handle NULL BSTRs as empty ones per Microsoft convention

[wxWidgets.git] / src / msw / colordlg.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/colordlg.cpp
// Purpose:     wxColourDialog class
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_COLOURDLG && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))

#include "wx/colordlg.h"

#ifndef WX_PRECOMP
    #include "wx/msw/wrapcdlg.h"
    #include <stdio.h>
    #include "wx/colour.h"
    #include "wx/gdicmn.h"
    #include "wx/utils.h"
    #include "wx/dialog.h"
    #include "wx/cmndata.h"
    #include "wx/math.h"
#endif

#include "wx/msw/private.h"

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

// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------

// standard colors dialog size for the Windows systems
// this is ok if color dialog created with standart color
// and "Define Custom Colors" extension not shown
static wxRect gs_rectDialog(0, 0, 222, 324);

// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxColourDialog, wxDialog)

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// colour dialog hook proc
// ----------------------------------------------------------------------------

UINT_PTR CALLBACK
wxColourDialogHookProc(HWND hwnd,
                       UINT uiMsg,
                       WPARAM WXUNUSED(wParam),
                       LPARAM lParam)
{
    if ( uiMsg == WM_INITDIALOG )
    {
        CHOOSECOLOR *pCC = (CHOOSECOLOR *)lParam;
        wxColourDialog * const
            dialog = wx_reinterpret_cast(wxColourDialog *, pCC->lCustData);

        const wxString title = dialog->GetTitle();
        if ( !title.empty() )
            ::SetWindowText(hwnd, title.wx_str());

        dialog->MSWOnInitDone((WXHWND)hwnd);
    }

    return 0;
}

// ----------------------------------------------------------------------------
// wxColourDialog
// ----------------------------------------------------------------------------

void wxColourDialog::Init()
{
    m_movedWindow = false;
    m_centreDir = 0;

    // reset to zero, otherwise the wx routines won't size the window the
    // second time the dialog is shown, because they would believe it already
    // has the requested size/position
    gs_rectDialog.x =
    gs_rectDialog.y = 0;
}

bool wxColourDialog::Create(wxWindow *parent, wxColourData *data)
{
    m_parent = parent;
    if (data)
        m_colourData = *data;

    return true;
}

int wxColourDialog::ShowModal()
{
    CHOOSECOLOR chooseColorStruct;
    COLORREF custColours[16];
    memset(&chooseColorStruct, 0, sizeof(CHOOSECOLOR));

    int i;
    for (i = 0; i < 16; i++)
    {
        if (m_colourData.m_custColours[i].Ok())
            custColours[i] = wxColourToRGB(m_colourData.m_custColours[i]);
        else
            custColours[i] = RGB(255,255,255);
    }

    chooseColorStruct.lStructSize = sizeof(CHOOSECOLOR);
    if ( m_parent )
        chooseColorStruct.hwndOwner = GetHwndOf(m_parent);
    chooseColorStruct.rgbResult = wxColourToRGB(m_colourData.m_dataColour);
    chooseColorStruct.lpCustColors = custColours;

    chooseColorStruct.Flags = CC_RGBINIT | CC_ENABLEHOOK;
    chooseColorStruct.lCustData = (LPARAM)this;
    chooseColorStruct.lpfnHook = wxColourDialogHookProc;

    if (m_colourData.GetChooseFull())
        chooseColorStruct.Flags |= CC_FULLOPEN;

    // Do the modal dialog
    bool success = ::ChooseColor(&(chooseColorStruct)) != 0;

    // Try to highlight the correct window (the parent)
    if (GetParent())
    {
      HWND hWndParent = (HWND) GetParent()->GetHWND();
      if (hWndParent)
        ::BringWindowToTop(hWndParent);
    }


    // Restore values
    for (i = 0; i < 16; i++)
    {
      wxRGBToColour(m_colourData.m_custColours[i], custColours[i]);
    }

    wxRGBToColour(m_colourData.m_dataColour, chooseColorStruct.rgbResult);

    return success ? wxID_OK : wxID_CANCEL;
}

// ----------------------------------------------------------------------------
// title
// ----------------------------------------------------------------------------

void wxColourDialog::SetTitle(const wxString& title)
{
    m_title = title;
}

wxString wxColourDialog::GetTitle() const
{
    return m_title;
}

// ----------------------------------------------------------------------------
// position/size
// ----------------------------------------------------------------------------

void wxColourDialog::DoGetPosition(int *x, int *y) const
{
    if ( x )
        *x = gs_rectDialog.x;
    if ( y )
        *y = gs_rectDialog.y;
}

void wxColourDialog::DoCentre(int dir)
{
    m_centreDir = dir;

    // it's unnecessary to do anything else at this stage as we'll redo it in
    // MSWOnInitDone() anyhow
}

void wxColourDialog::DoMoveWindow(int x, int y, int WXUNUSED(w), int WXUNUSED(h))
{
    gs_rectDialog.x = x;
    gs_rectDialog.y = y;

    // our HWND is only set when we're called from MSWOnInitDone(), test if
    // this is the case
    HWND hwnd = GetHwnd();
    if ( hwnd )
    {
        // size of the dialog can't be changed because the controls are not
        // laid out correctly then
       ::SetWindowPos(hwnd, HWND_TOP, x, y, 0, 0, SWP_NOZORDER | SWP_NOSIZE);
    }
    else // just remember that we were requested to move the window
    {
        m_movedWindow = true;

        // if Centre() had been called before, it shouldn't be taken into
        // account now
        m_centreDir = 0;
    }
}

void wxColourDialog::DoGetSize(int *width, int *height) const
{
    if ( width )
        *width = gs_rectDialog.width;
    if ( height )
        *height = gs_rectDialog.height;
}

void wxColourDialog::DoGetClientSize(int *width, int *height) const
{
    if ( width )
        *width = gs_rectDialog.width;
    if ( height )
        *height = gs_rectDialog.height;
}

void wxColourDialog::MSWOnInitDone(WXHWND hDlg)
{
    // set HWND so that our DoMoveWindow() works correctly
    SetHWND(hDlg);

    if ( m_centreDir )
    {
        // now we have the real dialog size, remember it
        RECT rect;
        ::GetWindowRect((HWND)hDlg, &rect);
        gs_rectDialog = wxRectFromRECT(rect);

        // and position the window correctly: notice that we must use the base
        // class version as our own doesn't do anything except setting flags
        wxDialog::DoCentre(m_centreDir);
    }
    else if ( m_movedWindow ) // need to just move it to the correct place
    {
        SetPosition(GetPosition());
    }

    // we shouldn't destroy hDlg, so disassociate from it
    SetHWND(NULL);
}

#endif // wxUSE_COLOURDLG && !(__SMARTPHONE__ && __WXWINCE__)