不怎麼樣: GTK實作之記事本 v1.0

主要倚賴了Glade，否則這麼標準（繁複）的版面，一個字一個字慢慢刻上可是會死人的。

此簡單小程式擁有記事本的基本功能，文件的開啟、修改和儲存；剪貼簿的剪下、複製和貼上；還有挺陽春的搜尋和取代功能。雖然這些都很基本，但還是花了不少時間，且經常陷入瓶頸，不得不說，網路上的幾份技術文件真的幫了大忙，尤其是http://www.bravegnu.org/gtktext，多虧他的幾份有關複製貼上和搜尋的解說和完整程式範例，否則真不之從何下手。感謝Vijay Kumar！

這隻小程式的全部圖片皆取用自mathilde所設計的Sketchy圖示庫，也謝謝他，設計得挺有個性，我很喜歡。

因為程式碼大部分都是Glade自動生成的，所以只貼callbacks.c和support.c。

完整程式碼 + 執行檔：
http://popodragon.myweb.hinet.net/Program/project_Notepad_v1.0.rar

callbacks.c：

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif 
 
#include <gtk/gtk.h>

#include "support.h"
#include "callbacks.h"
#include "interface.h"

const gchar *gSearchWord ;
 
  
void
on________n_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
{
  GtkTextBuffer *buffer;
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview));
  gtk_text_buffer_set_text (buffer, "", 0);

  gtk_window_set_title (GTK_WINDOW (data->window), utf8("新文件"));

}


void
on________o_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
{
  //GtkWidget *dialog = create_file_chooser_open_dialog (GTK_WINDOW(window));
   
   
  GtkWidget *dialog = gtk_file_chooser_dialog_new ("Open File",
                               GTK_WINDOW(data->window),
                                        GTK_FILE_CHOOSER_ACTION_OPEN,
                                        GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                        GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, 
                                        NULL);
  
  if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
  {
    char *filename;

    filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
    open_file (filename, GTK_TEXT_VIEW (data->textview));
    
    gtk_window_set_title (GTK_WINDOW (data->window), filename);
    g_free (filename);
  }
  
  gtk_widget_destroy (dialog);

}


void
on________s_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
// 儲存檔案  
{
  GtkWidget *dialog;

  dialog = gtk_file_chooser_dialog_new ("Save File",
                                     GTK_WINDOW(data->window),
                                     GTK_FILE_CHOOSER_ACTION_SAVE,
                                     GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
                                    GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
                                    NULL);

  gtk_file_chooser_set_do_overwrite_confirmation (GTK_FILE_CHOOSER (dialog), TRUE);
  
  if (0)//user_edited_a_new_document)
  {
    gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (dialog), "NEW.txt");//default_folder_for_saving);
    gtk_file_chooser_set_current_name (GTK_FILE_CHOOSER (dialog), "Untitled document");
  }
  else
    gtk_file_chooser_set_filename (GTK_FILE_CHOOSER (dialog), "OLD.txt");//filename_for_existing_document);


  if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT)
  {
    char *filename;

    filename = gtk_file_chooser_get_filename (GTK_FILE_CHOOSER (dialog));
    save_to_file (filename, GTK_TEXT_VIEW (data->textview));
    gtk_window_set_title (GTK_WINDOW (data->window), filename);
    g_free (filename);
  }
  
  gtk_widget_destroy (dialog);

}


void
on______________a_1_activate           (GtkMenuItem     *menuitem,
                                        AD         data)
{

}


void
on________q_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
// 離開 
{
  gtk_widget_destroy(data->window);
}


void
on________t_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
// 剪下 
{
  GtkTextBuffer *buffer;
  GtkClipboard *clipboard; 
  
