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path: root/jfr_playoff/gui/frames/__init__.py
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#coding=utf-8

from functools import partial
import types

import tkinter as tk
from tkinter import ttk
import tkMessageBox

def getIntVal(widget, default=0):
    try:
        return int(widget.get().strip())
    except ValueError:
        return default

def setPanelState(frame, state):
    for child in frame.winfo_children():
        if isinstance(child, tk.Frame):
            setPanelState(child, state)
        else:
            child.configure(state=state)

class WidgetRepeater(tk.Frame):
    def __init__(self, master, widgetClass, headers=None, classParams=None,
                 *args, **kwargs):
        widgetList = widgetClass
        if not isinstance(widgetClass, list):
            widgetList = [widgetClass]
        for widget in widgetList:
            if not issubclass(widget, RepeatableFrame):
                raise AttributeError(
                    'WidgetRepeater widget must be a RepeatableFrame')
        tk.Frame.__init__(self, master, **kwargs)
        self.widgetClass = widgetClass
        self.widgetClassParams = classParams
        self.widgets = []
        self.headers = headers
        self.headerFrame = None
        self.addButton = ttk.Button(
            self, text='[+]', width=5, command=self._addWidget)
        self.renderContent()

    def _findWidget(self, row, column):
        for children in self.children.values():
            info = children.grid_info()
            if info['row'] == str(row) and info['column'] == str(column):
                return children
        return None

    def _createWidget(self, widgetClass, widgetClassParams=None):
        removeButton = ttk.Button(
            self, text='[-]', width=5,
            command=lambda i=len(self.widgets): self._removeWidget(i))
        removeButton.grid(row=len(self.widgets), column=0, sticky=tk.N)
        widget = widgetClass(self)
        if widgetClassParams is not None:
            widget.configureContent(**widgetClassParams)
        self.widgets.append(widget)
        self._updateGrid()

    def _handleWidgetSelection(self, selected):
        if selected < len(self.widgetClass):
            params = None
            if isinstance(self.widgetClassParams, list) and \
               selected < len(self.widgetClassParams):
                params = self.widgetClassParams[selected]
            self._createWidget(self.widgetClass[selected], params)

    def _widgetSelectionDialog(self):
        dialog = tk.Toplevel(self)
        dialog.title('Wybór elementu do dodania')
        dialog.geometry('%dx%d' % (300, len(self.widgetClass) * 20 + 30))
        dialog.grab_set()
        dialog.focus_force()
        frame = WidgetSelectionFrame(
            dialog, vertical=True,
            widgets=self.widgetClass, callback=self._handleWidgetSelection)
        frame.pack(side=tk.TOP, fill=tk.BOTH, expand=True)

    def _addWidget(self):
        if isinstance(self.widgetClass, list):
            self._widgetSelectionDialog()
        else:
            self._createWidget(self.widgetClass, self.widgetClassParams)

    def _removeWidget(self, idx):
        self.widgets.pop(idx).destroy()
        self._findWidget(row=len(self.widgets), column=0).destroy()
        self._updateGrid()

    def _updateGrid(self):
        headeridx = int(self.headerFrame is not None)
        for idx, widget in enumerate(self.widgets):
            widget.grid(
                row=idx+headeridx, column=1, sticky=tk.W+tk.E+tk.N+tk.S)
        if self.headerFrame is not None:
            self.headerFrame.grid(row=0, column=1, sticky=tk.W+tk.E+tk.N+tk.S)
        self.addButton.grid(
            row=len(self.widgets), column=0, columnspan=1, sticky=tk.W+tk.N)

    def _renderHeader(self):
        if self.headers:
            self.headerFrame = tk.Frame(self)
            for idx, header in enumerate(self.headers):
                self.headerFrame.columnconfigure(idx, weight=1)
                widget = header[0](self.headerFrame, **header[1])
                widget.grid(row=0, column=idx, sticky=tk.W+tk.E+tk.N)
            (tk.Label(self, text=' ')).grid(
                row=0, column=0, sticky=tk.W+tk.E+tk.N)

    def renderContent(self):
        self.columnconfigure(1, weight=1)
        self._renderHeader()
        self._updateGrid()

    def getValue(self):
        return [widget.getValue() for widget in self.widgets]

    def _getParamsForWidgetClass(self, widgetClass):
        if not isinstance(self.widgetClass, list):
            return self.widgetClassParams
        if not isinstance(self.widgetClassParams, list):
            return self.widgetClassParams
        for idx, widget in enumerate(self.widgetClass):
            if widget == widgetClass:
                return self.widgetClassParams[idx]
        return None

