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2b5f62a0b2db198609b45dec622a018dae37008e
wxWidgets/src/msw/ownerdrw.cpp
Vadim Zeitlin 2b5f62a0b2 merged 2.4 branch into the trunk 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2002-12-04 14:11:26 +00:00

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///////////////////////////////////////////////////////////////////////////////
// Name: msw/ownerdrw.cpp
// Purpose: implementation of wxOwnerDrawn class
// Author: Vadim Zeitlin
// Modified by:
// Created: 13.11.97
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows license
///////////////////////////////////////////////////////////////////////////////
#ifdef __GNUG__
#pragma implementation
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#include "wx/msw/private.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#ifndef WX_PRECOMP
#include "wx/window.h"
#include "wx/msw/private.h"
#include "wx/font.h"
#include "wx/bitmap.h"
#include "wx/dcmemory.h"
#include "wx/menu.h"
#include "wx/utils.h"
#endif
#include "wx/settings.h"
#include "wx/ownerdrw.h"
#include "wx/menuitem.h"
#include "wx/fontutil.h"
#if wxUSE_OWNER_DRAWN
// ============================================================================
// implementation of wxOwnerDrawn class
// ============================================================================
// ctor
// ----
wxOwnerDrawn::wxOwnerDrawn(const wxString& str,
bool bCheckable, bool WXUNUSED(bMenuItem))
: m_strName(str)
{
#if defined(__WXMSW__) && defined(__WIN32__) && defined(SM_CXMENUCHECK)
// get the default menu height and font from the system
NONCLIENTMETRICS nm;
nm.cbSize = sizeof (NONCLIENTMETRICS);
SystemParametersInfo (SPI_GETNONCLIENTMETRICS,0,&nm,0);
m_nMinHeight = nm.iMenuHeight;
// nm.iMenuWidth is the system default for the width of
// menu icons and checkmarks
if (ms_nDefaultMarginWidth == 0)
{
ms_nDefaultMarginWidth = nm.iMenuWidth;
ms_nLastMarginWidth = nm.iMenuWidth;
}
wxNativeFontInfo info;
memcpy(&info.lf, &nm.lfMenuFont, sizeof(LOGFONT));
m_font.Create(info);
#else
// windows clean install default
m_nMinHeight = 18;
if (ms_nDefaultMarginWidth == 0)
{
ms_nDefaultMarginWidth = 18;
ms_nLastMarginWidth = 18;
}
if (wxNORMAL_FONT)
m_font = *wxNORMAL_FONT;
#endif
m_bCheckable = bCheckable;
m_bOwnerDrawn = FALSE;
m_nHeight = 0;
m_nMarginWidth = ms_nLastMarginWidth;
}
// these items will be set during the first invocation of the c'tor,
// because the values will be determined by checking the system settings,
// which is a chunk of code
size_t wxOwnerDrawn::ms_nDefaultMarginWidth = 0;
size_t wxOwnerDrawn::ms_nLastMarginWidth = 0;
// drawing
// -------
// get size of the item
bool wxOwnerDrawn::OnMeasureItem(size_t *pwidth, size_t *pheight)
{
wxMemoryDC dc;
wxString str = wxStripMenuCodes(m_strName);
// # without this menu items look too tightly packed (at least under Windows)
str += wxT('W'); // 'W' is typically the widest letter
if (m_font.Ok())
dc.SetFont(GetFont());
dc.GetTextExtent(str, (long *)pwidth, (long *)pheight);
if (!m_strAccel.IsEmpty())
{
// measure the accelerator string, and add it's width to
// the total item width, plus 16 (Accelerators are right justified,
// with the right edge of the text rectangle 16 pixels left of
// the right edge of the menu)
int accel_width, accel_height;
dc.GetTextExtent(m_strAccel, &accel_width, &accel_height);
*pwidth += (accel_width + 16);
}
// JACS: items still look too tightly packed, so adding 5 pixels.