  // 若GDK_NONE不行就換GDK_SELECTION_PRIMARY 
  clipboard = gtk_clipboard_get( GDK_NONE ); // 取得反白選取的部份 
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview)); // 取得整個編輯緩衝區 
  
  gtk_text_buffer_cut_clipboard (buffer, clipboard, TRUE); // 將反白選取的部份剪下到剪貼簿 

}


void
on________c_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
// 複製 
{
  GtkTextBuffer *buffer;
  GtkClipboard *clipboard;
  
  clipboard = gtk_clipboard_get( GDK_NONE ); // 取得反白選取的部份 
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview)); // 取得整個編輯緩衝區 
  
  gtk_text_buffer_copy_clipboard (buffer, clipboard); // 將反白選取的部份複製到剪貼簿 

}


void
on________p_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
// 貼上 
{
  GtkTextBuffer *buffer;
  GtkClipboard *clipboard;
  
  clipboard = gtk_clipboard_get( GDK_NONE ); // 取得反白選取的部份 
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview)); // 取得整個編輯緩衝區 
  
  gtk_text_buffer_paste_clipboard (buffer, clipboard, NULL, TRUE); // 將剪貼簿的內容貼到指定區域 

}


void
on________d_1_activate                 (GtkMenuItem     *menuitem,
                                        AD         data)
// 刪除 
{
  GtkTextBuffer *buffer;
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview)); // 取得整個編輯緩衝區 
  
  gtk_text_buffer_delete_selection (buffer, TRUE, TRUE); // 將反白選取的部份刪除 
}


void
on_about1_activate                     (GtkMenuItem     *menuitem,
                                        AD         data)
// 開啟關於dialog 
{
  GtkWidget *dialog1_information = create_dialog1_information ();
  gtk_widget_show (dialog1_information);
  gtk_dialog_run (GTK_DIALOG (dialog1_information));
  gtk_widget_destroy (dialog1_information);

}


void
on_mainfile1_activate                  (GtkMenuItem     *menuitem,
                                        AD         data)
// 開啟main.c 
{
    char *filename; 

    filename = "..\\src\\main.c";
    open_file (filename, GTK_TEXT_VIEW (data->textview));
    
    gtk_window_set_title (GTK_WINDOW (data->window), filename);
    g_free (filename);
}

 
void
on_interfacefile1_activate             (GtkMenuItem     *menuitem,
                                        AD         data)
// 開啟interface.c 
{ 
    char *filename;

    filename = "..\\src\\support.c";
    open_file (filename, GTK_TEXT_VIEW (data->textview));
    
    gtk_window_set_title (GTK_WINDOW (data->window), filename);
    g_free (filename);

}


void
on_callbacksfile1_activate             (GtkMenuItem     *menuitem,
                                        AD         data)
// 開啟callbacks.c
{
    char *filename;

    filename = "..\\src\\callbacks.c";
    open_file (filename, GTK_TEXT_VIEW (data->textview));
    
    gtk_window_set_title (GTK_WINDOW (data->window), filename);
    g_free (filename);

}

 
void
on_quit1_activate                      (GtkMenuItem     *menuitem,
                                        AD         data)
// 離開 
{

}
  
void 
on_search_button_clicked (GtkWidget *search_button, AD data)
// 搜尋按鈕的功能 
{
  const gchar *text = "";
  GtkTextBuffer *buffer;
  GtkTextIter iter;
  int result = 0 ;
    
  GtkWidget *search_dialog = create_search_dialog (data);
  gtk_widget_show (search_dialog); 
  
  //result = gtk_dialog_run (GTK_DIALOG (search_dialog));
  
