Remove unnecessary wxUSE_DISPLAY preprocessor checks

Most of the methods of wxDisplay are always available, they just only
support primary display when wxUSE_DISPLAY==0, so there is no need to
check for wxUSE_DISPLAY before using them as they already contain the
only possible fallback anyhow and such checks are useless.

This incidentally closes #18115, due to removing "#if wxUSE_DISPLAY"
around wx/display.h inclusion.

src/common/dlgcmn.cpp

@@ -44,9 +44,7 @@
 #include "wx/textwrapper.h"
 #include "wx/modalhook.h"
 
-#if wxUSE_DISPLAY
 #include "wx/display.h"
-#endif
 
 extern WXDLLEXPORT_DATA(const char) wxDialogNameStr[] = "dialog";
 
@@ -873,11 +871,7 @@ int wxStandardDialogLayoutAdapter::DoMustScroll(wxDialog* dialog, wxSize& window
     wxSize minWindowSize = dialog->GetSizer()->GetMinSize();
     windowSize = dialog->GetSize();
     windowSize = wxSize(wxMax(windowSize.x, minWindowSize.x), wxMax(windowSize.y, minWindowSize.y));
-#if wxUSE_DISPLAY
     displaySize = wxDisplay(wxDisplay::GetFromWindow(dialog)).GetClientArea().GetSize();
-#else
-    displaySize = wxGetClientDisplayRect().GetSize();
-#endif
 
     int flags = 0;
 

src/msw/toplevel.cpp

@@ -905,20 +905,13 @@ bool wxTopLevelWindowMSW::ShowFullScreen(bool show, long style)
         // change our window style to be compatible with full-screen mode
         updateStyle.Apply();
 
-        wxRect rect;
-#if wxUSE_DISPLAY
-        // resize to the size of the display containing us
+        // resize to the size of the display containing us, falling back to the
+        // primary one
         int dpy = wxDisplay::GetFromWindow(this);
-        if ( dpy != wxNOT_FOUND )
-        {
-            rect = wxDisplay(dpy).GetGeometry();
-        }
-        else // fall back to the main desktop
-#endif // wxUSE_DISPLAY
-        {
-            // resize to the size of the desktop
-            wxCopyRECTToRect(wxGetWindowRect(::GetDesktopWindow()), rect);
-        }
+        if ( dpy == wxNOT_FOUND )
+            dpy = 0;
+
+        const wxRect rect = wxDisplay(dpy).GetGeometry();
 
         SetSize(rect);
 

src/stc/PlatWX.cpp

@@ -1953,17 +1953,11 @@ void Window::SetTitle(const char *s) {
 
 // Returns rectangle of monitor pt is on
 PRectangle Window::GetMonitorRect(Point pt) {
-    wxRect rect;
     if (! wid) return PRectangle();
-#if wxUSE_DISPLAY
     // Get the display the point is found on
     int n = wxDisplay::GetFromPoint(wxPoint(wxRound(pt.x), wxRound(pt.y)));
     wxDisplay dpy(n == wxNOT_FOUND ? 0 : n);
-    rect = dpy.GetGeometry();
-#else
-    wxUnusedVar(pt);
-#endif
-    return PRectangleFromwxRect(rect);
+    return PRectangleFromwxRect(dpy.GetGeometry());
 }
 
 //----------------------------------------------------------------------