wxPython の例から DragImage デモを変更して、画像を移動するだけでなく、画像をドラッグするとドラッグ可能な新しいコピーが生成され、元の「ソース」画像が残るようにしようとしています。元の画像は、選択できる一連のウィジェットのようなものです。これらのいずれかをクリックしてドラッグすると、ソースウィジェットが残っている間にどこにでも配置できるウィジェットが生成されます (これは複数回実行できます)。
import os
import glob
import wx
import wx.lib.scrolledpanel as scrolled
class MainWindow(wx.Frame):
def __init__(self, parent, title):
wx.Frame.__init__(self, parent)
frm_pnl = MainPanel(self)
self.Show()
class DragShape:
def __init__(self, bmp):
self.bmp = bmp
self.pos = (0,0)
self.shown = True
self.text = None
self.fullscreen = False
def HitTest(self, pt):
rect = self.GetRect()
return rect.InsideXY(pt.x, pt.y)
def GetRect(self):
#return wx.Rect(self.pos[0], self.pos[1], self.bmp.GetWidth(), self.bmp.GetHeight())
return wx.Rect(self.pos[0], self.pos[1], self.bmp.GetWidth()/2, self.bmp.GetHeight()/2)
def Draw(self, dc, op = wx.COPY):
if self.bmp.Ok():
memDC = wx.MemoryDC()
memDC.SelectObject(self.bmp)
#dc.Blit(self.pos[0], self.pos[1],
# self.bmp.GetWidth(), self.bmp.GetHeight(),
# memDC, 0, 0, op, True)
dc.Blit(self.pos[0], self.pos[1],
self.bmp.GetWidth()/2, self.bmp.GetHeight()/2,
memDC, 0, 0, op, True)
return True
else:
return False
class MainPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent, -1, size = (900, 700))
self.shapes = []
#panel for mechanisms
mechPnl = MechanismPanel(self)
mechSzr = wx.BoxSizer(wx.HORIZONTAL)
mechSzr.Add(mechPnl, 1)
selfSizer = wx.BoxSizer(wx.VERTICAL)
selfSizer.Add(mechSzr, 0, wx.EXPAND)
selfSizer.Layout()
self.SetSizer(selfSizer)
self.dragImage = None
self.dragShape = None
self.hiliteShape = None
self.SetCursor(wx.StockCursor(wx.CURSOR_ARROW))
#self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
self.Bind(wx.EVT_PAINT, self.OnPaint)
mechPnl.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
mechPnl.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
mechPnl.Bind(wx.EVT_MOTION, self.OnMotion)
mechPnl.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveWindow)
# The mouse is moving
def OnMotion(self, evt):
print "On motion!"
# Ignore mouse movement if we're not dragging.
if not self.dragShape or not evt.Dragging() or not evt.LeftIsDown():
return
# if we have a shape, but haven't started dragging yet
if self.dragShape and not self.dragImage:
# only start the drag after having moved a couple pixels
tolerance = 2
pt = evt.GetPosition()
dx = abs(pt.x - self.dragStartPos.x)
dy = abs(pt.y - self.dragStartPos.y)
if dx <= tolerance and dy <= tolerance:
return
# refresh the area of the window where the shape was so it
# will get erased.
self.dragShape.shown = False
self.RefreshRect(self.dragShape.GetRect(), True)
self.Update()
if self.dragShape.text:
self.dragImage = wx.DragString(self.dragShape.text,
wx.StockCursor(wx.CURSOR_HAND))
else:
self.dragImage = wx.DragImage(self.dragShape.bmp,
wx.StockCursor(wx.CURSOR_HAND))
hotspot = self.dragStartPos - self.dragShape.pos
self.dragImage.BeginDrag(hotspot, self, self.dragShape.fullscreen)
self.dragImage.Move(pt)
self.dragImage.Show()
# if we have shape and image then move it, posibly highlighting another shape.
elif self.dragShape and self.dragImage:
onShape = self.FindShape(evt.GetPosition())
unhiliteOld = False
hiliteNew = False
# figure out what to hilite and what to unhilite
if self.hiliteShape:
if onShape is None or self.hiliteShape is not onShape:
unhiliteOld = True
if onShape and onShape is not self.hiliteShape and onShape.shown:
hiliteNew = True
# if needed, hide the drag image so we can update the window
if unhiliteOld or hiliteNew:
self.dragImage.Hide()
if unhiliteOld:
dc = wx.ClientDC(self)
self.hiliteShape.Draw(dc)
self.hiliteShape = None
if hiliteNew:
dc = wx.ClientDC(self)
self.hiliteShape = onShape
self.hiliteShape.Draw(dc, wx.INVERT)
# now move it and show it again if needed
self.dragImage.Move(evt.GetPosition())
if unhiliteOld or hiliteNew:
self.dragImage.Show()
# Left mouse button up.
def OnLeftUp(self, evt):
print "On left up!"
