Implement GetSizeFromTextSize() for wxSpinCtrl.

Implement it for the native MSW and GTK versions and the generic one used in
the other ports and also for wxSpinCtrlDouble under MSW.

Also test this function in the spin page of the widgets sample.

Closes #14840.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72995 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/spinctlg.h

@@ -108,6 +108,7 @@ public:
 protected:
     // override the base class virtuals involved into geometry calculations
     virtual wxSize DoGetBestSize() const;
+    virtual wxSize DoGetSizeFromTextSize(int xlen, int ylen = -1) const;
     virtual void DoMoveWindow(int x, int y, int width, int height);
 
 #ifdef __WXMSW__

include/wx/gtk/spinctrl.h

@@ -73,6 +73,7 @@ protected:
     void GtkEnableEvents() const;
 
     virtual wxSize DoGetBestSize() const;
+    virtual wxSize DoGetSizeFromTextSize(int xlen, int ylen = -1) const;
     virtual GdkWindow *GTKGetWindow(wxArrayGdkWindows& windows) const;
 
     // Widgets that use the style->base colour for the BG colour should

include/wx/msw/spinctrl.h

@@ -116,6 +116,7 @@ protected:
     virtual void DoGetPosition(int *x, int *y) const;
     virtual void DoMoveWindow(int x, int y, int width, int height);
     virtual wxSize DoGetBestSize() const;
+    virtual wxSize DoGetSizeFromTextSize(int xlen, int ylen = -1) const;
     virtual void DoGetSize(int *width, int *height) const;
     virtual void DoGetClientSize(int *x, int *y) const;
 #if wxUSE_TOOLTIPS

samples/widgets/spinbtn.cpp

@@ -460,6 +460,19 @@ void SpinBtnWidgetsPage::OnButtonSetMinAndMax(wxCommandEvent& WXUNUSED(event))
 
     m_min = minNew;
     m_max = maxNew;
+    wxString smax('9', m_textMax->GetValue().length());
+    wxSize
+      size = m_spinctrl->GetSizeFromTextSize(m_spinctrl->GetTextExtent(smax));
+
+    m_spinctrl->SetMinSize(size);
+    m_spinctrl->SetSize(size);
+
+    smax += ".0";
+    size = m_spinctrldbl->GetSizeFromTextSize(
+                m_spinctrldbl->GetTextExtent(smax)
+            );
+    m_spinctrldbl->SetMinSize(size);
+    m_spinctrldbl->SetSize(size);
 
     m_spinbtn->SetRange(minNew, maxNew);
     m_spinctrl->SetRange(minNew, maxNew);

samples/widgets/widgets.cpp

@@ -875,6 +875,10 @@ void WidgetsFrame::OnSetFont(wxCommandEvent& WXUNUSED(event))
         (*it)->SetFont(m_font);
         (*it)->Refresh();
     }
+
+    // The best size of the widget could have changed after changing its font,
+    // so re-layout to show it correctly.
+    page->Layout();
 #else
     wxLogMessage(wxT("Font selection dialog not available in current build."));
 #endif

src/generic/spinctlg.cpp

@@ -283,10 +283,26 @@ wxWindowList wxSpinCtrlGenericBase::GetCompositeWindowParts() const
 
 wxSize wxSpinCtrlGenericBase::DoGetBestSize() const
 {
-    wxSize sizeBtn  = m_spinButton->GetBestSize(),
-           sizeText = m_textCtrl->GetBestSize();
+    return DoGetSizeFromTextSize(m_textCtrl->GetBestSize().x, -1);
+}
 