(*pheight) = (*pheight) + 5;
// Ray Gilbert's changes - Corrects the problem of a BMP
// being placed next to text in a menu item, and the BMP does
// not match the size expected by the system. This will
// resize the space so the BMP will fit. Without this, BMPs
// must be no larger or smaller than 16x16.
if (m_bmpChecked.Ok())
{
// Is BMP height larger then text height?
size_t adjustedHeight = m_bmpChecked.GetHeight() +
wxSystemSettings::GetMetric(wxSYS_EDGE_Y);
if (*pheight < adjustedHeight)
*pheight = adjustedHeight;
// Does BMP encroach on default check menu position?
size_t adjustedWidth = m_bmpChecked.GetWidth() +
(wxSystemSettings::GetMetric(wxSYS_EDGE_X) * 2);
if (ms_nDefaultMarginWidth < adjustedWidth)
*pwidth += adjustedWidth - ms_nDefaultMarginWidth;
// Do we need to widen margin to fit BMP?
if ((size_t)GetMarginWidth() < adjustedWidth)
SetMarginWidth(adjustedWidth);
}
// make sure that this item is at least as
// tall as the user's system settings specify
if (*pheight < m_nMinHeight)
*pheight = m_nMinHeight;
m_nHeight = *pheight; // remember height for use in OnDrawItem
return TRUE;
}
// searching for this macro you'll find all the code where I'm using the native
// Win32 GDI functions and not wxWindows ones. Might help to whoever decides to
// port this code to X. (VZ)
// JACS: TODO. Why does a disabled but highlighted item still
// get drawn embossed? How can we tell DrawState that we don't want the
// embossing?
#if defined(__WIN32__) && !defined(__SC__) && !defined(__TWIN32__)
#define O_DRAW_NATIVE_API // comments below explain why I use it
#endif
// draw the item
bool wxOwnerDrawn::OnDrawItem(wxDC& dc,
const wxRect& rc,
wxODAction act,
wxODStatus st)
{
// we do nothing on focus change
if ( act == wxODFocusChanged )
return TRUE;
// wxColor <-> RGB
#define ToRGB(col) PALETTERGB(col.Red(), col.Green(), col.Blue())
#define UnRGB(col) GetRValue(col), GetGValue(col), GetBValue(col)
// set the colors
// --------------
DWORD colBack, colText;
if ( st & wxODSelected ) {
colBack = GetSysColor(COLOR_HIGHLIGHT);
if (!(st & wxODDisabled))
{
colText = GetSysColor(COLOR_HIGHLIGHTTEXT);
}
else
{
colText = GetSysColor(COLOR_GRAYTEXT);
}
}
else {
// fall back to default colors if none explicitly specified
colBack = m_colBack.Ok() ? ToRGB(m_colBack) : GetSysColor(COLOR_WINDOW);
colText = m_colText.Ok() ? ToRGB(m_colText) : GetSysColor(COLOR_WINDOWTEXT);
}
#ifdef O_DRAW_NATIVE_API
#define hdc (HDC)dc.GetHDC()
COLORREF colOldText = ::SetTextColor(hdc, colText),
colOldBack = ::SetBkColor(hdc, colBack);
#else
dc.SetTextForeground(wxColor(UnRGB(colText)));
dc.SetTextBackground(wxColor(UnRGB(colBack)));
#endif
// select the font and draw the text
// ---------------------------------
// determine where to draw and leave space for a check-mark.
// Add 3 pixel padding so text appears well within highlight rectangle
int x = rc.x + GetMarginWidth() + 3;
// using native API because it reckognizes '&'
#ifdef O_DRAW_NATIVE_API
int nPrevMode = SetBkMode(hdc, TRANSPARENT);
HBRUSH hbr = CreateSolidBrush(colBack),
hPrevBrush = (HBRUSH)SelectObject(hdc, hbr);
RECT rectFill = { rc.GetLeft(), rc.GetTop(), rc.GetRight()+1, rc.GetBottom() };
if ( st & wxODSelected && m_bmpChecked.Ok()) {
// only draw the highlight under the text, not under
// the bitmap or checkmark; leave a 1-pixel gap.
