check for NULL pointer in OnMeasureItem() as well as in OnDrawItem()

[wxWidgets.git] / src / generic / fontdlgg.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/generic/fontdlgg.cpp
// Purpose:     Generic font dialog
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "fontdlgg.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#if wxUSE_FONTDLG && (!defined(__WXGTK__) || defined(__WXGPE__) || defined(__WXUNIVERSAL__))

#ifndef WX_PRECOMP
    #include <stdio.h>
    #include "wx/utils.h"
    #include "wx/dialog.h"
    #include "wx/listbox.h"
    #include "wx/button.h"
    #include "wx/stattext.h"
    #include "wx/layout.h"
    #include "wx/dcclient.h"
    #include "wx/choice.h"
    #include "wx/checkbox.h"
    #include "wx/intl.h"
#endif

#include <string.h>
#include <stdlib.h>

#include "wx/cmndata.h"
#include "wx/sizer.h"
#include "wx/fontdlg.h"
#include "wx/generic/fontdlgg.h"
#include "wx/settings.h"

//-----------------------------------------------------------------------------
// helper class - wxFontPreviewer
//-----------------------------------------------------------------------------

class WXDLLEXPORT wxFontPreviewer : public wxWindow
{
public:
    wxFontPreviewer(wxWindow *parent, const wxSize& sz = wxDefaultSize) : wxWindow(parent, wxID_ANY, wxDefaultPosition, sz)
    {
    }

private:
    void OnPaint(wxPaintEvent& event);
    DECLARE_EVENT_TABLE()
};

BEGIN_EVENT_TABLE(wxFontPreviewer, wxWindow)
    EVT_PAINT(wxFontPreviewer::OnPaint)
END_EVENT_TABLE()

void wxFontPreviewer::OnPaint(wxPaintEvent& WXUNUSED(event))
{
    wxPaintDC dc(this);

    wxSize size = GetSize();
    wxFont font = GetFont();

    dc.SetPen(*wxBLACK_PEN);
    dc.SetBrush(*wxWHITE_BRUSH);
    dc.DrawRectangle(0, 0, size.x, size.y);

    if ( font.Ok() )
    {
        dc.SetFont(font);
        // Calculate vertical centre
        long w, h;
        dc.GetTextExtent( wxT("X"), &w, &h);
        dc.SetTextForeground(GetForegroundColour());
        dc.SetClippingRegion(2, 2, size.x-4, size.y-4);
        dc.DrawText(_("ABCDEFGabcdefg12345"),
                     10, size.y/2 - h/2);
        dc.DestroyClippingRegion();
    }
}

//-----------------------------------------------------------------------------
// wxGenericFontDialog
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxGenericFontDialog, wxDialog)

BEGIN_EVENT_TABLE(wxGenericFontDialog, wxDialog)
    EVT_CHECKBOX(wxID_FONT_UNDERLINE, wxGenericFontDialog::OnChangeFont)
    EVT_CHOICE(wxID_FONT_STYLE, wxGenericFontDialog::OnChangeFont)
    EVT_CHOICE(wxID_FONT_WEIGHT, wxGenericFontDialog::OnChangeFont)
    EVT_CHOICE(wxID_FONT_FAMILY, wxGenericFontDialog::OnChangeFont)
    EVT_CHOICE(wxID_FONT_COLOUR, wxGenericFontDialog::OnChangeFont)
    EVT_CHOICE(wxID_FONT_SIZE, wxGenericFontDialog::OnChangeFont)
    EVT_CLOSE(wxGenericFontDialog::OnCloseWindow)
END_EVENT_TABLE()