   
  //gtk_widget_destroy (search_dialog);
}
 
void
on_search_cancelbutton_clicked (GtkWidget *button, gpointer search_dialog)
// 銷毀search dialog 
{
  gtk_widget_destroy (search_dialog);
}
 

 
void
on_search_okbutton_clicked (GtkWidget *search_button, AD data)
// 搜尋按鈕的功能，可連續搜尋 
{
  const gchar *text = "e";
  GtkTextBuffer *buffer;
  GtkTextIter iter;
  GtkTextMark *last_pos;
  int result = 0 ; 
  gboolean found = FALSE;  
    
  data->searchWord = gtk_entry_get_text (GTK_ENTRY (data->entry)); // 取得輸入欄的字串 
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview)); 
  
  last_pos = gtk_text_buffer_get_mark (buffer, "last_pos"); // 查看有無last_pos的mark 
  if (last_pos == NULL)
    gtk_text_buffer_get_start_iter (buffer, &iter); // 若無，就從頭搜尋 
  else
    gtk_text_buffer_get_iter_at_mark (buffer, &iter, last_pos); // 若有，就從最後一個last_pos的後面開始搜尋 
  
  found = find (GTK_TEXT_VIEW (data->textview), data->searchWord, &iter);
  
  if (!found)
    gtk_text_buffer_delete_mark (buffer, last_pos); // 搜尋到最後可回到起點重新搜尋 
}
 

void
on_next_button_clicked (GtkWidget *next_button, GdkEventKey *event, AD data)
// 按下『F3』找下一個符合字串 
// ＊因為無法把searchWord正確傳遞，所以無法正常使用此函式。 
{
  const gchar *text;
  GtkTextBuffer *buffer;
  GtkTextMark *last_pos;
  GtkTextIter iter;
   
  if ( !strcmp( gdk_keyval_name( event->keyval ), "F3" ) ) {
         
    
    text = "e" ; // 預設搜尋e 
    //text = data->searchWord;
    
    buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview));

    last_pos = gtk_text_buffer_get_mark (buffer, "last_pos");
    if (last_pos == NULL)
      gtk_text_buffer_get_start_iter (buffer, &iter); // 若無，就從頭搜尋 
    else
      gtk_text_buffer_get_iter_at_mark (buffer, &iter, last_pos);
    //find (GTK_TEXT_VIEW (data->textview), text, &iter);
    
    find (GTK_TEXT_VIEW (data->textview), text, &iter);
  
  }
}


void 
on_replace_button_clicked (GtkWidget *replace_button, AD data)
// 搜尋按鈕的功能 
{
  const gchar *text = "";
  GtkTextBuffer *buffer;
  GtkTextIter iter;
  int result = 0 ;
    
  GtkWidget *replace_dialog = create_replace_dialog (data);
  gtk_widget_show (replace_dialog); 
  //result = gtk_dialog_run (GTK_DIALOG (search_dialog));
   
  //gtk_widget_destroy (search_dialog);
}
 
void
on_replace_cancelbutton_clicked (GtkWidget *button, gpointer replace_dialog)
// 銷毀replace dialog 
{
  gtk_widget_destroy (replace_dialog);
}

 
void
on_replace_okbutton_clicked (GtkWidget *replace_button, AD data)
// 取代按鈕的功能，可連續取代 
{
  const gchar *text = "e";
  GtkTextBuffer *buffer;
  GtkTextIter iter;
  GtkTextMark *last_pos;
  int result = 0 ; 
    
  data->searchWord = gtk_entry_get_text (GTK_ENTRY (data->entry)); // 取得輸入欄的字串 
  data->replaceWord = gtk_entry_get_text (GTK_ENTRY (data->entry2)); // 取得輸入欄的字串
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (data->textview)); 
  
  last_pos = gtk_text_buffer_get_mark (buffer, "last_pos"); // 查看有無last_pos的mark 
  if (last_pos == NULL)
    gtk_text_buffer_get_start_iter (buffer, &iter); // 若無，就從頭搜尋 
  else
    gtk_text_buffer_get_iter_at_mark (buffer, &iter, last_pos); // 若有，就從最後一個last_pos的後面開始搜尋 
  
  replace (GTK_TEXT_VIEW (data->textview), data->searchWord, data->replaceWord, &iter);
  
}

support.c：

/*
 * DO NOT EDIT THIS FILE - it is generated by Glade.
 */
  
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/types.h> 
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <string.h>
#include <stdio.h>

