wxWidgets/samples/htlbox/htlbox.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: htmllbox.cpp
// Purpose: HtmlLbox wxWidgets sample
// Author: Vadim Zeitlin
// Modified by:
// Created: 31.05.03
// RCS-ID: $Id$
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// For compilers that support precompilation, includes "wx/wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
// for all others, include the necessary headers
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/frame.h"
#include "wx/log.h"
#include "wx/textdlg.h"
#include "wx/sizer.h"
#include "wx/menu.h"
#include "wx/msgdlg.h"
#include "wx/textctrl.h"
#include "wx/dc.h"
#endif
#include "wx/colordlg.h"
#include "wx/numdlg.h"
#include "wx/htmllbox.h"
// you can also have a file containing HTML strings for testing, enable this if
// you want to use it
//#define USE_HTML_FILE
#ifdef USE_HTML_FILE
#include "wx/textfile.h"
#endif
// ----------------------------------------------------------------------------
// resources
// ----------------------------------------------------------------------------
// the application icon (under Windows and OS/2 it is in resources)
#if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
#include "mondrian.xpm"
#endif
// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------
// to use wxHtmlListBox you must derive a new class from it as you must
// implement pure virtual OnGetItem()
class MyHtmlListBox : public wxHtmlListBox
{
public:
MyHtmlListBox(wxWindow *parent, bool multi = false);
void SetChangeSelFg(bool change) { m_change = change; }
protected:
virtual wxString OnGetItem(size_t n) const;
// change the appearance by overriding these functions
virtual void OnDrawSeparator(wxDC& dc, wxRect& rect, size_t n) const;
virtual wxColour GetSelectedTextColour(const wxColour& colFg) const;
bool m_change;
#ifdef USE_HTML_FILE
wxTextFile m_file;
#endif
DECLARE_NO_COPY_CLASS(MyHtmlListBox)
};
class MyFrame : public wxFrame
{
public:
MyFrame();
virtual ~MyFrame();
// event handlers
void OnQuit(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
void OnSetMargins(wxCommandEvent& event);
void OnDrawSeparator(wxCommandEvent&) { m_hlbox->RefreshAll(); }
void OnToggleMulti(wxCommandEvent& event);
void OnSelectAll(wxCommandEvent& event);
void OnSetBgCol(wxCommandEvent& event);
void OnSetSelBgCol(wxCommandEvent& event);
void OnSetSelFgCol(wxCommandEvent& event);
void OnUpdateUISelectAll(wxUpdateUIEvent& event);
void OnLboxSelect(wxCommandEvent& event);
void OnLboxDClick(wxCommandEvent& event)
{
wxLogMessage(_T("Listbox item %ld double clicked."), event.GetInt());
}
private:
MyHtmlListBox *m_hlbox;
// any class wishing to process wxWidgets events must use this macro
DECLARE_EVENT_TABLE()
};
class MyApp : public wxApp
{
public:
virtual bool OnInit() { (new MyFrame())->Show(); return true; }
};
// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------
// IDs for the controls and the menu commands
enum
{
// menu items
HtmlLbox_Quit = 1,
HtmlLbox_SetMargins,
HtmlLbox_DrawSeparator,
HtmlLbox_ToggleMulti,
HtmlLbox_SelectAll,
HtmlLbox_SetBgCol,
HtmlLbox_SetSelBgCol,
HtmlLbox_SetSelFgCol,
// it is important for the id corresponding to the "About" command to have
// this standard value as otherwise it won't be handled properly under Mac
// (where it is special and put into the "Apple" menu)
HtmlLbox_About = wxID_ABOUT
};
// ----------------------------------------------------------------------------
// event tables and other macros for wxWidgets
// ----------------------------------------------------------------------------
BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(HtmlLbox_Quit, MyFrame::OnQuit)
EVT_MENU(HtmlLbox_SetMargins, MyFrame::OnSetMargins)