#define NUM_COLS 48
static wxString wxColourDialogNames[NUM_COLS]={wxT("ORANGE"),
                    wxT("GOLDENROD"),
                    wxT("WHEAT"),
                    wxT("SPRING GREEN"),
                    wxT("SKY BLUE"),
                    wxT("SLATE BLUE"),
                    wxT("MEDIUM VIOLET RED"),
                    wxT("PURPLE"),

                    wxT("RED"),
                    wxT("YELLOW"),
                    wxT("MEDIUM SPRING GREEN"),
                    wxT("PALE GREEN"),
                    wxT("CYAN"),
                    wxT("LIGHT STEEL BLUE"),
                    wxT("ORCHID"),
                    wxT("LIGHT MAGENTA"),

                    wxT("BROWN"),
                    wxT("YELLOW"),
                    wxT("GREEN"),
                    wxT("CADET BLUE"),
                    wxT("MEDIUM BLUE"),
                    wxT("MAGENTA"),
                    wxT("MAROON"),
                    wxT("ORANGE RED"),

                    wxT("FIREBRICK"),
                    wxT("CORAL"),
                    wxT("FOREST GREEN"),
                    wxT("AQUARAMINE"),
                    wxT("BLUE"),
                    wxT("NAVY"),
                    wxT("THISTLE"),
                    wxT("MEDIUM VIOLET RED"),

                    wxT("INDIAN RED"),
                    wxT("GOLD"),
                    wxT("MEDIUM SEA GREEN"),
                    wxT("MEDIUM BLUE"),
                    wxT("MIDNIGHT BLUE"),
                    wxT("GREY"),
                    wxT("PURPLE"),
                    wxT("KHAKI"),

                    wxT("BLACK"),
                    wxT("MEDIUM FOREST GREEN"),
                    wxT("KHAKI"),
                    wxT("DARK GREY"),
                    wxT("SEA GREEN"),
                    wxT("LIGHT GREY"),
                    wxT("MEDIUM SLATE BLUE"),
                    wxT("WHITE")
                    };

/*
 * Generic wxFontDialog
 */

void wxGenericFontDialog::Init()
{
  m_useEvents = false;
  m_previewer = NULL;
  Create( m_parent ) ;
}

wxGenericFontDialog::~wxGenericFontDialog()
{
}

void wxGenericFontDialog::OnCloseWindow(wxCloseEvent& WXUNUSED(event))
{
    EndModal(wxID_CANCEL);
}

bool wxGenericFontDialog::DoCreate(wxWindow *parent)
{
    if ( !wxDialog::Create( parent , wxID_ANY , _T("Choose Font") , wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE,
        _T("fontdialog") ) )
    {
        wxFAIL_MSG( wxT("wxFontDialog creation failed") );
        return false;
    }

    InitializeFont();
    CreateWidgets();

    // sets initial font in preview area
    wxCommandEvent dummy;
    OnChangeFont(dummy);

    return true;
}

int wxGenericFontDialog::ShowModal()
{
    int ret = wxDialog::ShowModal();

    if (ret != wxID_CANCEL)
    {
      m_fontData.m_chosenFont = dialogFont;
    }

    return ret;
}

// This should be application-settable
static bool ShowToolTips() { return false; }

void wxGenericFontDialog::CreateWidgets()
{
    wxString
     *families = new wxString[6],
     *styles = new wxString[3],
     *weights = new wxString[3];
    families[0] =  _("Roman");
    families[1] = _("Decorative");
    families[2] = _("Modern");
    families[3] = _("Script");
    families[4] = _("Swiss" );
    families[5] = _("Teletype" );
    styles[0] = _("Normal");
    styles[1] = _("Italic");
    styles[2] = _("Slant");
    weights[0] = _("Normal");
    weights[1] = _("Light");
    weights[2] = _("Bold");

    wxString *pointSizes = new wxString[40];
    int i;
    for ( i = 0; i < 40; i++)
    {
        wxChar buf[5];
        wxSprintf(buf, wxT("%d"), i + 1);
        pointSizes[i] = buf;
    }

