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bc9fb5723a86f61f3ca538e738164a3739db66c0
wxWidgets/src/msw/button.cpp
Julian Smart bc9fb5723a Added some window style metadata 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@23160 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2003-08-24 11:35:44 +00:00

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/////////////////////////////////////////////////////////////////////////////
// Name: msw/button.cpp
// Purpose: wxButton
// Author: Julian Smart
// Modified by:
// Created: 04/01/98
// RCS-ID: $Id$
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "button.h"
#endif
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if wxUSE_BUTTON
#ifndef WX_PRECOMP
#include "wx/app.h"
#include "wx/button.h"
#include "wx/brush.h"
#include "wx/panel.h"
#include "wx/bmpbuttn.h"
#include "wx/settings.h"
#include "wx/dcscreen.h"
#endif
#include "wx/msw/private.h"
// ----------------------------------------------------------------------------
// macros
// ----------------------------------------------------------------------------
#if wxUSE_EXTENDED_RTTI
WX_DEFINE_FLAGS( wxButtonStyle )
WX_BEGIN_FLAGS( wxButtonStyle )
// new style border flags, we put them first to
// use them for streaming out
WX_FLAGS_MEMBER(wxBORDER_SIMPLE)
WX_FLAGS_MEMBER(wxBORDER_SUNKEN)
WX_FLAGS_MEMBER(wxBORDER_DOUBLE)
WX_FLAGS_MEMBER(wxBORDER_RAISED)
WX_FLAGS_MEMBER(wxBORDER_STATIC)
WX_FLAGS_MEMBER(wxBORDER_NONE)
// old style border flags
WX_FLAGS_MEMBER(wxSIMPLE_BORDER)
WX_FLAGS_MEMBER(wxSUNKEN_BORDER)
WX_FLAGS_MEMBER(wxDOUBLE_BORDER)
WX_FLAGS_MEMBER(wxRAISED_BORDER)
WX_FLAGS_MEMBER(wxSTATIC_BORDER)
WX_FLAGS_MEMBER(wxNO_BORDER)
// standard window styles
WX_FLAGS_MEMBER(wxTAB_TRAVERSAL)
WX_FLAGS_MEMBER(wxCLIP_CHILDREN)
WX_FLAGS_MEMBER(wxTRANSPARENT_WINDOW)
WX_FLAGS_MEMBER(wxWANTS_CHARS)
WX_FLAGS_MEMBER(wxNO_FULL_REPAINT_ON_RESIZE)
WX_FLAGS_MEMBER(wxALWAYS_SHOW_SB )
WX_FLAGS_MEMBER(wxVSCROLL)
WX_FLAGS_MEMBER(wxHSCROLL)
WX_FLAGS_MEMBER(wxBU_LEFT)
WX_FLAGS_MEMBER(wxBU_RIGHT)
WX_FLAGS_MEMBER(wxBU_TOP)
WX_FLAGS_MEMBER(wxBU_BOTTOM)
WX_FLAGS_MEMBER(wxBU_EXACTFIT)
WX_END_FLAGS( wxButtonStyle )
IMPLEMENT_DYNAMIC_CLASS_XTI(wxButton, wxControl,"wx/button.h")
WX_BEGIN_PROPERTIES_TABLE(wxButton)
WX_DELEGATE( OnClick , wxEVT_COMMAND_BUTTON_CLICKED , wxCommandEvent)
WX_PROPERTY( Font , wxFont , SetFont , GetFont , , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
WX_PROPERTY( Label, wxString , SetLabel, GetLabel, wxEmptyString, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
WX_PROPERTY_FLAGS( WindowStyle , wxButtonStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
WX_END_PROPERTIES_TABLE()
WX_BEGIN_HANDLERS_TABLE(wxButton)
WX_END_HANDLERS_TABLE()
WX_CONSTRUCTOR_6( wxButton , wxWindow* , Parent , wxWindowID , Id , wxString , Label , wxPoint , Position , wxSize , Size , long , WindowStyle )
#else
IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
#endif
// this macro tries to adjust the default button height to a reasonable value
// using the char height as the base
#define BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cy) (11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)/10)
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// creation/destruction
// ----------------------------------------------------------------------------
bool wxButton::Create(wxWindow *parent,
wxWindowID id,
const wxString& label,
const wxPoint& pos,
const wxSize& size,
long style,
const wxValidator& validator,
const wxString& name)
{
if ( !CreateControl(parent, id, pos, size, style, validator, name) )
return FALSE;
WXDWORD exstyle;
WXDWORD msStyle = MSWGetStyle(style, &exstyle);
#ifdef __WIN32__
// if the label contains several lines we must explicitly tell the button
// about it or it wouldn't draw it correctly ("\n"s would just appear as
// black boxes)
//