    def setValue(self, values):
        for i, value in enumerate(values):
            typedWidget = isinstance(value, tuple) \
                and isinstance(value[0], (types.TypeType, types.ClassType))
            if i >= len(self.widgets):
                if typedWidget:
                    self._createWidget(
                        value[0], self._getParamsForWidgetClass(value[0]))
                else:
                    self._addWidget()
            self.widgets[i].setValue(value[1] if typedWidget else value)
        for idx in range(len(values), len(self.widgets)):
            self._removeWidget(len(self.widgets)-1)
        self.winfo_toplevel().event_generate(
            '<<MatchListChanged>>', when='tail')

class GuiFrame(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        self.renderContent()

    def renderContent(self):
        pass

class RepeatableFrame(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        self.renderContent()

    def renderContent(self):
        pass

    def configureContent(self, **kwargs):
        pass

    def getValue(self):
        pass

    def setValue(self, value):
        pass

    @classmethod
    def info(cls):
        return cls.__name__

class RepeatableEntry(RepeatableFrame):
    def renderContent(self):
        self.value = tk.StringVar()
        self.field = ttk.Entry(self, textvariable=self.value)
        self.field.pack(expand=True, fill=tk.BOTH)

    def configureContent(self, **kwargs):
        for param, value in kwargs.iteritems():
            self.field[param] = value

    def getValue(self):
        return self.value.get()

    def setValue(self, value):
        return self.value.set(value)

class ScrollableFrame(tk.Frame):
    def __init__(self, *args, **kwargs):
        vertical = False
        if 'vertical' in kwargs:
            vertical = kwargs['vertical']
            del kwargs['vertical']
        horizontal = False
        if 'horizontal' in kwargs:
            horizontal = kwargs['horizontal']
            del kwargs['horizontal']
        tk.Frame.__init__(self, *args, **kwargs)
        canvas = tk.Canvas(self, borderwidth=0, highlightthickness=0)
        if horizontal:
            hscroll = tk.Scrollbar(
                self, orient=tk.HORIZONTAL, command=canvas.xview)
            hscroll.pack(side=tk.BOTTOM, fill=tk.X)
            canvas.configure(xscrollcommand=hscroll.set)
        if vertical:
            vscroll = tk.Scrollbar(
                self, orient=tk.VERTICAL, command=canvas.yview)
            vscroll.pack(side=tk.RIGHT, fill=tk.Y)
            canvas.configure(yscrollcommand=vscroll.set)
        frame = tk.Frame(canvas, borderwidth=0, highlightthickness=0)
        canvas.pack(side=tk.TOP, fill=tk.BOTH, expand=True)
        canvas.create_window((0,0), window=frame, anchor=tk.N+tk.W)
        frame.bind(
            '<Configure>',
            lambda ev: canvas.configure(scrollregion=canvas.bbox('all')))
        self.renderContent(frame)

    def renderContent(self, container):
        pass

class WidgetSelectionFrame(ScrollableFrame):
    def __init__(self, *args, **kwargs):
        self.widgets = []
        self.callback = None
        for var in ['widgets', 'callback']:
            if var in kwargs:
                setattr(self, var, kwargs[var])
                del kwargs[var]
        ScrollableFrame.__init__(self, *args, **kwargs)
        addBtn = ttk.Button(
            self.master, text='Dodaj', command=self._onConfirm)
        addBtn.pack(side=tk.BOTTOM)

    def renderContent(self, container):
        self.value = tk.IntVar()
        for idx, widget in enumerate(self.widgets):
            (ttk.Radiobutton(
                container, variable=self.value, value=idx,
                text=widget.info())).pack(side=tk.TOP, fill=tk.X, expand=True)

    def _onConfirm(self):
        if self.callback is not None:
            self.callback(self.value.get())
        self.winfo_toplevel().destroy()

class SelectionButton(ttk.Button):
    @property
    def defaultPrompt(self):
        pass

