add hg and python

1 files changed, 55 insertions, 0 deletions

diff --git a/sys/src/cmd/python/Demo/tkinter/matt/canvas-moving-w-mouse.py b/sys/src/cmd/python/Demo/tkinter/matt/canvas-moving-w-mouse.py
new file mode 100644
index 000000000..81785d86a
--- /dev/null
+++ b/sys/src/cmd/python/Demo/tkinter/matt/canvas-moving-w-mouse.py
@@ -0,0 +1,55 @@
+from Tkinter import *
+
+# this file demonstrates the movement of a single canvas item under mouse control
+
+class Test(Frame):
+    ###################################################################
+    ###### Event callbacks for THE CANVAS (not the stuff drawn on it)
+    ###################################################################
+    def mouseDown(self, event):
+        # remember where the mouse went down
+        self.lastx = event.x
+        self.lasty = event.y
+
+    def mouseMove(self, event):
+        # whatever the mouse is over gets tagged as CURRENT for free by tk.
+        self.draw.move(CURRENT, event.x - self.lastx, event.y - self.lasty)
+        self.lastx = event.x
+        self.lasty = event.y
+
+    ###################################################################
+    ###### Event callbacks for canvas ITEMS (stuff drawn on the canvas)
+    ###################################################################
+    def mouseEnter(self, event):
+        # the CURRENT tag is applied to the object the cursor is over.
+        # this happens automatically.
+        self.draw.itemconfig(CURRENT, fill="red")
+
+    def mouseLeave(self, event):
+        # the CURRENT tag is applied to the object the cursor is over.
+        # this happens automatically.
+        self.draw.itemconfig(CURRENT, fill="blue")
+
+    def createWidgets(self):
+        self.QUIT = Button(self, text='QUIT', foreground='red',
+                           command=self.quit)
+        self.QUIT.pack(side=LEFT, fill=BOTH)
+        self.draw = Canvas(self, width="5i", height="5i")
+        self.draw.pack(side=LEFT)
+
+        fred = self.draw.create_oval(0, 0, 20, 20,
+                                     fill="green", tags="selected")
+
+        self.draw.tag_bind(fred, "<Any-Enter>", self.mouseEnter)
+        self.draw.tag_bind(fred, "<Any-Leave>", self.mouseLeave)
+
+        Widget.bind(self.draw, "<1>", self.mouseDown)
+        Widget.bind(self.draw, "<B1-Motion>", self.mouseMove)
+
+    def __init__(self, master=None):
+        Frame.__init__(self, master)
+        Pack.config(self)
+        self.createWidgets()
+
+test = Test()
+test.mainloop()