EVT_MENU(HtmlLbox_DrawSeparator, MyFrame::OnDrawSeparator)
EVT_MENU(HtmlLbox_ToggleMulti, MyFrame::OnToggleMulti)
EVT_MENU(HtmlLbox_SelectAll, MyFrame::OnSelectAll)
EVT_MENU(HtmlLbox_About, MyFrame::OnAbout)
EVT_MENU(HtmlLbox_SetBgCol, MyFrame::OnSetBgCol)
EVT_MENU(HtmlLbox_SetSelBgCol, MyFrame::OnSetSelBgCol)
EVT_MENU(HtmlLbox_SetSelFgCol, MyFrame::OnSetSelFgCol)
EVT_UPDATE_UI(HtmlLbox_SelectAll, MyFrame::OnUpdateUISelectAll)
EVT_LISTBOX(wxID_ANY, MyFrame::OnLboxSelect)
EVT_LISTBOX_DCLICK(wxID_ANY, MyFrame::OnLboxDClick)
END_EVENT_TABLE()
IMPLEMENT_APP(MyApp)
// ============================================================================
// MyFrame
// ============================================================================
// ----------------------------------------------------------------------------
// MyFrame ctor/dtor
// ----------------------------------------------------------------------------
// frame constructor
MyFrame::MyFrame()
: wxFrame(NULL, wxID_ANY, _T("HtmlLbox wxWidgets Sample"),
wxDefaultPosition, wxSize(400, 500))
{
// set the frame icon
SetIcon(wxICON(mondrian));
#if wxUSE_MENUS
// create a menu bar
wxMenu *menuFile = new wxMenu;
menuFile->Append(HtmlLbox_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
// create our specific menu
wxMenu *menuHLbox = new wxMenu;
menuHLbox->Append(HtmlLbox_SetMargins,
_T("Set &margins...\tCtrl-G"),
_T("Change the margins around the items"));
menuHLbox->AppendCheckItem(HtmlLbox_DrawSeparator,
_T("&Draw separators\tCtrl-D"),
_T("Toggle drawing separators between cells"));
menuHLbox->AppendSeparator();
menuHLbox->AppendCheckItem(HtmlLbox_ToggleMulti,
_T("&Multiple selection\tCtrl-M"),
_T("Toggle multiple selection on/off"));
menuHLbox->AppendSeparator();
menuHLbox->Append(HtmlLbox_SelectAll, _T("Select &all items\tCtrl-A"));
menuHLbox->AppendSeparator();
menuHLbox->Append(HtmlLbox_SetBgCol, _T("Set &background...\tCtrl-B"));
menuHLbox->Append(HtmlLbox_SetSelBgCol,
_T("Set &selection background...\tCtrl-S"));
menuHLbox->AppendCheckItem(HtmlLbox_SetSelFgCol,
_T("Keep &foreground in selection\tCtrl-F"));
// the "About" item should be in the help menu
wxMenu *helpMenu = new wxMenu;
helpMenu->Append(HtmlLbox_About, _T("&About...\tF1"), _T("Show about dialog"));
// now append the freshly created menu to the menu bar...
wxMenuBar *menuBar = new wxMenuBar();
menuBar->Append(menuFile, _T("&File"));
menuBar->Append(menuHLbox, _T("&Listbox"));
menuBar->Append(helpMenu, _T("&Help"));
menuBar->Check(HtmlLbox_DrawSeparator, true);
// ... and attach this menu bar to the frame
SetMenuBar(menuBar);
#endif // wxUSE_MENUS
#if wxUSE_STATUSBAR
// create a status bar just for fun (by default with 1 pane only)
CreateStatusBar(2);
SetStatusText(_T("Welcome to wxWidgets!"));
#endif // wxUSE_STATUSBAR
// create the child controls
m_hlbox = new MyHtmlListBox(this);
wxTextCtrl *text = new wxTextCtrl(this, wxID_ANY, _T(""),
wxDefaultPosition, wxDefaultSize,
wxTE_MULTILINE);
delete wxLog::SetActiveTarget(new wxLogTextCtrl(text));
// and lay them out
wxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
sizer->Add(m_hlbox, 1, wxGROW);
sizer->Add(text, 1, wxGROW);
SetSizer(sizer);
}
MyFrame::~MyFrame()
{
delete wxLog::SetActiveTarget(NULL);
}
// ----------------------------------------------------------------------------
// menu event handlers
// ----------------------------------------------------------------------------
void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
{
// true is to force the frame to close
Close(true);
}
void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
{
wxMessageBox(_T("This sample shows wxHtmlListBox class.\n")
_T("\n")
