X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/533171c2873027b260f7107451ab22992d9e3926..591cc82deb5bc6dd0af6047ecfa7ce7cf4f8d859:/src/msw/button.cpp

diff --git a/src/msw/button.cpp b/src/msw/button.cpp
index b342fbc0b2..ef43802277 100644
--- a/src/msw/button.cpp
+++ b/src/msw/button.cpp
@@ -72,6 +72,10 @@
     #define ODS_NOFOCUSRECT     0x0200
 #endif
 
+#ifndef DT_HIDEPREFIX
+    #define DT_HIDEPREFIX       0x00100000
+#endif
+
 // ----------------------------------------------------------------------------
 // macros
 // ----------------------------------------------------------------------------
@@ -137,14 +141,69 @@ wxCONSTRUCTOR_6( wxButton , wxWindow* , Parent , wxWindowID , Id , wxString , La
 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
 // ============================================================================
 
+// ----------------------------------------------------------------------------
+// helper functions from wx/msw/private/button.h
+// ----------------------------------------------------------------------------
+
+void wxMSWButton::UpdateMultilineStyle(HWND hwnd, const wxString& label)
+{
+    // update BS_MULTILINE style depending on the new label (resetting it
+    // doesn't seem to do anything very useful but it shouldn't hurt and we do
+    // have to set it whenever the label becomes multi line as otherwise it
+    // wouldn't be shown correctly as we don't use BS_MULTILINE when creating
+    // the control unless it already has new lines in its label)
+    long styleOld = ::GetWindowLong(hwnd, GWL_STYLE),
+         styleNew;
+    if ( label.find(_T('\n')) != wxString::npos )
+        styleNew = styleOld | BS_MULTILINE;
+    else
+        styleNew = styleOld & ~BS_MULTILINE;
+
+    if ( styleNew != styleOld )
+        ::SetWindowLong(hwnd, GWL_STYLE, styleNew);
+}
+
+wxSize wxMSWButton::GetFittingSize(wxWindow *win, const wxSize& sizeLabel)
+{
+    // FIXME: this is pure guesswork, need to retrieve the real button margins
+    wxSize sizeBtn = sizeLabel;
+
+    sizeBtn.x += 3*win->GetCharWidth();
+    sizeBtn.y = 11*EDIT_HEIGHT_FROM_CHAR_HEIGHT(sizeLabel.y)/10;
+
+    return sizeBtn;
+}
+
+wxSize wxMSWButton::ComputeBestSize(wxControl *btn)
+{
+    wxClientDC dc(btn);
+
+    wxSize sizeBtn;
+    dc.GetMultiLineTextExtent(btn->GetLabelText(), &sizeBtn.x, &sizeBtn.y);
+
+    sizeBtn = GetFittingSize(btn, sizeBtn);
+
+    // 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 ( !btn->HasFlag(wxBU_EXACTFIT) )
+    {
+        wxSize sizeDef = wxButton::GetDefaultSize();
+        if ( sizeBtn.x < sizeDef.x )
+            sizeBtn.x = sizeDef.x;
+        if ( sizeBtn.y < sizeDef.y )
+            sizeBtn.y = sizeDef.y;
+    }
+
+    btn->CacheBestSize(sizeBtn);
+
+    return sizeBtn;
+}
+
 // ----------------------------------------------------------------------------
 // creation/destruction
 // ----------------------------------------------------------------------------
@@ -246,34 +305,7 @@ void wxButton::SetLabel(const wxString& label)
 
 wxSize wxButton::DoGetBestSize() const
 {
-    wxClientDC dc(wx_const_cast(wxButton *, this));
-    dc.SetFont(GetFont());
-
-    wxCoord wBtn,
-            hBtn;
-    dc.GetMultiLineTextExtent(GetLabelText(), &wBtn, &hBtn);
-
-    // add a margin -- the button is wider than just its label
-    wBtn += 3*GetCharWidth();
-    hBtn = BUTTON_HEIGHT_FROM_CHAR_HEIGHT(hBtn);
-
-    // 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;
-    }
-
-    wxSize best(wBtn, hBtn);
-    CacheBestSize(best);
-    return best;
+    return wxMSWButton::ComputeBestSize(const_cast<wxButton *>(this));
 }
 
 /* static */
@@ -562,11 +594,15 @@ WXLRESULT wxButton::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 static void DrawButtonText(HDC hdc,
                            RECT *pRect,
                            const wxString& text,
-                           COLORREF col)
+                           COLORREF col,
+                           int flags)
 {
     COLORREF colOld = SetTextColor(hdc, col);
     int modeOld = SetBkMode(hdc, TRANSPARENT);
 
+    // center text horizontally in any case
+    flags |= DT_CENTER;
+
     if ( text.find(_T('\n')) != wxString::npos )
     {
         // draw multiline label
@@ -585,13 +621,14 @@ static void DrawButtonText(HDC hdc,
         rc.top = (pRect->bottom - pRect->top)/2 - h/2;
         rc.bottom = rc.top+h;
 
-        ::DrawText(hdc, text.wx_str(), text.length(), &rc, DT_CENTER);
+        ::DrawText(hdc, text.wx_str(), text.length(), &rc, flags);
     }
     else // single line label
     {
-        // Note: we must have DT_SINGLELINE for DT_VCENTER to work.
+        // centre text vertically too (notice that we must have DT_SINGLELINE
+        // for DT_VCENTER to work)
         ::DrawText(hdc, text.wx_str(), text.length(), pRect,
-                   DT_SINGLELINE | DT_CENTER | DT_VCENTER);
+                   flags | DT_SINGLELINE | DT_VCENTER);
     }
 
     SetBkMode(hdc, modeOld);
@@ -870,13 +907,18 @@ bool wxButton::MSWOnDraw(WXDRAWITEMSTRUCT *wxdis)
         }
     }
 
-    COLORREF colFg = wxColourToRGB(GetForegroundColour());
-    if ( state & ODS_DISABLED ) colFg = GetSysColor(COLOR_GRAYTEXT) ;
-    wxString label = GetLabel();
-    if ( state & ODS_NOACCEL ) label = GetLabelText() ;
-    DrawButtonText(hdc, &rectBtn, label, colFg);
+    COLORREF colFg = state & ODS_DISABLED
+                        ? ::GetSysColor(COLOR_GRAYTEXT)
+                        : wxColourToRGB(GetForegroundColour());
+
+    // notice that DT_HIDEPREFIX doesn't work on old (pre-Windows 2000) systems
+    // but by happy coincidence ODS_NOACCEL is not used under them neither so
+    // DT_HIDEPREFIX should never be used there
+    DrawButtonText(hdc, &rectBtn, GetLabel(), colFg,
+                   state & ODS_NOACCEL ? DT_HIDEPREFIX : 0);
 
     return true;
 }
 
 #endif // wxUSE_BUTTON
+