// NB: we do it here and not in MSWGetStyle() because we need the label
// value and m_label is not set yet when MSWGetStyle() is called;
// besides changing BS_MULTILINE during run-time is pointless anyhow
if ( label.find(_T('\n')) != wxString::npos )
{
msStyle |= BS_MULTILINE;
}
#endif // __WIN32__
return MSWCreateControl(_T("BUTTON"), msStyle, pos, size, label, exstyle);
}
wxButton::~wxButton()
{
}
// ----------------------------------------------------------------------------
// flags
// ----------------------------------------------------------------------------
WXDWORD wxButton::MSWGetStyle(long style, WXDWORD *exstyle) const
{
// buttons never have an external border, they draw their own one
WXDWORD msStyle = wxControl::MSWGetStyle
(
(style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
);
// we must use WS_CLIPSIBLINGS with the buttons or they would draw over
// each other in any resizeable dialog which has more than one button in
// the bottom
msStyle |= WS_CLIPSIBLINGS;
#ifdef __WIN32__
// don't use "else if" here: weird as it is, but you may combine wxBU_LEFT
// and wxBU_RIGHT to get BS_CENTER!
if ( style & wxBU_LEFT )
msStyle |= BS_LEFT;
if ( style & wxBU_RIGHT )
msStyle |= BS_RIGHT;
if ( style & wxBU_TOP )
msStyle |= BS_TOP;
if ( style & wxBU_BOTTOM )
msStyle |= BS_BOTTOM;
#endif // __WIN32__
return msStyle;
}
// ----------------------------------------------------------------------------
// size management including autosizing
// ----------------------------------------------------------------------------
wxSize wxButton::DoGetBestSize() const
{
int wBtn;
GetTextExtent(wxGetWindowText(GetHWND()), &wBtn, NULL);
int wChar, hChar;
wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
// add a margin -- the button is wider than just its label
wBtn += 3*wChar;
// the button height is proportional to the height of the font used
int hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hChar);
// all buttons have at least the standard size unless the user explicitly
// wants them to be of smaller size and used wxBU_EXACTFIT style when
// creating the button
if ( !HasFlag(wxBU_EXACTFIT) )
{
wxSize sz = GetDefaultSize();
if (wBtn > sz.x)
sz.x = wBtn;
if (hBtn > sz.y)
sz.y = hBtn;
return sz;
}
return wxSize(wBtn, hBtn);
}
/* static */
wxSize wxButtonBase::GetDefaultSize()
{
static wxSize s_sizeBtn;
if ( s_sizeBtn.x == 0 )
{
wxScreenDC dc;
dc.SetFont(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
// the size of a standard button in the dialog units is 50x14,
// translate this to pixels
// NB1: the multipliers come from the Windows convention
// NB2: the extra +1/+2 were needed to get the size be the same as the
// size of the buttons in the standard dialog - I don't know how
// this happens, but on my system this size is 75x23 in pixels and
// 23*8 isn't even divisible by 14... Would be nice to understand
// why these constants are needed though!
s_sizeBtn.x = (50 * (dc.GetCharWidth() + 1))/4;
s_sizeBtn.y = ((14 * dc.GetCharHeight()) + 2)/8;
}
return s_sizeBtn;
}
// ----------------------------------------------------------------------------
// default button handling
// ----------------------------------------------------------------------------
/*
"Everything you ever wanted to know about the default buttons" or "Why do we
have to do all this?"
In MSW the default button should be activated when the user presses Enter
and the current control doesn't process Enter itself somehow. This is
handled by ::DefWindowProc() (or maybe ::DefDialogProc()) using DM_SETDEFID
Another aspect of "defaultness" is that the default button has different
appearance: this is due to BS_DEFPUSHBUTTON style which is completely
separate from DM_SETDEFID stuff (!). Also note that BS_DEFPUSHBUTTON should
be unset if our parent window is not active so it should be unset whenever
we lose activation and set back when we regain it.