#include <gtk/gtk.h>
#include <glib.h>

#include "support.h"  


 

 

gchar *utf8( const char *str )
// 解決無法顯示中文的窘境
{
  return g_locale_to_utf8( str, -1, NULL, NULL, NULL);
}

gchar *fromUtf8( const char *str )
{
  return g_locale_from_utf8 (str, -1, NULL, NULL, NULL);
}


void replace (GtkTextView *text_view, const gchar *text, const gchar *replaceText, GtkTextIter *iter)
// 取代主函式 
{
  GtkTextIter mstart, mend; 
  GtkTextBuffer *buffer;
  gboolean found;
  GtkTextMark *last_pos;
  GtkClipboard *clipboard;

  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
  found = gtk_text_iter_forward_search (iter, text, 0, &mstart, &mend, NULL);

  if (found)
  {
    clipboard = gtk_clipboard_get( GDK_NONE ); // 取得反白選取的部份
    
    
    gtk_text_buffer_cut_clipboard (buffer, clipboard, TRUE); // 剪下選取的反白字串 
    gtk_clipboard_set_text (clipboard, replaceText, -1); // 將剪貼簿修改為replaceText 
    
    
    gtk_text_buffer_select_range (buffer, &mstart, &mend);
    last_pos = gtk_text_buffer_create_mark (buffer, "last_pos", &mend, FALSE); // 註記起來 之後才可往下搜尋 
      
    gtk_text_view_scroll_mark_onscreen(text_view, last_pos); // 移動捲軸 可追蹤目前搜尋的位置 
    
    gtk_text_buffer_paste_clipboard (buffer, clipboard, &mend, TRUE); // 將剪貼簿的內容貼到指定區域 
    
  }
}


gboolean find (GtkTextView *text_view, const gchar *text, GtkTextIter *iter)
// 搜尋主函式 
{
  GtkTextIter mstart, mend;
  GtkTextBuffer *buffer;
  gboolean found;
  GtkTextMark *last_pos;

  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text_view));
  found = gtk_text_iter_forward_search (iter, text, 0, &mstart, &mend, NULL);

  if (found)
  {
    gtk_text_buffer_select_range (buffer, &mstart, &mend);
    last_pos = gtk_text_buffer_create_mark (buffer, "last_pos", &mend, FALSE); // 註記起來 之後才可往下搜尋 
      
    gtk_text_view_scroll_mark_onscreen(text_view, last_pos); // 移動捲軸 可追蹤目前搜尋的位置 
  }
  
  return found ;
}



void 
open_file(gchar *filename, GtkTextView *textView) 
// 開啟文件檔並顯示在textview上
// 目前瓶頸：無法開啟UTF-16編碼的文件
{
  gchar *content, *content2, *ascii2utf8; 
  gsize bytes, bytes_read, bytes_written;
  GError *error = NULL; 
  GtkTextBuffer *buffer; 
  
  buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW (textView));
    
  g_file_get_contents (filename, &content, &bytes, &error);
   
  //g_file_set_contents ("TEST.txt", content, bytes, &error);
  //g_convert (content, -1, "UTF-16", "UTF-8", NULL, NULL, &error);
  
  ascii2utf8 = g_locale_to_utf8( content, -1, NULL, NULL, &error);
  
  if (error) // 若不能轉換，代表原本就是utf-8了 
    gtk_text_buffer_set_text (buffer, content, -1); // 用來開UTF-8文件   
  else
    gtk_text_buffer_set_text (buffer, ascii2utf8, -1); // 用來開ANSI文件 
  
  free (content);
  free (ascii2utf8);
}

void  save_to_file(gchar *filename, GtkTextView *textView)
// 將緩衝區的文字儲存到名為filename的檔案裡 
{
  gchar *content; 
  gsize bytes;
  GError *error = NULL;
  GtkTextBuffer *buffer;
  GtkTextIter start, end;
  
  buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (textView));

  gtk_text_buffer_get_bounds (GTK_TEXT_BUFFER (buffer), &start, &end);/*取得開始和結束位置的Iter*/


  content = gtk_text_buffer_get_text (GTK_TEXT_BUFFER (buffer), &start, &end, FALSE);/*取得整份文字資料*/
   
  g_file_set_contents (filename, content, -1, &error);
  
