Lesson 9:ファイルを読み込む

/**** ファイル名 : BTinyEditor.h ****/

#ifndef BTINYEDITORAPP 
#define BTINYEDITORAPP 
//--------------------------------------------------------------------- 
#include <Be.h> 
#include "MainWindow.h" 
//--------------------------------------------------------------------- 
#define APPLICATION_SIGNATURE   "application/x-vnd.vow-betinyeditor" 
//--------------------------------------------------------------------- 
class BTinyEditorApp : public BApplication 
{ 
private:
    BFilePanel *open_filepanel;
public: 
    BTinyEditorApp() 
        :BApplication(APPLICATION_SIGNATURE) 
    { 
        BEditorWindow *mainwnd=new BEditorWindow( 
            BRect(MAINWINDOW_POSITION_LEFT,MAINWINDOW_POSITION_TOP, 
                  MAINWINDOW_POSITION_WIDTH+MAINWINDOW_POSITION_LEFT-1, 
                  MAINWINDOW_POSITION_HEIGHT+MAINWINDOW_POSITION_TOP-1), 
            MAINWINDOW_TITLE);
        
        open_filepanel= new BFilePanel(); 
        mainwnd->Show();
    };
    //----------------------------------------------------------------- 
    ~BTinyEditorApp()
    {
        delete open_filepanel;
    };
    //----------------------------------------------------------------- 
    void MessageReceived(BMessage *msg) 
    { 
        switch(msg->what) 
        {        
            case MSG_OPEN:
                open_filepanel->Show();
                break; 
            default: 
                BApplication::MessageReceived(msg); 
        } 
    }; 
}; 
//--------------------------------------------------------------------- 
#endif 

/**** ファイル名 : MainWindow.cpp ****/

//--------------------------------------------------------------------- 
BEditorView::BEditorView(BRect frame) 
    :BView(frame,"beditorview",B_FOLLOW_ALL,B_WILL_DRAW) 
{ 
    BRect viewrect(Bounds()); 
    BMenuBar *mainmenu=new BMenuBar(BRect(0,0,viewrect.right, 
                                          be_plain_font->Size()*2), 
                                    "mainmenubar"); 
    AddChild(mainmenu); 

    memo=new BMemoView(BRect(0,be_plain_font->Size()*2, 
                 viewrect.right-B_V_SCROLL_BAR_WIDTH, 
                 viewrect.bottom-B_H_SCROLL_BAR_HEIGHT), 
               "memo",B_FOLLOW_ALL); 
    BScrollView *scr=new BScrollView("memoscroll",memo, 
                     B_FOLLOW_ALL,0,true,true); 
    AddChild(scr); 

    BMenu *filemenu=new BMenu("File"); 
    filemenu->AddItem(new BMenuItem("Open...",new BMessage(MSG_OPEN)));
    filemenu->ItemAt(0)->SetTarget(be_app); 
    filemenu->AddItem(new BMenuItem("Save",new BMessage(MSG_SAVE))); 
    filemenu->AddItem(new BMenuItem("Save As...",new BMessage(MSG_SAVEAS))); 
    filemenu->AddSeparatorItem(); 
    filemenu->AddItem(new BMenuItem("Quit",new BMessage(B_QUIT_REQUESTED))); 
    mainmenu->AddItem(filemenu); 

    BMenu *editmenu=new BMenu("Edit"); 
    editmenu->AddItem(new BMenuItem("Undo",new BMessage(B_UNDO))); 
    editmenu->AddSeparatorItem(); 
    editmenu->AddItem(new BMenuItem("Copy",new BMessage(B_COPY))); 
    editmenu->AddItem(new BMenuItem("Cut",new BMessage(B_CUT))); 
    editmenu->AddItem(new BMenuItem("Paste",new BMessage(B_PASTE))); 
    editmenu->AddItem(new BMenuItem("Select All",new BMessage(B_SELECT_ALL))); 
    mainmenu->AddItem(editmenu); 

    memo->SetDoesUndo(true); 
} 
//--------------------------------------------------------------------- 

/**** ファイル名 : BTinyEditor.h ****/

    void RefsReceived(BMessage *message)
    {
        type_code ref_type;
        int32 ref_count;
        entry_ref ref;
        BEntry entry;
        
        message->GetInfo("refs", &ref_type,&ref_count);
        for (int i=0;i<ref_count;i++)
        {
            message->FindRef("refs",i,&ref);
            if(entry.SetTo(&ref)==B_OK)
            {
                WindowAt(0)->Lock();
                ((BEditorWindow *)WindowAt(0))->OpenFile(&entry);
                WindowAt(0)->Unlock();
                return;
            }
        }
    }

message->GetInfo("refs", &ref_type,&ref_count);

message->FindRef("refs",i,&ref);

/**** ファイル名 : MainWindow.h ****/

//--------------------------------------------------------------------- 
class BEditorWindow : public BWindow 
{ 
public: 
    BEditorView *mainview; 
    //----------------------------------------------------------------- 
    BEditorWindow(BRect frame,const char *title); 
    virtual void MessageReceived(BMessage *msg); 
    void OpenFile(BEntry *entry);
    //----------------------------------------------------------------- 
    bool QuitRequested() 
    { 
        be_app->PostMessage(B_QUIT_REQUESTED); 
        return true; 
    }; 
}; 
//--------------------------------------------------------------------- 

/**** ファイル名 : MainWindow.cpp ****/

//--------------------------------------------------------------------- 
void BEditorWindow::OpenFile(BEntry *entry)
{
    if(entry->Exists())
    {
        BFile fil;
        off_t size;
                
        fil.SetTo(entry,B_READ_ONLY);
        fil.GetSize(&size);
        ((BTextView *)FindView("memo"))->SetText(&fil,0,size);
    }
}
//---------------------------------------------------------------------