    // layout

    bool is_pda = (wxSystemSettings::GetScreenType() <= wxSYS_SCREEN_PDA);
    int noCols, noRows;
    if (is_pda)
    {
        noCols = 2; noRows = 3;
    }
    else
    {
        noCols = 3; noRows = 2;
    }

    wxBoxSizer* itemBoxSizer2 = new wxBoxSizer(wxVERTICAL);
    this->SetSizer(itemBoxSizer2);
    this->SetAutoLayout(TRUE);
    
    wxBoxSizer* itemBoxSizer3 = new wxBoxSizer(wxVERTICAL);
    itemBoxSizer2->Add(itemBoxSizer3, 1, wxGROW|wxALL, 5);

    wxFlexGridSizer* itemGridSizer4 = new wxFlexGridSizer(noRows, noCols, 0, 0);
    itemBoxSizer3->Add(itemGridSizer4, 0, wxGROW, 5);

    wxBoxSizer* itemBoxSizer5 = new wxBoxSizer(wxVERTICAL);
    itemGridSizer4->Add(itemBoxSizer5, 0, wxALIGN_CENTER_HORIZONTAL|wxGROW, 5);
    wxStaticText* itemStaticText6 = new wxStaticText( this, wxID_STATIC, _("&Font family:"), wxDefaultPosition, wxDefaultSize, 0 );
    itemBoxSizer5->Add(itemStaticText6, 0, wxALIGN_LEFT|wxLEFT|wxRIGHT|wxTOP|wxADJUST_MINSIZE, 5);

    wxChoice* itemChoice7 = new wxChoice( this, wxID_FONT_FAMILY, wxDefaultPosition, wxDefaultSize, 5, families, 0 );
    itemChoice7->SetHelpText(_("The font family."));
    if (ShowToolTips())
        itemChoice7->SetToolTip(_("The font family."));
    itemBoxSizer5->Add(itemChoice7, 0, wxALIGN_LEFT|wxALL, 5);

    wxBoxSizer* itemBoxSizer8 = new wxBoxSizer(wxVERTICAL);
    itemGridSizer4->Add(itemBoxSizer8, 0, wxALIGN_CENTER_HORIZONTAL|wxGROW, 5);
    wxStaticText* itemStaticText9 = new wxStaticText( this, wxID_STATIC, _("&Style:"), wxDefaultPosition, wxDefaultSize, 0 );
    itemBoxSizer8->Add(itemStaticText9, 0, wxALIGN_LEFT|wxLEFT|wxRIGHT|wxTOP|wxADJUST_MINSIZE, 5);

    wxChoice* itemChoice10 = new wxChoice( this, wxID_FONT_STYLE, wxDefaultPosition, wxDefaultSize, 3, styles, 0 );
    itemChoice10->SetHelpText(_("The font style."));
    if (ShowToolTips())
        itemChoice10->SetToolTip(_("The font style."));
    itemBoxSizer8->Add(itemChoice10, 0, wxALIGN_LEFT|wxALL, 5);

    wxBoxSizer* itemBoxSizer11 = new wxBoxSizer(wxVERTICAL);
    itemGridSizer4->Add(itemBoxSizer11, 0, wxALIGN_CENTER_HORIZONTAL|wxGROW, 5);
    wxStaticText* itemStaticText12 = new wxStaticText( this, wxID_STATIC, _("&Weight:"), wxDefaultPosition, wxDefaultSize, 0 );
    itemBoxSizer11->Add(itemStaticText12, 0, wxALIGN_LEFT|wxLEFT|wxRIGHT|wxTOP|wxADJUST_MINSIZE, 5);

    wxChoice* itemChoice13 = new wxChoice( this, wxID_FONT_WEIGHT, wxDefaultPosition, wxDefaultSize, 3, weights, 0 );
    itemChoice13->SetHelpText(_("The font weight."));
    if (ShowToolTips())
        itemChoice13->SetToolTip(_("The font weight."));
    itemBoxSizer11->Add(itemChoice13, 0, wxALIGN_LEFT|wxALL, 5);

    wxBoxSizer* itemBoxSizer14 = new wxBoxSizer(wxVERTICAL);
    itemGridSizer4->Add(itemBoxSizer14, 0, wxALIGN_CENTER_HORIZONTAL|wxGROW, 5);
    if (m_fontData.GetEnableEffects())
    {
        wxStaticText* itemStaticText15 = new wxStaticText( this, wxID_STATIC, _("C&olour:"), wxDefaultPosition, wxDefaultSize, 0 );
        itemBoxSizer14->Add(itemStaticText15, 0, wxALIGN_LEFT|wxLEFT|wxRIGHT|wxTOP|wxADJUST_MINSIZE, 5);
        