-    return wxSize(sizeBtn.x + sizeText.x + MARGIN, sizeText.y);
+wxSize wxSpinCtrlGenericBase::DoGetSizeFromTextSize(int xlen, int ylen) const
+{
+    wxSize sizeBtn  = m_spinButton->GetBestSize();
+    wxSize totalS( m_textCtrl->GetBestSize() );
+
+    wxSize tsize(xlen + sizeBtn.x + MARGIN, totalS.y);
+#if defined(__WXMSW__)
+    tsize.IncBy(0.4 * totalS.y + 4, 0);
+#elif defined(__WXGTK__)
+    tsize.IncBy(totalS.y + 10, 0);
+#endif // MSW GTK
+
+    // Check if the user requested a non-standard height.
+    if ( ylen > 0 )
+        tsize.IncBy(0, ylen - GetCharHeight());
+
+    return tsize;
 }
 
 void wxSpinCtrlGenericBase::DoMoveWindow(int x, int y, int width, int height)

src/gtk/spinctrl.cpp

@@ -337,10 +337,39 @@ GdkWindow *wxSpinCtrlGTKBase::GTKGetWindow(wxArrayGdkWindows& windows) const
 
 wxSize wxSpinCtrlGTKBase::DoGetBestSize() const
 {
-    wxSize ret( wxControl::DoGetBestSize() );
-    wxSize best(95, ret.y); // FIXME: 95?
-    CacheBestSize(best);
-    return best;
+    return DoGetSizeFromTextSize(95); // TODO: 95 is completely arbitrary
+}
+
+wxSize wxSpinCtrlGTKBase::DoGetSizeFromTextSize(int xlen, int ylen) const
+{
+    wxASSERT_MSG( m_widget, wxS("GetSizeFromTextSize called before creation") );
+
+    // Set an as small as possible size for the control, so preferred sizes
+    // return "natural" sizes, not taking into account the previous ones (which
+    // seems to be GTK+3 behaviour)
+    gtk_widget_set_size_request(m_widget, 0, 0);
+
+    // Both Gtk+2 and Gtk+3 use current value/range to measure control's width.
+    // So, we can't ask Gtk+ for its width. Instead, we used hardcoded values.
+
+    // Returned height is OK
+    wxSize totalS = GTKGetPreferredSize(m_widget);
+
+#if GTK_CHECK_VERSION(3,4,0)
+    // two buttons in horizontal
+    totalS.x = 46 + 15; // margins included
+#else
+    // two small buttons in vertical
+    totalS.x = GetFont().GetPixelSize().y + 13; // margins included
+#endif
+
+    wxSize tsize(xlen + totalS.x, totalS.y);
+
+    // Check if the user requested a non-standard height.
+    if ( ylen > 0 )
+        tsize.IncBy(0, ylen - GetCharHeight());
+
+    return tsize;
 }
 
 // static

src/msw/spinctrl.cpp

@@ -717,26 +717,29 @@ bool wxSpinCtrl::MSWOnNotify(int WXUNUSED(idCtrl), WXLPARAM lParam, WXLPARAM *re
 // ----------------------------------------------------------------------------
 
 wxSize wxSpinCtrl::DoGetBestSize() const
+{
+    return DoGetSizeFromTextSize(DEFAULT_ITEM_WIDTH);
+}
+
+wxSize wxSpinCtrl::DoGetSizeFromTextSize(int xlen, int ylen) const
 {
     wxSize sizeBtn = wxSpinButton::DoGetBestSize();
-    sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;
 
     int y;
     wxGetCharSize(GetHWND(), NULL, &y, GetFont());
-    y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);
-
     // JACS: we should always use the height calculated
     // from above, because otherwise we'll get a spin control
     // that's too big. So never use the height calculated
     // from wxSpinButton::DoGetBestSize().
 
-    // if ( sizeBtn.y < y )
-    {
-        // make the text tall enough
-        sizeBtn.y = y;
-    }
+    wxSize tsize(xlen + sizeBtn.x + MARGIN_BETWEEN + 0.3 * y + 10,
+                 EDIT_HEIGHT_FROM_CHAR_HEIGHT(y));
 
-    return sizeBtn;
+    // Check if the user requested a non-standard height.
+    if ( ylen > 0 )
+        tsize.IncBy(0, ylen - y);
+
+    return tsize;
 }
 
 void wxSpinCtrl::DoMoveWindow(int x, int y, int width, int height)