  
}




// ================以下為本來有的============== 

GtkWidget*
lookup_widget                          (GtkWidget       *widget,
                                        const gchar     *widget_name)
{
  GtkWidget *parent, *found_widget;

  for (;;)
    {
      if (GTK_IS_MENU (widget))
        parent = gtk_menu_get_attach_widget (GTK_MENU (widget));
      else
        parent = widget->parent;
      if (!parent)
        parent = (GtkWidget*) g_object_get_data (G_OBJECT (widget), "GladeParentKey");
      if (parent == NULL)
        break;
      widget = parent;
    }

  found_widget = (GtkWidget*) g_object_get_data (G_OBJECT (widget),
                                                 widget_name);
  if (!found_widget)
    g_warning ("Widget not found: %s", widget_name);
  return found_widget;
}

static GList *pixmaps_directories = NULL;

/* Use this function to set the directory containing installed pixmaps. */
void
add_pixmap_directory                   (const gchar     *directory)
{
  pixmaps_directories = g_list_prepend (pixmaps_directories,
                                        g_strdup (directory));
}

/* This is an internally used function to find pixmap files. */
static gchar*
find_pixmap_file                       (const gchar     *filename)
{
  GList *elem;

  /* We step through each of the pixmaps directory to find it. */
  elem = pixmaps_directories;
  while (elem)
    {
      gchar *pathname = g_strdup_printf ("%s%s%s", (gchar*)elem->data,
                                         G_DIR_SEPARATOR_S, filename);
      if (g_file_test (pathname, G_FILE_TEST_EXISTS))
        return pathname;
      g_free (pathname);
      elem = elem->next;
    }
  return NULL;
}

/* This is an internally used function to create pixmaps. */
GtkWidget*
create_pixmap                          (GtkWidget       *widget,
                                        const gchar     *filename)
{
  gchar *pathname = NULL;
  GtkWidget *pixmap;

  if (!filename || !filename[0])
      return gtk_image_new ();

  pathname = find_pixmap_file (filename);

  if (!pathname)
    {
      g_warning (_("Couldnt find pixmap file: %s"), filename);
      return gtk_image_new ();
    }

  pixmap = gtk_image_new_from_file (pathname);
  g_free (pathname);
  return pixmap;
}

/* This is an internally used function to create pixmaps. */
GdkPixbuf*
create_pixbuf                          (const gchar     *filename)
{
  gchar *pathname = NULL;
  GdkPixbuf *pixbuf;
  GError *error = NULL;

  if (!filename || !filename[0])
      return NULL;

  pathname = find_pixmap_file (filename);

  if (!pathname)
    {
      g_warning (_("Couldnt find pixmap file: %s"), filename);
      return NULL;
    }

  pixbuf = gdk_pixbuf_new_from_file (pathname, &error);
  if (!pixbuf)
    {
      fprintf (stderr, "Failed to load pixbuf file: %s: %s\n",
               pathname, error->message);
      g_error_free (error);
    }
  g_free (pathname);
  return pixbuf;
}

/* This is used to set ATK action descriptions. */
void
glade_set_atk_action_description       (AtkAction       *action,
                                        const gchar     *action_name,
                                        const gchar     *description)
{
  gint n_actions, i;

  n_actions = atk_action_get_n_actions (action);
  for (i = 0; i < n_actions; i++)
    {
      if (!strcmp (atk_action_get_name (action, i), action_name))
        atk_action_set_description (action, i, description);
    }
}

不怎麼樣

GTK實作之記事本 v1.0

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