185 lines
6.8 KiB
Python
185 lines
6.8 KiB
Python
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'''Define SearchDialogBase used by Search, Replace, and Grep dialogs.'''
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from tkinter import (Toplevel, Frame, Entry, Label, Button,
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Checkbutton, Radiobutton)
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class SearchDialogBase:
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'''Create most of a 3 or 4 row, 3 column search dialog.
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The left and wide middle column contain:
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1 or 2 labeled text entry lines (make_entry, create_entries);
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a row of standard Checkbuttons (make_frame, create_option_buttons),
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each of which corresponds to a search engine Variable;
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a row of dialog-specific Check/Radiobuttons (create_other_buttons).
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The narrow right column contains command buttons
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(make_button, create_command_buttons).
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These are bound to functions that execute the command.
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Except for command buttons, this base class is not limited to items
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common to all three subclasses. Rather, it is the Find dialog minus
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the "Find Next" command, its execution function, and the
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default_command attribute needed in create_widgets. The other
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dialogs override attributes and methods, the latter to replace and
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add widgets.
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'''
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title = "Search Dialog" # replace in subclasses
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icon = "Search"
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needwrapbutton = 1 # not in Find in Files
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def __init__(self, root, engine):
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'''Initialize root, engine, and top attributes.
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top (level widget): set in create_widgets() called from open().
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text (Text searched): set in open(), only used in subclasses().
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ent (ry): created in make_entry() called from create_entry().
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row (of grid): 0 in create_widgets(), +1 in make_entry/frame().
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default_command: set in subclasses, used in create_widgers().
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title (of dialog): class attribute, override in subclasses.
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icon (of dialog): ditto, use unclear if cannot minimize dialog.
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'''
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self.root = root
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self.engine = engine
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self.top = None
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def open(self, text, searchphrase=None):
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"Make dialog visible on top of others and ready to use."
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self.text = text
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if not self.top:
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self.create_widgets()
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else:
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self.top.deiconify()
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self.top.tkraise()
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if searchphrase:
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self.ent.delete(0,"end")
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self.ent.insert("end",searchphrase)
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self.ent.focus_set()
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self.ent.selection_range(0, "end")
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self.ent.icursor(0)
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self.top.grab_set()
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def close(self, event=None):
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"Put dialog away for later use."
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if self.top:
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self.top.grab_release()
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self.top.withdraw()
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def create_widgets(self):
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'''Create basic 3 row x 3 col search (find) dialog.
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Other dialogs override subsidiary create_x methods as needed.
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Replace and Find-in-Files add another entry row.
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'''
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top = Toplevel(self.root)
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top.bind("<Return>", self.default_command)
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top.bind("<Escape>", self.close)
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top.protocol("WM_DELETE_WINDOW", self.close)
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top.wm_title(self.title)
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top.wm_iconname(self.icon)
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self.top = top
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self.row = 0
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self.top.grid_columnconfigure(0, pad=2, weight=0)
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self.top.grid_columnconfigure(1, pad=2, minsize=100, weight=100)
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self.create_entries() # row 0 (and maybe 1), cols 0, 1
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self.create_option_buttons() # next row, cols 0, 1
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self.create_other_buttons() # next row, cols 0, 1
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self.create_command_buttons() # col 2, all rows
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def make_entry(self, label_text, var):
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'''Return (entry, label), .
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entry - gridded labeled Entry for text entry.
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label - Label widget, returned for testing.
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'''
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label = Label(self.top, text=label_text)
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label.grid(row=self.row, column=0, sticky="nw")
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entry = Entry(self.top, textvariable=var, exportselection=0)
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entry.grid(row=self.row, column=1, sticky="nwe")
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self.row = self.row + 1
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return entry, label
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def create_entries(self):
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"Create one or more entry lines with make_entry."
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self.ent = self.make_entry("Find:", self.engine.patvar)[0]
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def make_frame(self,labeltext=None):
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'''Return (frame, label).
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frame - gridded labeled Frame for option or other buttons.
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label - Label widget, returned for testing.
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'''
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if labeltext:
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label = Label(self.top, text=labeltext)
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label.grid(row=self.row, column=0, sticky="nw")
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else:
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label = ''
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frame = Frame(self.top)
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frame.grid(row=self.row, column=1, columnspan=1, sticky="nwe")
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self.row = self.row + 1
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return frame, label
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def create_option_buttons(self):
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'''Return (filled frame, options) for testing.
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Options is a list of SearchEngine booleanvar, label pairs.
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A gridded frame from make_frame is filled with a Checkbutton
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for each pair, bound to the var, with the corresponding label.
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'''
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frame = self.make_frame("Options")[0]
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engine = self.engine
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options = [(engine.revar, "Regular expression"),
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(engine.casevar, "Match case"),
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(engine.wordvar, "Whole word")]
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if self.needwrapbutton:
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options.append((engine.wrapvar, "Wrap around"))
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for var, label in options:
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btn = Checkbutton(frame, anchor="w", variable=var, text=label)
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btn.pack(side="left", fill="both")
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if var.get():
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btn.select()
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return frame, options
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def create_other_buttons(self):
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'''Return (frame, others) for testing.
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Others is a list of value, label pairs.
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A gridded frame from make_frame is filled with radio buttons.
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'''
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frame = self.make_frame("Direction")[0]
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var = self.engine.backvar
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others = [(1, 'Up'), (0, 'Down')]
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for val, label in others:
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btn = Radiobutton(frame, anchor="w",
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variable=var, value=val, text=label)
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btn.pack(side="left", fill="both")
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if var.get() == val:
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btn.select()
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return frame, others
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def make_button(self, label, command, isdef=0):
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"Return command button gridded in command frame."
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b = Button(self.buttonframe,
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text=label, command=command,
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default=isdef and "active" or "normal")
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cols,rows=self.buttonframe.grid_size()
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b.grid(pady=1,row=rows,column=0,sticky="ew")
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self.buttonframe.grid(rowspan=rows+1)
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return b
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def create_command_buttons(self):
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"Place buttons in vertical command frame gridded on right."
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f = self.buttonframe = Frame(self.top)
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f.grid(row=0,column=2,padx=2,pady=2,ipadx=2,ipady=2)
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b = self.make_button("close", self.close)
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b.lower()
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if __name__ == '__main__':
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import unittest
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unittest.main(
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'idlelib.idle_test.test_searchdialogbase', verbosity=2)
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