.selected_item.linked_items:
self.selected_item.linked_items.append(clicked_item)
self.UpdateDrawing()
event.Skip()
def get_next_item_position(self):
"""
Free position to place the next item
:return:
"""
lookup_locations = [wx.Point(300, 150)]
selected_item = self.selected_item
if selected_item:
radius = wx.Point(selected_item.size.x, selected_item.size.y) + wx.Point(30, 30)
potential_pos = ((radius.x, 0), (0, radius.y), (-radius.x, 0), (0, -radius.y))
for x, y in potential_pos:
lookup_locations.append(wx.Point(selected_item.pos.x + x, selected_item.pos.y + y))
for pos in lookup_locations:
if self.item_at_pos(pos) is None:
return pos
def item_at_pos(self, check_pos):
for item in self.flow_items:
x_delta = check_pos.x - item.pos.x
y_delta = check_pos.y - item.pos.y
if 0 <= x_delta < item.size.x and 0 <= y_delta < item.size.y:
return item
def add_flow_item(self):
#self.edit_frame.Show()
pos = self.get_next_item_position()
size = wx.Size(120, 110)
item = FlowItem(pos, size)
self.flow_items.append(item)
#if self.selected_item: # Link from selected item
# self.selected_item.linked_items.append(item)
self.selected_item = item
self.UpdateDrawing()
self.x, self.y = pos
return item
def OnDoubleClick(self, event):
if self.selected_item:
self.edit_frame.update(self.selected_item.title, self.selected_item.content)
self.edit_frame.Show()
def OnAddFlowItem(self, event):
self.add_flow_item(event.title, event.content)
def OnUpdateFlowItem(self, event):
if self.selected_item:
self.selected_item.title = event.title
self.selected_item.content = event.content
self.selected_item.text_content = rtc2txt(event.content)
self.UpdateDrawing()
self.Refresh()
def OnSelectFlowItem(self, event):
self.select_mode = True
def OnSwitchFlowItem(self, event):
switch_to_item_id = event.item_id
for item in self.flow_items:
print switch_to_item_id, item.id
if switch_to_item_id == item.id:
print "switching to", self.selected_item
self.selected_item = item
self.UpdateDrawing()
self.OnDoubleClick(event)