_T("<EFBFBD> 2003 Vadim Zeitlin"),
_T("About HtmlLbox"),
wxOK | wxICON_INFORMATION,
this);
}
void MyFrame::OnSetMargins(wxCommandEvent& WXUNUSED(event))
{
long margin = wxGetNumberFromUser
(
_T("Enter the margins to use for the listbox items."),
_T("Margin: "),
_T("HtmlLbox: Set the margins"),
0, 0, 20,
this
);
if ( margin != -1 )
{
m_hlbox->SetMargins(margin, margin);
m_hlbox->RefreshAll();
}
}
void MyFrame::OnToggleMulti(wxCommandEvent& event)
{
// we need to recreate the listbox
wxSizer *sizer = GetSizer();
sizer->Detach(m_hlbox);
delete m_hlbox;
m_hlbox = new MyHtmlListBox(this, event.IsChecked());
sizer->Prepend(m_hlbox, 1, wxGROW);
sizer->Layout();
}
void MyFrame::OnSelectAll(wxCommandEvent& WXUNUSED(event))
{
m_hlbox->SelectAll();
}
void MyFrame::OnUpdateUISelectAll(wxUpdateUIEvent& event)
{
event.Enable( m_hlbox && m_hlbox->HasMultipleSelection() );
}
void MyFrame::OnSetBgCol(wxCommandEvent& WXUNUSED(event))
{
wxColour col = wxGetColourFromUser(this, m_hlbox->GetBackgroundColour());
if ( col.Ok() )
{
m_hlbox->SetBackgroundColour(col);
m_hlbox->Refresh();
SetStatusText(_T("Background colour changed."));
}
}
void MyFrame::OnSetSelBgCol(wxCommandEvent& WXUNUSED(event))
{
wxColour col = wxGetColourFromUser(this, m_hlbox->GetSelectionBackground());
if ( col.Ok() )
{
m_hlbox->SetSelectionBackground(col);
m_hlbox->Refresh();
SetStatusText(_T("Selection background colour changed."));
}
}
void MyFrame::OnSetSelFgCol(wxCommandEvent& event)
{
m_hlbox->SetChangeSelFg(!event.IsChecked());
m_hlbox->Refresh();
}
// ----------------------------------------------------------------------------
// listbox event handlers
// ----------------------------------------------------------------------------
void MyFrame::OnLboxSelect(wxCommandEvent& event)
{
wxLogMessage(_T("Listbox selection is now %ld."), event.GetInt());
if ( m_hlbox->HasMultipleSelection() )
{
wxString s;
bool first = true;
unsigned long cookie;
for ( int item = m_hlbox->GetFirstSelected(cookie);
item != wxNOT_FOUND;
item = m_hlbox->GetNextSelected(cookie) )
{
if ( first )
first = false;
else
s << _T(", ");
s << item;
}
if ( !s.empty() )
wxLogMessage(_T("Selected items: %s"), s.c_str());
}
SetStatusText(wxString::Format(
_T("# items selected = %lu"),
(unsigned long)m_hlbox->GetSelectedCount()
));
}
// ============================================================================
// MyHtmlListBox
// ============================================================================
MyHtmlListBox::MyHtmlListBox(wxWindow *parent, bool multi)
: wxHtmlListBox(parent, wxID_ANY, wxDefaultPosition, wxDefaultSize,
multi ? wxLB_MULTIPLE : 0)
{
m_change = true;
SetMargins(5, 5);
#ifdef USE_HTML_FILE
if ( !m_file.Open(_T("results")) )
{
wxLogError(_T("Failed to open results file"));
}
else
{
SetItemCount(m_file.GetLineCount());
}
#else
SetItemCount(1000);
#endif
SetSelection(3);
}
void MyHtmlListBox::OnDrawSeparator(wxDC& dc, wxRect& rect, size_t) const
{
if ( ((MyFrame *)GetParent())->
GetMenuBar()->IsChecked(HtmlLbox_DrawSeparator) )
{
dc.SetPen(*wxBLACK_DASHED_PEN);
dc.DrawLine(rect.x, rect.y, rect.GetRight(), rect.y);
dc.DrawLine(rect.x, rect.GetBottom(), rect.GetRight(), rect.GetBottom());
}
}
wxString MyHtmlListBox::OnGetItem(size_t n) const
{
#ifdef USE_HTML_FILE
wxString s;
if ( m_file.IsOpened() )
s = m_file[n];
return s;
#else
int level = n % 6 + 1;
return wxString::Format(_T("<h%d><font color=#%2x%2x%2x>")
_T("Item</font> <b>%lu</b>")
_T("</h%d>"),
level,
abs(n - 192) % 256,
abs(n - 256) % 256,
abs(n - 128) % 256,
(unsigned long)n, level);
#endif
}
wxColour MyHtmlListBox::GetSelectedTextColour(const wxColour& colFg) const
{
return m_change ? wxHtmlListBox::GetSelectedTextColour(colFg) : colFg;
}