/////////////////////////////////////////////////////////////////////////////
-// Name: button.cpp
+// Name: msw/button.cpp
// Purpose: wxButton
// Author: Julian Smart
// Modified by:
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
+
#ifdef __GNUG__
#pragma implementation "button.h"
#endif
#pragma hdrstop
#endif
+#if wxUSE_BUTTON
+
#ifndef WX_PRECOMP
#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 !USE_SHARED_LIBRARY
- IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
-#endif
+IMPLEMENT_DYNAMIC_CLASS(wxButton, wxControl)
// this macro tries to adjust the default button height to a reasonable value
// using the char height as the base
const wxValidator& validator,
const wxString& name)
{
- if ( !CreateBase(parent, id, pos, size, style, name) )
+ if ( !CreateControl(parent, id, pos, size, style, validator, name) )
return FALSE;
- SetValidator(validator);
+ 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()
+{
+}
- parent->AddChild((wxButton *)this);
+// ----------------------------------------------------------------------------
+// flags
+// ----------------------------------------------------------------------------
- m_backgroundColour = parent->GetBackgroundColour() ;
- m_foregroundColour = parent->GetForegroundColour() ;
+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;
+}
- m_hWnd = (WXHWND)CreateWindowEx
- (
- MakeExtendedStyle(m_windowStyle),
- _T("BUTTON"),
- label,
- WS_VISIBLE | WS_TABSTOP | WS_CHILD,
- 0, 0, 0, 0,
- GetWinHwnd(parent),
- (HMENU)m_windowId,
- wxGetInstance(),
- NULL
- );
+// ----------------------------------------------------------------------------
+// size management including autosizing
+// ----------------------------------------------------------------------------
- // Subclass again for purposes of dialog editing mode
- SubclassWin(m_hWnd);
+wxSize wxButton::DoGetBestSize() const
+{
+ wxString label = wxGetWindowText(GetHWND());
+ int wBtn;
+ GetTextExtent(label, &wBtn, NULL);
- SetFont(parent->GetFont());
+ int wChar, hChar;
+ wxGetCharSize(GetHWND(), &wChar, &hChar, &GetFont());
- SetSize(pos.x, pos.y, size.x, size.y);
+ // 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);
+
+ if (!HasFlag(wxBU_EXACTFIT))
+ {
+ wxSize sz = GetDefaultSize();
+ if (wBtn > sz.x) sz.x = wBtn;
+ if (hBtn > sz.y) sz.y = hBtn;
+ return sz;
+ }
+ else
+ return wxSize(wBtn, hBtn);
- return TRUE;
}
-wxButton::~wxButton()
+/* static */
+wxSize wxButtonBase::GetDefaultSize()
{
- wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
- if ( panel )
+ static wxSize s_sizeBtn;
+
+ if ( s_sizeBtn.x == 0 )
{
- if ( panel->GetDefaultItem() == this )
- {
- // don't leave the panel with invalid default item
- panel->SetDefaultItem(NULL);
- }
+ 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;
}
// ----------------------------------------------------------------------------
-// size management including autosizing
+// default button handling
// ----------------------------------------------------------------------------
-void wxButton::DoSetSize(int x, int y, int width, int height, int sizeFlags)
+/*
+ "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 (!).
+
+ 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.
+
+ Remark that we probably don't need to send DM_SETDEFID as we don't use
+ ::IsDialogMessage() (which relies on it) any longer but OTOH it probably
+ doesn't hurt neither.
+ */
+
+// set this button as the (permanently) default one in its panel
+void wxButton::SetDefault()
{
- int currentX, currentY;
- GetPosition(¤tX, ¤tY);
- int x1 = x;
- int y1 = y;
- if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
- x1 = currentX;
- if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
- y1 = currentY;
+ wxWindow *parent = GetParent();
- AdjustForParentClientOrigin(x1, y1, sizeFlags);
+ wxCHECK_RET( parent, _T("button without parent?") );
- int actualWidth = width;
- int actualHeight = height;
- int ww, hh;
- GetSize(&ww, &hh);
+ // set this one as the default button both for wxWindows and Windows
+ wxWindow *winOldDefault = parent->SetDefaultItem(this);
+ ::SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
- int current_width;
- int cyf;
- wxString buf = wxGetWindowText(GetHWND());
- GetTextExtent(buf, ¤t_width, &cyf, NULL, NULL, &GetFont());
+ UpdateDefaultStyle(this, winOldDefault);
+}
- // If we're prepared to use the existing width, then...
- if (width == -1 && ((sizeFlags & wxSIZE_AUTO_WIDTH) != wxSIZE_AUTO_WIDTH))
- {
- actualWidth = ww;
- }
- else if (width == -1)
- {
- int cx;
- int cy;
- wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
- actualWidth = (int)(current_width + 3*cx) ;
- }
+void wxButton::SetTmpDefault()
+{
+ wxWindow *parent = GetParent();
- // If we're prepared to use the existing height, then...