Final complication is that when a button is active, it should be the default
one, i.e. pressing Enter on a button always activates it and not another
one.
We handle this by maintaining a permanent and a temporary default items in
wxControlContainer (both may be NULL). When a button becomes the current
control (i.e. gets focus) it sets itself as the temporary default which
ensures that it has the right appearance and that Enter will be redirected
to it. When the button loses focus, it unsets the temporary default and so
the default item will be the permanent default -- that is the default button
if any had been set or none otherwise, which is just what we want.
NB: all this is quite complicated by now and the worst is that normally
it shouldn't be necessary at all as for the normal Windows programs
DefWindowProc() and IsDialogMessage() take care of all this
automatically -- however in wxWindows programs this doesn't work for
nested hierarchies (i.e. a notebook inside a notebook) for unknown
reason and so we have to reproduce all this code ourselves. It would be
very nice if we could avoid doing it.
*/
// set this button as the (permanently) default one in its panel
void wxButton::SetDefault()
{
wxWindow *parent = GetParent();
wxCHECK_RET( parent, _T("button without parent?") );
// set this one as the default button both for wxWindows ...
wxWindow *winOldDefault = parent->SetDefaultItem(this);
// ... and Windows
SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), FALSE);
SetDefaultStyle(this, TRUE);
}
// set this button as being currently default
void wxButton::SetTmpDefault()
{
wxWindow *parent = GetParent();
wxCHECK_RET( parent, _T("button without parent?") );
wxWindow *winOldDefault = parent->GetDefaultItem();
parent->SetTmpDefaultItem(this);
SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), FALSE);
SetDefaultStyle(this, TRUE);
}
// unset this button as currently default, it may still stay permanent default
void wxButton::UnsetTmpDefault()
{
wxWindow *parent = GetParent();
wxCHECK_RET( parent, _T("button without parent?") );
parent->SetTmpDefaultItem(NULL);
wxWindow *winOldDefault = parent->GetDefaultItem();
SetDefaultStyle(this, FALSE);
SetDefaultStyle(wxDynamicCast(winOldDefault, wxButton), TRUE);
}
/* static */
void
wxButton::SetDefaultStyle(wxButton *btn, bool on)
{
// we may be called with NULL pointer -- simpler to do the check here than
// in the caller which does wxDynamicCast()
if ( !btn )
return;
// first, let DefDlgProc() know about the new default button
if ( on )
{
// we shouldn't set BS_DEFPUSHBUTTON for any button if we don't have
// focus at all any more
if ( !wxTheApp->IsActive() )
return;
// look for a panel-like window
wxWindow *win = btn->GetParent();
while ( win && !win->HasFlag(wxTAB_TRAVERSAL) )
win = win->GetParent();
if ( win )
{
::SendMessage(GetHwndOf(win), DM_SETDEFID, btn->GetId(), 0L);
// sending DM_SETDEFID also changes the button style to
// BS_DEFPUSHBUTTON so there is nothing more to do
}
}
// then also change the style as needed
long style = ::GetWindowLong(GetHwndOf(btn), GWL_STYLE);
if ( !(style & BS_DEFPUSHBUTTON) == on )
{
// don't do it with the owner drawn buttons because it will
// reset BS_OWNERDRAW style bit too (as BS_OWNERDRAW &
// BS_DEFPUSHBUTTON != 0)!
