add hg and python

1 files changed, 78 insertions, 0 deletions

diff --git a/sys/src/cmd/python/Demo/tkinter/matt/canvas-mult-item-sel.py b/sys/src/cmd/python/Demo/tkinter/matt/canvas-mult-item-sel.py
new file mode 100644
index 000000000..a4f267cc1
--- /dev/null
+++ b/sys/src/cmd/python/Demo/tkinter/matt/canvas-mult-item-sel.py
@@ -0,0 +1,78 @@
+from Tkinter import *
+
+# allows moving dots with multiple selection.
+
+SELECTED_COLOR = "red"
+UNSELECTED_COLOR = "blue"
+
+class Test(Frame):
+    ###################################################################
+    ###### Event callbacks for THE CANVAS (not the stuff drawn on it)
+    ###################################################################
+    def mouseDown(self, event):
+        # see if we're inside a dot. If we are, it
+        # gets tagged as CURRENT for free by tk.
+
+        if not event.widget.find_withtag(CURRENT):
+            # we clicked outside of all dots on the canvas. unselect all.
+
+            # re-color everything back to an unselected color
+            self.draw.itemconfig("selected", fill=UNSELECTED_COLOR)
+            # unselect everything
+            self.draw.dtag("selected")
+        else:
+            # mark as "selected" the thing the cursor is under
+            self.draw.addtag("selected", "withtag", CURRENT)
+            # color it as selected
+            self.draw.itemconfig("selected", fill=SELECTED_COLOR)
+
+        self.lastx = event.x
+        self.lasty = event.y
+
+
+    def mouseMove(self, event):
+        self.draw.move("selected", event.x - self.lastx, event.y - self.lasty)
+        self.lastx = event.x
+        self.lasty = event.y
+
+    def makeNewDot(self):
+        # create a dot, and mark it as current
+        fred = self.draw.create_oval(0, 0, 20, 20,
+                                     fill=SELECTED_COLOR, tags=CURRENT)
+        # and make it selected
+        self.draw.addtag("selected", "withtag", CURRENT)
+
+    def createWidgets(self):
+        self.QUIT = Button(self, text='QUIT', foreground='red',
+                           command=self.quit)
+
+        ################
+        # make the canvas and bind some behavior to it
+        ################
+        self.draw = Canvas(self, width="5i", height="5i")
+        Widget.bind(self.draw, "<1>", self.mouseDown)
+        Widget.bind(self.draw, "<B1-Motion>", self.mouseMove)
+
+        # and other things.....
+        self.button = Button(self, text="make a new dot", foreground="blue",
+                             command=self.makeNewDot)
+
+        message = ("%s dots are selected and can be dragged.\n"
+                   "%s are not selected.\n"
+                   "Click in a dot to select it.\n"
+                   "Click on empty space to deselect all dots."
+                   ) % (SELECTED_COLOR, UNSELECTED_COLOR)
+        self.label = Message(self, width="5i", text=message)
+
+        self.QUIT.pack(side=BOTTOM, fill=BOTH)
+        self.label.pack(side=BOTTOM, fill=X, expand=1)
+        self.button.pack(side=BOTTOM, fill=X)
+        self.draw.pack(side=LEFT)
+
+    def __init__(self, master=None):
+        Frame.__init__(self, master)
+        Pack.config(self)
+        self.createWidgets()
+
+test = Test()
+test.mainloop()