用pygtk寫的圖片檢視器

前面有教過GLADE產生gtk ui,現在使用GLADE再產生filechosserbutton(檔案選擇器按鈕),如下圖左上角,訊號處理打上一個method(這我打上IMAGE_VIEWER),使用者資料選image(這裡我選image1),下面MAGE_VIEWE就是處理檔案選擇器按鈕被按下後的方法


def IMAGE_VIEWER(self, widget, *event):
        file=self.filechooserbutton.get_filename()
        #print(str(self.filechooserbutton.get_current_folder_uri()))
        #print(str(file))
        widget.set_from_file(file)

看一下pygtk手冊filechosserbutton繼承如下,在FileChooser找到取得file名稱的方法get_filename(),

+-- gobject.GObject
  +-- gtk.Object
    +-- gtk.Widget
      +-- gtk.Container
        +-- gtk.Box
           +-- gtk.HBox
             +-- gtk.FileChooserButton (implements gtk.FileChooser)

 file=self.filechooserbutton.get_filename()取得file路徑名稱的方法

 widget.set_from_file(file)把imgage設成 file,圖片就改變了,widget變數是指信號處理對象（GLADE敲入IMAGE_VIEWER信號時,選的那個信號處理對象)

 再來是用GLADE產生檔案過濾器,我只想要jpg或png檔,如下圖1,filechooserbutton的一般條件選filefilter1,動作選開啟

 b然後widgets會出現filter1,點它,如下圖2,一般的模式中敲入要過濾條件(*.jpg......),如此,filechooser只會顯示過濾條件的檔案

python程式如下

 #!/usr/bin/env python
# -*- Mode: Python; coding: utf-8; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*-
#
# main.py
# Copyright (C) 2015 yplin
#
# pygtk-foobar_u1410 is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# pygtk-foobar_u1410 is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program.  If not, see .

from gi.repository import Gtk, GdkPixbuf, Gdk

import os, sys


#Comment the first line and uncomment the second before installing
#or making the tarball (alternatively, use project variables)
UI_FILE = "src/pygtk_foobar_u1410.ui"
#UI_FILE = "/usr/local/share/pygtk_foobar_u1410/ui/pygtk_foobar_u1410.ui"


class GUI:
    def __init__(self):
        #新建了一個xml-gtk
        self.builder = Gtk.Builder()
        #把UI_FILE加到gtk,glade產生的xml
        self.builder.add_from_file(UI_FILE)
        #建立xml信號連結
        self.builder.connect_signals(self)
        #取得xml UI上所有元件
        self.label=self.builder.get_object('label1')
        self.button2=self.builder.get_object('button2')
        self.button1=self.builder.get_object('button1')
        self.button3=self.builder.get_object('button3')
        self.window=self.builder.get_object('window')
        self.fixed=self.builder.get_object('fixed1')
        self.filechooserbutton=self.builder.get_object('filechooserbutton1')
        self.image=self.builder.get_object('image1')
        self.image.set_from_file("/home/yplin/lion.png")
    def on_window_destroy(self, widget, *event):
        Gtk.main_quit()
   
   
       
    def SHOW(self, widget, *event):
       
        #self.label.set_text(self.button2.get_label())
        #get_focus可取得激活對象
        bt_active_label=self.window.get_focus().get_label()
        #widget是指信號處理對象,用GALADE創建UI時,是為label1
        widget.set_text(bt_active_label)
        #print(user_data)
        #widget.hide()
        #除錯技巧,印出
        #print(str(self.window.get_focus().get_label()))
        #self.button1.set_label("JJJJJJ")
        #重設label位置
        #self.fixed.put(self.label, 80, 40)
    def SHOW_IMAGE(self, widget, *event):
        #取得激活對象按鈕名稱
        bt_active_label=self.window.get_focus().get_label()
        #根據按鈕名稱,顯示或隱藏圖片
        if bt_active_label=='隱藏圖片':widget.hide()
        if bt_active_label=='顯示圖片':widget.show()
        if bt_active_label=='離開':Gtk.main_quit()
    def IMAGE_VIEWER(self, widget, *event):
        #取得file
        file=self.filechooserbutton.get_filename()
        #print(str(self.filechooserbutton.get_current_folder_uri()))
        #print(str(file))
        #file加入image
        widget.set_from_file(file)
def main():
    app = GUI()
    app.window.show()
    Gtk.main()
   
   
if __name__ == "__main__":
    sys.exit(main())

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