wxWidgets/src/msw/colordlg.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/colordlg.cpp
// Purpose:     wxColourDialog class
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// 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

#include "wx/colordlg.h"
#include "wx/modalhook.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/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
// ----------------------------------------------------------------------------

wxIMPLEMENT_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 = reinterpret_cast<wxColourDialog *>(pCC->lCustData);

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

    wxWindow* const parent = GetParentForModalDialog(m_parent, GetWindowStyle());
    WXHWND hWndParent = parent ? GetHwndOf(parent) : NULL;

    // initialize the struct used by Windows
    CHOOSECOLOR chooseColorStruct;
    memset(&chooseColorStruct, 0, sizeof(CHOOSECOLOR));

    size_t i;

    // and transfer data from m_colourData to it
    COLORREF custColours[16];
    for ( i = 0; i < WXSIZEOF(custColours); i++ )
    {
        if ( m_colourData.GetCustomColour(i).IsOk() )
            custColours[i] = wxColourToRGB(m_colourData.GetCustomColour(i));
        else
            custColours[i] = RGB(255,255,255);
    }

    chooseColorStruct.lStructSize = sizeof(CHOOSECOLOR);
    chooseColorStruct.hwndOwner = hWndParent;
    chooseColorStruct.rgbResult = wxColourToRGB(m_colourData.GetColour());
    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 show the modal dialog
    if ( !::ChooseColor(&chooseColorStruct) )
    {
        // 0 error means the dialog was simply cancelled, i.e. no real error
        // occurred
        const DWORD err = CommDlgExtendedError();
        if ( err )
        {
            wxLogError(_("Colour selection dialog failed with error %0lx."), err);
        }

        return wxID_CANCEL;
    }


    // transfer the values chosen by user back into m_colourData
    for ( i = 0; i < WXSIZEOF(custColours); i++ )
    {
      wxRGBToColour(m_colourData.m_custColours[i], custColours[i]);
    }

    wxRGBToColour(m_colourData.GetColour(), chooseColorStruct.rgbResult);

    // this doesn't seem to work (contrary to what MSDN implies) on current
    // Windows versions: CC_FULLOPEN is never set on return if it wasn't
    // initially set and vice versa
    //m_colourData.SetChooseFull((chooseColorStruct.Flags & CC_FULLOPEN) != 0);

    return wxID_OK;
}

// ----------------------------------------------------------------------------
// 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