        wxSize colourSize = wxDefaultSize;
        if (is_pda)
            colourSize.x = 100;

        wxChoice* itemChoice16 = new wxChoice( this, wxID_FONT_COLOUR, wxDefaultPosition, wxDefaultSize, NUM_COLS, wxColourDialogNames, 0 );
        itemChoice16->SetHelpText(_("The font colour."));
        if (ShowToolTips())
            itemChoice16->SetToolTip(_("The font colour."));
        itemBoxSizer14->Add(itemChoice16, 0, wxALIGN_LEFT|wxALL, 5);
    }

    wxBoxSizer* itemBoxSizer17 = new wxBoxSizer(wxVERTICAL);
    itemGridSizer4->Add(itemBoxSizer17, 0, wxALIGN_CENTER_HORIZONTAL|wxGROW, 5);
    wxStaticText* itemStaticText18 = new wxStaticText( this, wxID_STATIC, _("&Point size:"), wxDefaultPosition, wxDefaultSize, 0 );
    itemBoxSizer17->Add(itemStaticText18, 0, wxALIGN_LEFT|wxLEFT|wxRIGHT|wxTOP|wxADJUST_MINSIZE, 5);

    wxChoice* itemChoice19 = new wxChoice( this, wxID_FONT_SIZE, wxDefaultPosition, wxDefaultSize, 40, pointSizes, 0 );
    itemChoice19->SetHelpText(_("The font point size."));
    if (ShowToolTips())
        itemChoice19->SetToolTip(_("The font point size."));
    itemBoxSizer17->Add(itemChoice19, 0, wxALIGN_LEFT|wxALL, 5);

    if (m_fontData.GetEnableEffects())
    {
        wxBoxSizer* itemBoxSizer20 = new wxBoxSizer(wxVERTICAL);
        itemGridSizer4->Add(itemBoxSizer20, 0, wxALIGN_LEFT|wxALIGN_CENTER_VERTICAL, 5);
        wxCheckBox* itemCheckBox21 = new wxCheckBox( this, wxID_FONT_UNDERLINE, _("&Underline"), wxDefaultPosition, wxDefaultSize, 0 );
        itemCheckBox21->SetValue(FALSE);
        itemCheckBox21->SetHelpText(_("Whether the font is underlined."));
        if (ShowToolTips())
            itemCheckBox21->SetToolTip(_("Whether the font is underlined."));
        itemBoxSizer20->Add(itemCheckBox21, 0, wxALIGN_LEFT|wxALL, 5);
    }

    if (!is_pda)
        itemBoxSizer3->Add(5, 5, 0, wxALIGN_CENTER_HORIZONTAL|wxALL, 5);

    wxStaticText* itemStaticText23 = new wxStaticText( this, wxID_STATIC, _("Preview:"), wxDefaultPosition, wxDefaultSize, 0 );
    itemBoxSizer3->Add(itemStaticText23, 0, wxALIGN_LEFT|wxLEFT|wxRIGHT|wxTOP|wxADJUST_MINSIZE, 5);
    
    wxFontPreviewer* itemWindow24 = new wxFontPreviewer( this );
    m_previewer = itemWindow24;
    itemWindow24->SetHelpText(_("Shows the font preview."));
    if (ShowToolTips())
        itemWindow24->SetToolTip(_("Shows the font preview."));
    itemBoxSizer3->Add(itemWindow24, 0, wxGROW|wxALL, 5);

    wxBoxSizer* itemBoxSizer25 = new wxBoxSizer(wxHORIZONTAL);
    itemBoxSizer3->Add(itemBoxSizer25, 0, wxGROW, 5);
    itemBoxSizer25->Add(5, 5, 1, wxGROW|wxALL, 5);