if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
{
::SendMessage(GetHwndOf(btn), BM_SETSTYLE,
on ? style | BS_DEFPUSHBUTTON
: style & ~BS_DEFPUSHBUTTON,
1L /* redraw */);
}
else // owner drawn
{
// redraw the button - it will notice itself that it's
// [not] the default one [any longer]
btn->Refresh();
}
}
//else: already has correct style
}
// ----------------------------------------------------------------------------
// helpers
// ----------------------------------------------------------------------------
bool wxButton::SendClickEvent()
{
wxCommandEvent event(wxEVT_COMMAND_BUTTON_CLICKED, GetId());
event.SetEventObject(this);
return ProcessCommand(event);
}
void wxButton::Command(wxCommandEvent & event)
{
ProcessCommand(event);
}
// ----------------------------------------------------------------------------
// event/message handlers
// ----------------------------------------------------------------------------
bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
bool processed = FALSE;
switch ( param )
{
// NOTE: Apparently older versions (NT 4?) of the common controls send
// BN_DOUBLECLICKED but not a second BN_CLICKED for owner-drawn
// buttons, so in order to send two EVET_BUTTON events we should
// catch both types. Currently (Feb 2003) up-to-date versions of
// win98, win2k and winXP all send two BN_CLICKED messages for
// all button types, so we don't catch BN_DOUBLECLICKED anymore
// in order to not get 3 EVT_BUTTON events. If this is a problem
// then we need to figure out which version of the comctl32 changed
// this behaviour and test for it.
case 1: // message came from an accelerator
case BN_CLICKED: // normal buttons send this
processed = SendClickEvent();
break;
}
return processed;
}
long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
// when we receive focus, we want to temporary become the default button in
// our parent panel so that pressing "Enter" would activate us -- and when
// losing it we should restore the previous default button as well
if ( nMsg == WM_SETFOCUS )
{
SetTmpDefault();
// let the default processing take place too
}
else if ( nMsg == WM_KILLFOCUS )
{
UnsetTmpDefault();
}
else if ( nMsg == WM_LBUTTONDBLCLK )
{
// emulate a click event to force an owner-drawn button to change its
// appearance - without this, it won't do it
(void)wxControl::MSWWindowProc(WM_LBUTTONDOWN, wParam, lParam);
// and continue with processing the message normally as well
}
// let the base class do all real processing
return wxControl::MSWWindowProc(nMsg, wParam, lParam);
}
// ----------------------------------------------------------------------------
// owner-drawn buttons support
// ----------------------------------------------------------------------------
#ifdef __WIN32__
// drawing helpers
static void DrawButtonText(HDC hdc,
RECT *pRect,
const wxString& text,
COLORREF col)
{
COLORREF colOld = SetTextColor(hdc, col);
int modeOld = SetBkMode(hdc, TRANSPARENT);
// Note: we must have DT_SINGLELINE for DT_VCENTER to work.
::DrawText(hdc, text, text.length(), pRect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);
SetBkMode(hdc, modeOld);
SetTextColor(hdc, colOld);
}
static void DrawRect(HDC hdc, const RECT& r)
{
wxDrawLine(hdc, r.left, r.top, r.right, r.top);
wxDrawLine(hdc, r.right, r.top, r.right, r.bottom);
wxDrawLine(hdc, r.right, r.bottom, r.left, r.bottom);
wxDrawLine(hdc, r.left, r.bottom, r.left, r.top);
}
void wxButton::MakeOwnerDrawn()
{
long style = GetWindowLong(GetHwnd(), GWL_STYLE);
if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
{
// make it so
style |= BS_OWNERDRAW;
SetWindowLong(GetHwnd(), GWL_STYLE, style);
}
}
bool wxButton::SetBackgroundColour(const wxColour &colour)
{
if ( !wxControl::SetBackgroundColour(colour) )