rectFill.left = GetMarginWidth() + 1;
}
FillRect(hdc, &rectFill, hbr);
// use default font if no font set
HFONT hfont;
if ( m_font.Ok() ) {
m_font.RealizeResource();
hfont = (HFONT)m_font.GetResourceHandle();
}
else {
hfont = (HFONT)::GetStockObject(SYSTEM_FONT);
}
HFONT hPrevFont = (HFONT) ::SelectObject(hdc, hfont);
wxString strMenuText = m_strName.BeforeFirst('\t');
::DrawState(hdc, NULL, NULL,
(LPARAM)strMenuText.c_str(), strMenuText.length(),
x, rc.y + 1, rc.GetWidth(), rc.GetHeight(),
DST_PREFIXTEXT |
(((st & wxODDisabled) && !(st & wxODSelected)) ? DSS_DISABLED : 0));
if ( !m_strAccel.empty() )
{
int accel_width, accel_height;
dc.GetTextExtent(m_strAccel, &accel_width, &accel_height);
::DrawState(hdc, NULL, NULL,
(LPARAM)m_strAccel.c_str(), m_strAccel.length(),
rc.GetRight() - accel_width - 16, rc.y + 1, 0, 0,
DST_TEXT |
(((st & wxODDisabled) && !(st & wxODSelected)) ? DSS_DISABLED : 0));
}
(void)SelectObject(hdc, hPrevBrush);
(void)SelectObject(hdc, hPrevFont);
(void)SetBkMode(hdc, nPrevMode);
DeleteObject(hbr);
#else
dc.SetFont(GetFont());
dc.DrawText(wxStripMenuCodes(m_strName), x, rc.y);
#endif //O_DRAW_NATIVE_API
// draw the bitmap
// ---------------
if ( IsCheckable() && !m_bmpChecked.Ok() ) {
if ( st & wxODChecked ) {
// using native APIs for performance and simplicity
#ifdef O_DRAW_NATIVE_API
// what goes on: DrawFrameControl creates a b/w mask,
// then we copy it to screen to have right colors
// first create a monochrome bitmap in a memory DC
HDC hdcMem = CreateCompatibleDC(hdc);
HBITMAP hbmpCheck = CreateBitmap(GetMarginWidth(), m_nHeight, 1, 1, 0);
SelectObject(hdcMem, hbmpCheck);
// then draw a check mark into it
RECT rect = { 0, 0, GetMarginWidth(), m_nHeight };
if ( m_nHeight > 0 )
{
::DrawFrameControl(hdcMem, &rect, DFC_MENU, DFCS_MENUCHECK);
}
// finally copy it to screen DC and clean up
BitBlt(hdc, rc.x, rc.y, GetMarginWidth(), m_nHeight,
hdcMem, 0, 0, SRCCOPY);
DeleteDC(hdcMem);
DeleteObject(hbmpCheck);
#else
// #### to do: perhaps using Marlett font (create equiv. font under X)
// wxFAIL("not implemented");
#endif //O_DRAW_NATIVE_API
}
}
else {
// for uncheckable item we use only the 'checked' bitmap
wxBitmap bmp(GetBitmap(IsCheckable() ? ((st & wxODChecked) != 0) : TRUE));
if ( bmp.Ok() ) {
wxMemoryDC dcMem(&dc);
dcMem.SelectObject(bmp);
// center bitmap
int nBmpWidth = bmp.GetWidth(),
nBmpHeight = bmp.GetHeight();
// there should be enough place!
wxASSERT((nBmpWidth <= rc.GetWidth()) && (nBmpHeight <= rc.GetHeight()));
int heightDiff = m_nHeight - nBmpHeight;
dc.Blit(rc.x + (GetMarginWidth() - nBmpWidth) / 2,
rc.y + heightDiff / 2,
nBmpWidth, nBmpHeight,
&dcMem, 0, 0, wxCOPY, TRUE /* use mask */);
if ( st & wxODSelected ) {
int x1, y1, x2, y2;
x1 = rc.x;
y1 = rc.y;
x2 = x1 + GetMarginWidth() - 1;
y2 = y1 + m_nHeight - 1;
dc.SetPen(*wxWHITE_PEN);
dc.DrawLine(x1, y1, x2, y1);
dc.DrawLine(x1, y1, x1, y2);
dc.SetPen(*wxGREY_PEN);
dc.DrawLine(x1, y2-1, x2, y2-1);
dc.DrawLine(x2, y1, x2, y2);
}
}
}
#ifdef O_DRAW_NATIVE_API
::SetTextColor(hdc, colOldText);
::SetBkColor(hdc, colOldBack);
#undef hdc
#endif //O_DRAW_NATIVE_API
return TRUE;
}
#endif // wxUSE_OWNER_DRAWN
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