#ifdef __WXMAC__
    wxButton* itemButton28 = new wxButton( this, wxID_CANCEL, _("&Cancel"), wxDefaultPosition, wxDefaultSize, 0 );
    if (ShowToolTips())
        itemButton28->SetToolTip(_("Click to cancel the font selection."));
    itemBoxSizer25->Add(itemButton28, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);

    wxButton* itemButton27 = new wxButton( this, wxID_OK, _("&OK"), wxDefaultPosition, wxDefaultSize, 0 );
    itemButton27->SetDefault();
    itemButton27->SetHelpText(_("Click to confirm the font selection."));
    if (ShowToolTips())
        itemButton27->SetToolTip(_("Click to confirm the font selection."));
    itemBoxSizer25->Add(itemButton27, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);
#else
    wxButton* itemButton27 = new wxButton( this, wxID_OK, _("&OK"), wxDefaultPosition, wxDefaultSize, 0 );
    itemButton27->SetDefault();
    itemButton27->SetHelpText(_("Click to confirm the font selection."));
    if (ShowToolTips())
        itemButton27->SetToolTip(_("Click to confirm the font selection."));
    itemBoxSizer25->Add(itemButton27, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);

    wxButton* itemButton28 = new wxButton( this, wxID_CANCEL, _("&Cancel"), wxDefaultPosition, wxDefaultSize, 0 );
    if (ShowToolTips())
        itemButton28->SetToolTip(_("Click to cancel the font selection."));
    itemBoxSizer25->Add(itemButton28, 0, wxALIGN_CENTER_VERTICAL|wxALL, 5);
#endif

    familyChoice = (wxChoice*) FindWindow(wxID_FONT_FAMILY);
    styleChoice = (wxChoice*) FindWindow(wxID_FONT_STYLE);
    weightChoice = (wxChoice*) FindWindow(wxID_FONT_WEIGHT);
    colourChoice = (wxChoice*) FindWindow(wxID_FONT_COLOUR);
    pointSizeChoice = (wxChoice*) FindWindow(wxID_FONT_SIZE);
    underLineCheckBox = (wxCheckBox*) FindWindow(wxID_FONT_UNDERLINE);
    
    familyChoice->SetStringSelection( wxFontFamilyIntToString(dialogFont.GetFamily()) );
    styleChoice->SetStringSelection(wxFontStyleIntToString(dialogFont.GetStyle()));
    weightChoice->SetStringSelection(wxFontWeightIntToString(dialogFont.GetWeight()));

    if (colourChoice)
    {
        wxString name(wxTheColourDatabase->FindName(m_fontData.GetColour()));
        if (name.length())
            colourChoice->SetStringSelection(name);
        else
            colourChoice->SetStringSelection(wxT("BLACK"));
    }
    
    if (underLineCheckBox)
    {
        underLineCheckBox->SetValue(dialogFont.GetUnderlined());
    }

    pointSizeChoice->SetSelection(dialogFont.GetPointSize()-1);

#if !defined(__SMARTPHONE__) && !defined(__POCKETPC__)
    GetSizer()->SetItemMinSize(m_previewer, is_pda ? 100 : 430, is_pda ? 40 : 100);
    GetSizer()->SetSizeHints(this);
    GetSizer()->Fit(this);    

    Centre(wxBOTH);
#endif

    delete[] families;
    delete[] styles;
    delete[] weights;
    delete[] pointSizes;

    // Don't block events any more
    m_useEvents = true;

}

void wxGenericFontDialog::InitializeFont()
{
    int fontFamily = wxSWISS;
    int fontWeight = wxNORMAL;
    int fontStyle = wxNORMAL;
    int fontSize = 12;
    bool fontUnderline = false;

    if (m_fontData.m_initialFont.Ok())
    {
        fontFamily = m_fontData.m_initialFont.GetFamily();
        fontWeight = m_fontData.m_initialFont.GetWeight();
        fontStyle = m_fontData.m_initialFont.GetStyle();
        fontSize = m_fontData.m_initialFont.GetPointSize();
        fontUnderline = m_fontData.m_initialFont.GetUnderlined();
    }

    dialogFont = wxFont(fontSize, fontFamily, fontStyle,
        fontWeight, fontUnderline);