if not self.dragImage or not self.dragShape:
self.dragImage = None
self.dragShape = None
return
# Hide the image, end dragging, and nuke out the drag image.
self.dragImage.Hide()
self.dragImage.EndDrag()
self.dragImage = None
if self.hiliteShape:
self.RefreshRect(self.hiliteShape.GetRect())
self.hiliteShape = None
# reposition and draw the shape
# Note by jmg 11/28/03
# Here's the original:
#
# self.dragShape.pos = self.dragShape.pos + evt.GetPosition() - self.dragStartPos
#
# So if there are any problems associated with this, use that as
# a starting place in your investigation. I've tried to simulate the
# wx.Point __add__ method here -- it won't work for tuples as we
# have now from the various methods
#
# There must be a better way to do this :-)
#
self.dragShape.pos = (
self.dragShape.pos[0] + evt.GetPosition()[0] - self.dragStartPos[0],
self.dragShape.pos[1] + evt.GetPosition()[1] - self.dragStartPos[1]
)
self.dragShape.shown = True
self.RefreshRect(self.dragShape.GetRect())
self.dragShape = None
# Fired whenever a paint event occurs
def OnPaint(self, evt):
print "On paint!"
dc = wx.PaintDC(self)
self.PrepareDC(dc)
self.DrawShapes(dc)
# Left mouse button is down.
def OnLeftDown(self, evt):
print "On left down!"
# Did the mouse go down on one of our shapes?
shape = self.FindShape(evt.GetPosition())
# If a shape was 'hit', then set that as the shape we're going to
# drag around. Get our start position. Dragging has not yet started.
# That will happen once the mouse moves, OR the mouse is released.
if shape:
self.dragShape = shape
self.dragStartPos = evt.GetPosition()
# Go through our list of shapes and draw them in whatever place they are.
def DrawShapes(self, dc):
for shape in self.shapes:
if shape.shown:
shape.Draw(dc)
# This is actually a sophisticated 'hit test', but in this
# case we're also determining which shape, if any, was 'hit'.
def FindShape(self, pt):
for shape in self.shapes:
if shape.HitTest(pt):
return shape
return None
# Clears the background, then redraws it. If the DC is passed, then
# we only do so in the area so designated. Otherwise, it's the whole thing.
def OnEraseBackground(self, evt):
dc = evt.GetDC()
if not dc:
dc = wx.ClientDC(self)
rect = self.GetUpdateRegion().GetBox()
dc.SetClippingRect(rect)
self.TileBackground(dc)
# tile the background bitmap
def TileBackground(self, dc):
sz = self.GetClientSize()
w = self.bg_bmp.GetWidth()
h = self.bg_bmp.GetHeight()
x = 0
while x < sz.width:
y = 0
while y < sz.height:
dc.DrawBitmap(self.bg_bmp, x, y)
y = y + h
x = x + w
# We're not doing anything here, but you might have reason to.
# for example, if you were dragging something, you might elect to
# 'drop it' when the cursor left the window.
def OnLeaveWindow(self, evt):
pass
class MechanismPanel(scrolled.ScrolledPanel):
def __init__(self, parent):
scrolled.ScrolledPanel.__init__(self, parent, -1, size = (400, 140))
self.SetBackgroundColour((211, 211, 211))
mechPnlSzr = wx.BoxSizer(wx.HORIZONTAL)
os.chdir("./figures")
position = 50
for file in glob.glob("icon*.png"):
print file
imgIcon = wx.Image(file, wx.BITMAP_TYPE_PNG).ConvertToBitmap()
staticBitmap = wx.StaticBitmap(self, -1, imgIcon, (position, 50), (50, 50))
shape = DragShape(staticBitmap.GetBitmap())
shape.pos = (position, 50)
position = position + 100
shape.fullscreen = True
parent.shapes.append(shape)
mechPnlSzr.Add(staticBitmap, 0, wx.FIXED, border = 20)
self.SetSizer(mechPnlSzr)
self.SetAutoLayout(1)
self.SetupScrolling()#scroll_y = False)
app = wx.App(False)
frame = MainWindow(None, "Trading Client")
app.MainLoop()