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https://github.com/RTimothyEdwards/netgen.git
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First pass at incorporating the efabless LVS manager GUI into the
netgen distribution. It sort of works, but not quite there yet.
This commit is contained in:
Tim Edwards
Executable
+158
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#!/bin/env python3
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'''Michael Lange <klappnase (at) freakmail (dot) de>
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The ToolTip class provides a flexible tooltip widget for tkinter; it is based on IDLE's ToolTip
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module which unfortunately seems to be broken (at least the version I saw).
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INITIALIZATION OPTIONS:
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anchor : where the text should be positioned inside the widget, must be on of "n", "s", "e", "w", "nw" and so on;
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default is "center"
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bd : borderwidth of the widget; default is 1 (NOTE: don't use "borderwidth" here)
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bg : background color to use for the widget; default is "lightyellow" (NOTE: don't use "background")
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delay : time in ms that it takes for the widget to appear on the screen when the mouse pointer has
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entered the parent widget; default is 1500
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fg : foreground (i.e. text) color to use; default is "black" (NOTE: don't use "foreground")
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follow_mouse : if set to 1 the tooltip will follow the mouse pointer instead of being displayed
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outside of the parent widget; this may be useful if you want to use tooltips for
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large widgets like listboxes or canvases; default is 0
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font : font to use for the widget; default is system specific
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justify : how multiple lines of text will be aligned, must be "left", "right" or "center"; default is "left"
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padx : extra space added to the left and right within the widget; default is 4
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pady : extra space above and below the text; default is 2
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relief : one of "flat", "ridge", "groove", "raised", "sunken" or "solid"; default is "solid"
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state : must be "normal" or "disabled"; if set to "disabled" the tooltip will not appear; default is "normal"
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text : the text that is displayed inside the widget
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textvariable : if set to an instance of tkinter.StringVar() the variable's value will be used as text for the widget
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width : width of the widget; the default is 0, which means that "wraplength" will be used to limit the widgets width
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wraplength : limits the number of characters in each line; default is 150
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WIDGET METHODS:
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configure(**opts) : change one or more of the widget's options as described above; the changes will take effect the
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next time the tooltip shows up; NOTE: follow_mouse cannot be changed after widget initialization
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Other widget methods that might be useful if you want to subclass ToolTip:
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enter() : callback when the mouse pointer enters the parent widget
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leave() : called when the mouse pointer leaves the parent widget
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motion() : is called when the mouse pointer moves inside the parent widget if follow_mouse is set to 1 and the
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tooltip has shown up to continually update the coordinates of the tooltip window
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coords() : calculates the screen coordinates of the tooltip window
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create_contents() : creates the contents of the tooltip window (by default a tkinter.Label)
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'''
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# Ideas gleaned from PySol
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import tkinter
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class ToolTip:
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def __init__(self, master, text='Your text here', delay=1500, **opts):
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self.master = master
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self._opts = {'anchor':'center', 'bd':1, 'bg':'lightyellow', 'delay':delay, 'fg':'black',\
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'follow_mouse':0, 'font':None, 'justify':'left', 'padx':4, 'pady':2,\
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'relief':'solid', 'state':'normal', 'text':text, 'textvariable':None,\
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'width':0, 'wraplength':150}
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self.configure(**opts)
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self._tipwindow = None
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self._id = None
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self._id1 = self.master.bind("<Enter>", self.enter, '+')
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self._id2 = self.master.bind("<Leave>", self.leave, '+')
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self._id3 = self.master.bind("<ButtonPress>", self.leave, '+')
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self._follow_mouse = 0
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if self._opts['follow_mouse']:
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self._id4 = self.master.bind("<Motion>", self.motion, '+')
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self._follow_mouse = 1
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def configure(self, **opts):
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for key in opts:
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if key in self._opts:
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self._opts[key] = opts[key]
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else:
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KeyError = 'KeyError: Unknown option: "%s"' %key
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raise KeyError
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##----these methods handle the callbacks on "<Enter>", "<Leave>" and "<Motion>"---------------##
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##----events on the parent widget; override them if you want to change the widget's behavior--##
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def enter(self, event=None):
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self._schedule()
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def leave(self, event=None):
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self._unschedule()
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self._hide()
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def motion(self, event=None):
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if self._tipwindow and self._follow_mouse:
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x, y = self.coords()
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self._tipwindow.wm_geometry("+%d+%d" % (x, y))
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##------the methods that do the work:---------------------------------------------------------##
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def _schedule(self):
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self._unschedule()
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if self._opts['state'] == 'disabled':
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return
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self._id = self.master.after(self._opts['delay'], self._show)
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def _unschedule(self):
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id = self._id
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self._id = None
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if id:
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self.master.after_cancel(id)
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def _show(self):
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if self._opts['state'] == 'disabled':
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self._unschedule()
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return
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if not self._tipwindow:
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self._tipwindow = tw = tkinter.Toplevel(self.master)
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# hide the window until we know the geometry
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tw.withdraw()
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tw.wm_overrideredirect(1)
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if tw.tk.call("tk", "windowingsystem") == 'aqua':
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tw.tk.call("::tk::unsupported::MacWindowStyle", "style", tw._w, "help", "none")
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self.create_contents()
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tw.update_idletasks()
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x, y = self.coords()
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tw.wm_geometry("+%d+%d" % (x, y))
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tw.deiconify()
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tw.lift()
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def _hide(self):
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tw = self._tipwindow
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self._tipwindow = None
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if tw:
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tw.destroy()
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##----these methods might be overridden in derived classes:----------------------------------##
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def coords(self):
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# The tip window must be completely outside the master widget;
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# otherwise when the mouse enters the tip window we get
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# a leave event and it disappears, and then we get an enter
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# event and it reappears, and so on forever :-(
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# or we take care that the mouse pointer is always outside the tipwindow :-)
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tw = self._tipwindow
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twx, twy = tw.winfo_reqwidth(), tw.winfo_reqheight()
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w, h = tw.winfo_screenwidth(), tw.winfo_screenheight()
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# calculate the y coordinate:
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if self._follow_mouse:
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y = tw.winfo_pointery() + 20
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# make sure the tipwindow is never outside the screen:
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if y + twy > h:
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y = y - twy - 30
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else:
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y = self.master.winfo_rooty() + self.master.winfo_height() + 3
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if y + twy > h:
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y = self.master.winfo_rooty() - twy - 3
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# we can use the same x coord in both cases:
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x = tw.winfo_pointerx() - twx / 2
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if x < 0:
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x = 0
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elif x + twx > w:
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x = w - twx
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return x, y
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def create_contents(self):
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opts = self._opts.copy()
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for opt in ('delay', 'follow_mouse', 'state'):
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del opts[opt]
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label = tkinter.Label(self._tipwindow, **opts)
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label.pack()
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