{
// nothing to do
return FALSE;
}
MakeOwnerDrawn();
Refresh();
return TRUE;
}
bool wxButton::SetForegroundColour(const wxColour &colour)
{
if ( !wxControl::SetForegroundColour(colour) )
{
// nothing to do
return FALSE;
}
MakeOwnerDrawn();
Refresh();
return TRUE;
}
/*
The button frame looks like this normally:
WWWWWWWWWWWWWWWWWWB
WHHHHHHHHHHHHHHHHGB W = white (HILIGHT)
WH GB H = light grey (LIGHT)
WH GB G = dark grey (SHADOW)
WH GB B = black (DKSHADOW)
WH GB
WGGGGGGGGGGGGGGGGGB
BBBBBBBBBBBBBBBBBBB
When the button is selected, the button becomes like this (the total button
size doesn't change):
BBBBBBBBBBBBBBBBBBB
BWWWWWWWWWWWWWWWWBB
BWHHHHHHHHHHHHHHGBB
BWH GBB
BWH GBB
BWGGGGGGGGGGGGGGGBB
BBBBBBBBBBBBBBBBBBB
BBBBBBBBBBBBBBBBBBB
When the button is pushed (while selected) it is like:
BBBBBBBBBBBBBBBBBBB
BGGGGGGGGGGGGGGGGGB
BG GB
BG GB
BG GB
BG GB
BGGGGGGGGGGGGGGGGGB
BBBBBBBBBBBBBBBBBBB
*/
static void DrawButtonFrame(HDC hdc, const RECT& rectBtn,
bool selected, bool pushed)
{
RECT r;
CopyRect(&r, &rectBtn);
HPEN hpenBlack = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DDKSHADOW)),
hpenGrey = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DSHADOW)),
hpenLightGr = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DLIGHT)),
hpenWhite = CreatePen(PS_SOLID, 1, GetSysColor(COLOR_3DHILIGHT));
HPEN hpenOld = (HPEN)SelectObject(hdc, hpenBlack);
r.right--;
r.bottom--;
if ( pushed )
{
DrawRect(hdc, r);
(void)SelectObject(hdc, hpenGrey);
InflateRect(&r, -1, -1);
DrawRect(hdc, r);
}
else // !pushed
{
if ( selected )
{
DrawRect(hdc, r);
InflateRect(&r, -1, -1);
}
wxDrawLine(hdc, r.left, r.bottom, r.right, r.bottom);
wxDrawLine(hdc, r.right, r.bottom, r.right, r.top - 1);
(void)SelectObject(hdc, hpenWhite);
wxDrawLine(hdc, r.left, r.bottom - 1, r.left, r.top);
wxDrawLine(hdc, r.left, r.top, r.right, r.top);
(void)SelectObject(hdc, hpenLightGr);
wxDrawLine(hdc, r.left + 1, r.bottom - 2, r.left + 1, r.top + 1);
wxDrawLine(hdc, r.left + 1, r.top + 1, r.right - 1, r.top + 1);
(void)SelectObject(hdc, hpenGrey);
wxDrawLine(hdc, r.left + 1, r.bottom - 1, r.right - 1, r.bottom - 1);
wxDrawLine(hdc, r.right - 1, r.bottom - 1, r.right - 1, r.top);
}
(void)SelectObject(hdc, hpenOld);
DeleteObject(hpenWhite);
DeleteObject(hpenLightGr);
DeleteObject(hpenGrey);
DeleteObject(hpenBlack);
}
bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
{
LPDRAWITEMSTRUCT lpDIS = (LPDRAWITEMSTRUCT)wxdis;
RECT rectBtn;
CopyRect(&rectBtn, &lpDIS->rcItem);
COLORREF colBg = wxColourToRGB(GetBackgroundColour()),
colFg = wxColourToRGB(GetForegroundColour());
HDC hdc = lpDIS->hDC;
UINT state = lpDIS->itemState;
// first, draw the background
HBRUSH hbrushBackground = ::CreateSolidBrush(colBg);
FillRect(hdc, &rectBtn, hbrushBackground);
// draw the border for the current state
bool selected = (state & ODS_SELECTED) != 0;
if ( !selected )
{
wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
if ( panel )
{
selected = panel->GetDefaultItem() == this;
}
}
bool pushed = (SendMessage(GetHwnd(), BM_GETSTATE, 0, 0) & BST_PUSHED) != 0;
DrawButtonFrame(hdc, rectBtn, selected, pushed);
// draw the focus rect if needed
if ( state & ODS_FOCUS )
{
RECT rectFocus;
CopyRect(&rectFocus, &rectBtn);
// I don't know where does this constant come from, but this is how
// Windows draws them
InflateRect(&rectFocus, -4, -4);
DrawFocusRect(hdc, &rectFocus);
}
if ( pushed )
{
// the label is shifted by 1 pixel to create "pushed" effect
OffsetRect(&rectBtn, 1, 1);
}
DrawButtonText(hdc, &rectBtn, GetLabel(),
state & ODS_DISABLED ? GetSysColor(COLOR_GRAYTEXT)
: colFg);
::DeleteObject(hbrushBackground);
return TRUE;
}
#endif // __WIN32__
#endif // wxUSE_BUTTON
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