- if (height == -1 && ((sizeFlags & wxSIZE_AUTO_HEIGHT) != wxSIZE_AUTO_HEIGHT))
- {
- actualHeight = hh;
- }
- else if (height == -1)
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ wxWindow *winOldDefault = parent->GetDefaultItem();
+ parent->SetTmpDefaultItem(this);
+ if ( winOldDefault != this )
{
- actualHeight = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(cyf);
+ UpdateDefaultStyle(this, winOldDefault);
}
-
- MoveWindow(GetHwnd(), x1, y1, actualWidth, actualHeight, TRUE);
+ //else: no styles to update
}
-void wxButton::SetDefault()
+void wxButton::UnsetTmpDefault()
{
wxWindow *parent = GetParent();
- wxPanel *panel = wxDynamicCast(parent, wxPanel);
- if ( panel )
- panel->SetDefaultItem(this);
- if ( parent )
+ wxCHECK_RET( parent, _T("button without parent?") );
+
+ parent->SetTmpDefaultItem(NULL);
+
+ wxWindow *winOldDefault = parent->GetDefaultItem();
+ if ( winOldDefault != this )
+ {
+ UpdateDefaultStyle(winOldDefault, this);
+ }
+ //else: we had been default before anyhow
+}
+
+/* static */
+void
+wxButton::UpdateDefaultStyle(wxWindow *winDefault, wxWindow *winOldDefault)
+{
+ // clear the BS_DEFPUSHBUTTON for the old default button
+ wxButton *btnOldDefault = wxDynamicCast(winOldDefault, wxButton);
+ if ( btnOldDefault && btnOldDefault != winDefault )
{
- SendMessage(GetWinHwnd(parent), DM_SETDEFID, m_windowId, 0L);
+ // remove the BS_DEFPUSHBUTTON style from the other button
+ long style = ::GetWindowLong(GetHwndOf(btnOldDefault), GWL_STYLE);
+
+ // don't do it with the owner drawn buttons because it will reset
+ // BS_OWNERDRAW style bit too (BS_OWNERDRAW & BS_DEFPUSHBUTTON != 0)!
+ if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
+ {
+ style &= ~BS_DEFPUSHBUTTON;
+ ::SendMessage(GetHwndOf(btnOldDefault), BM_SETSTYLE, style, 1L);
+ }
+ else
+ {
+ // redraw the button - it will notice itself that it's not the
+ // default one any longer
+ btnOldDefault->Refresh();
+ }
}
- SendMessage(GetHwnd(), BM_SETSTYLE, BS_DEFPUSHBUTTON, 1L);
+ // and set BS_DEFPUSHBUTTON for this button
+ wxButton *btnDefault = wxDynamicCast(winDefault, wxButton);
+ if ( btnDefault )
+ {
+ long style = ::GetWindowLong(GetHwndOf(btnDefault), GWL_STYLE);
+ if ( (style & BS_OWNERDRAW) != BS_OWNERDRAW )
+ {
+ style |= BS_DEFPUSHBUTTON;
+ ::SendMessage(GetHwndOf(btnDefault), BM_SETSTYLE, style, 1L);
+ }
+ else
+ {
+ btnDefault->Refresh();
+ }
+ }
}
// ----------------------------------------------------------------------------
// event/message handlers
// ----------------------------------------------------------------------------
-bool wxButton::MSWCommand(WXUINT param, WXWORD id)
+bool wxButton::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
{
bool processed = FALSE;
- if ( param == BN_CLICKED || param == 1 ) // 1 for accelerator
+ switch ( param )
{
- processed = SendClickEvent();
+ case 1: // message came from an accelerator
+ case BN_CLICKED: // normal buttons send this
+ case BN_DOUBLECLICKED: // owner-drawn ones also send this
+ processed = SendClickEvent();
+ break;
}
return processed;
}
-WXHBRUSH wxButton::OnCtlColor(WXHDC pDC,
- WXHWND pWnd,
- WXUINT nCtlColor,
- WXUINT message,
- WXWPARAM wParam,
- WXLPARAM lParam)
+long wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
- wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
+ // 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
+ }
- return (WXHBRUSH) backgroundBrush->GetResourceHandle();
+ // 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);
+
+ DrawText(hdc, text, text.length(), pRect,
+ DT_CENTER | DT_VCENTER | DT_SINGLELINE);
+
+ SetBkMode(hdc, modeOld);
+ SetTextColor(hdc, colOld);
+}
+
+static void DrawRect(HDC hdc, const RECT& r)
+{
+ MoveToEx(hdc, r.left, r.top, NULL);
+ LineTo(hdc, r.right, r.top);
+ LineTo(hdc, r.right, r.bottom);
+ LineTo(hdc, r.left, r.bottom);
+ LineTo(hdc, 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);
+ }
+
+ MoveToEx(hdc, r.left, r.bottom, NULL);
+ LineTo(hdc, r.right, r.bottom);
+ LineTo(hdc, r.right, r.top - 1);
+
+ (void)SelectObject(hdc, hpenWhite);
+ MoveToEx(hdc, r.left, r.bottom - 1, NULL);
+ LineTo(hdc, r.left, r.top);
+ LineTo(hdc, r.right, r.top);
+
+ (void)SelectObject(hdc, hpenLightGr);
+ MoveToEx(hdc, r.left + 1, r.bottom - 2, NULL);
+ LineTo(hdc, r.left + 1, r.top + 1);
+ LineTo(hdc, r.right - 1, r.top + 1);
+
+ (void)SelectObject(hdc, hpenGrey);
+ MoveToEx(hdc, r.left + 1, r.bottom - 1, NULL);
+ LineTo(hdc, r.right - 1, r.bottom - 1);
+ LineTo(hdc, 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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