    @property
    def title(self):
        pass

    @property
    def errorMessage(self):
        pass

    def getOptions(self):
        pass

    def __init__(self, *args, **kwargs):
        for arg in ['callback', 'prompt', 'dialogclass']:
            setattr(self, arg, kwargs[arg] if arg in kwargs else None)
            if arg in kwargs:
                del kwargs[arg]
        kwargs['command'] = self._choosePositions
        if self.prompt is None:
            self.prompt = self.defaultPrompt
        ttk.Button.__init__(self, *args, **kwargs)
        self.setPositions([])

    def setPositions(self, values):
        self.selected = values
        self.configure(
            text='[wybrano: %d]' % (len(values)))
        if self.callback is not None:
            self.callback(values)

    def _choosePositions(self):
        options = self.getOptions()
        if not len(options):
            tkMessageBox.showerror(
                self.title, self.errorMessage)
            self.setPositions([])
        else:
            dialog = tk.Toplevel(self)
            dialog.title(self.title)
            dialog.grab_set()
            dialog.focus_force()
            selectionFrame = self.dialogclass(
                dialog, title=self.prompt,
                options=options,
                selected=self.selected,
                callback=self.setPositions, vertical=True)
            selectionFrame.pack(fill=tk.BOTH, expand=True, padx=5, pady=5)

class SelectionFrame(ScrollableFrame):

    def renderOption(self, container, option, idx):
        pass

    def __init__(self, master, title='', options=[],
                 selected=None, callback=None, *args, **kwargs):
        self.values = {}
        self.title = title
        self.options = options
        self.selected = selected
        self.callback = callback
        ScrollableFrame.__init__(self, master=master, *args, **kwargs)
        (ttk.Button(master, text='Zapisz', command=self._save)).pack(
            side=tk.BOTTOM, fill=tk.Y)

    def _mapValue(self, idx, value):
        return idx + 1

    def _save(self):
        if self.callback:
            self.callback(
                [idx for idx, value
                 in self.values.iteritems() if value.get()])
        self.master.destroy()

    def renderHeader(self, container):
        container.columnconfigure(1, weight=1)
        (ttk.Label(container, text=self.title)).grid(
            row=0, column=0, columnspan=2)

    def renderContent(self, container):
        self.renderHeader(container)
        for idx, option in enumerate(self.options):
            key = self._mapValue(idx, option)
            self.values[key] = tk.IntVar()
            self.renderOption(container, option, idx)
            if self.selected and key in self.selected:
                self.values[key].set(True)

class RefreshableOptionMenu(ttk.OptionMenu):
    def __init__(self, *args, **kwargs):
        ttk.OptionMenu.__init__(self, *args, **kwargs)
        self._oldValue = self._variable.get()
        self._variable.trace('w', self._valueSet)
        self._valueLock = False
        self.refreshOptions()

    def refreshOptions(self, *args):
        options = self.getOptions()
        self['menu'].delete(0, tk.END)
        for option in options:
            self['menu'].add_command(
                label=option, command=tk._setit(self._variable, option))
        self._valueLock = True
        self._variable.set(self._oldValue if self._oldValue in options else '')
        self._valueLock = False

    def getOptions(self):
        return [self.getLabel(value) for value in self.getValues()]

    def getLabel(self, value):
        pass

    def getValues(self):
        pass

    def cmpValue(self, value):
        return self._variable.get() == self.getLabel(value)

    def _valueSet(self, *args):
        if not self._valueLock:
            self._valueLock = True
            self._oldValue = self._variable.get()
            for value in self.getValues():
                if self.cmpValue(value):
                    self._variable.set(self.getLabel(value))
                    self._valueLock = False
                    return
            self._variable.set('')
            self._valueLock = False

class TraceableText(tk.Text):
    def __init__(self, *args, **kwargs):
        self._variable = None
        self._variableLock = False
        if 'variable' in kwargs:
            self._variable = kwargs['variable']
            del kwargs['variable']
        tk.Text.__init__(self, *args, **kwargs)
        if self._variable is not None:
            self._orig = self._w + '_orig'
            self.tk.call('rename', self._w, self._orig)
            self.tk.createcommand(self._w, self._proxy)
            self._variable.trace('w', self._fromVariable)

    def _fromVariable(self, *args):
        if not self._variableLock:
            self._variableLock = True
            self.delete('1.0', tk.END)
            self.insert(tk.END, self._variable.get())
            self._varaibleLock = False

    def _proxy(self, command, *args):
        cmd = (self._orig, command) + args
        result = self.tk.call(cmd)
        if command in ('insert', 'delete', 'replace') and \
           not self._variableLock:
            text = self.get('1.0', tk.END).strip()
            self._variableLock = True
            self._variable.set(text)
            self._variableLock = False
        return result

# TODO: NumericSpinBox instead of getIntVal