    if (m_previewer)
        m_previewer->SetFont(dialogFont);
}

void wxGenericFontDialog::OnChangeFont(wxCommandEvent& WXUNUSED(event))
{
    if (!m_useEvents) return;

    int fontFamily = wxFontFamilyStringToInt(WXSTRINGCAST familyChoice->GetStringSelection());
    int fontWeight = wxFontWeightStringToInt(WXSTRINGCAST weightChoice->GetStringSelection());
    int fontStyle = wxFontStyleStringToInt(WXSTRINGCAST styleChoice->GetStringSelection());
    int fontSize = wxAtoi(pointSizeChoice->GetStringSelection());
    // Start with previous underline setting, we want to retain it even if we can't edit it
    // dialogFont is always initialized because of the call to InitializeFont
    int fontUnderline = dialogFont.GetUnderlined();

    if (underLineCheckBox)
    {
        fontUnderline = underLineCheckBox->GetValue();
    }

    dialogFont = wxFont(fontSize, fontFamily, fontStyle, fontWeight, (fontUnderline != 0));
    m_previewer->SetFont(dialogFont);

    if ( colourChoice )
    {
        if ( !colourChoice->GetStringSelection().empty() )
        {
            wxColour col = wxTheColourDatabase->Find(colourChoice->GetStringSelection());
            if (col.Ok())
            {
                m_fontData.m_fontColour = col;
            }
        }
    }
    // Update color here so that we can also use the color originally passed in
    // (EnableEffects may be false)
    if (m_fontData.m_fontColour.Ok())
        m_previewer->SetForegroundColour(m_fontData.m_fontColour);
        
    m_previewer->Refresh();
}

const wxChar *wxFontWeightIntToString(int weight)
{
  switch (weight)
  {
    case wxLIGHT:
      return wxT("Light");
    case wxBOLD:
      return wxT("Bold");
    case wxNORMAL:
    default:
      return wxT("Normal");
  }
}

const wxChar *wxFontStyleIntToString(int style)
{
  switch (style)
  {
    case wxITALIC:
      return wxT("Italic");
    case wxSLANT:
      return wxT("Slant");
    case wxNORMAL:
    default:
      return wxT("Normal");
  }
}

const wxChar *wxFontFamilyIntToString(int family)
{
  switch (family)
  {
    case wxROMAN:
      return wxT("Roman");
    case wxDECORATIVE:
      return wxT("Decorative");
    case wxMODERN:
      return wxT("Modern");
    case wxSCRIPT:
      return wxT("Script");
    case wxTELETYPE:
      return wxT("Teletype");
    case wxSWISS:
    default:
      return wxT("Swiss");
  }
}

int wxFontFamilyStringToInt(wxChar *family)
{
  if (!family)
    return wxSWISS;

  if (wxStrcmp(family, wxT("Roman")) == 0)
    return wxROMAN;
  else if (wxStrcmp(family, wxT("Decorative")) == 0)
    return wxDECORATIVE;
  else if (wxStrcmp(family, wxT("Modern")) == 0)
    return wxMODERN;
  else if (wxStrcmp(family, wxT("Script")) == 0)
    return wxSCRIPT;
  else if (wxStrcmp(family, wxT("Teletype")) == 0)
    return wxTELETYPE;
  else return wxSWISS;
}

int wxFontStyleStringToInt(wxChar *style)
{
  if (!style)
    return wxNORMAL;
  if (wxStrcmp(style, wxT("Italic")) == 0)
    return wxITALIC;
  else if (wxStrcmp(style, wxT("Slant")) == 0)
    return wxSLANT;
  else
    return wxNORMAL;
}

int wxFontWeightStringToInt(wxChar *weight)
{
  if (!weight)
    return wxNORMAL;
  if (wxStrcmp(weight, wxT("Bold")) == 0)
    return wxBOLD;
  else if (wxStrcmp(weight, wxT("Light")) == 0)
    return wxLIGHT;
  else
    return wxNORMAL;
}

#endif
    // wxUSE_FONTDLG