Further tweaks that affect the "tunnelled" dialogs in the iOS app

The bestmaxFrameSizeForScreenSize() function is full of magic numbers.
(There originally, in OOo times, was a comment in there that said
"fill in holy default values brought to us by product management"
which says it all, really.) Those numbers have little or no relevance
on iOS. Instead, make this function return the largest square that
will fit on the display (square so that it will fit in either
orientation, in case the device is rotated while a tunnelled dialog is
displayed).

And as a consequence the defaut font size on iOS can be bumped up a
bit, to 10. Now the problematic dialogs look even better.

Change-Id: I043d8f9947520adb04bd952ee49f9c7844a1fa8c

2 files changed, 22 insertions, 2 deletions

diff --git a/vcl/ios/iosinst.cxx b/vcl/ios/iosinst.cxx
index 8f58c239a677..35d1f400745f 100644
--- a/vcl/ios/iosinst.cxx
+++ b/vcl/ios/iosinst.cxx
@@ -28,7 +28,7 @@
 #include <vcl/layout.hxx>
 #include <vcl/settings.hxx>
 
-// Horrible hack
+// Totally wrong of course but doesn't seem to harm much in the iOS app.
 static int viewWidth = 1, viewHeight = 1;
 
 class IosSalData : public GenericUnixSalData
@@ -107,7 +107,7 @@ public:
     virtual void UpdateSettings( AllSettings &rSettings ) override
     {
         // Clobber the UI fonts
-        vcl::Font aFont( OUString::fromUtf8( [[[UIFont systemFontOfSize:7] familyName] UTF8String] ), Size( 0, 7 ) );
+        vcl::Font aFont( OUString::fromUtf8( [[[UIFont systemFontOfSize:10] familyName] UTF8String] ), Size( 0, 10 ) );
 
         StyleSettings aStyleSet = rSettings.GetStyleSettings();
         aStyleSet.SetAppFont( aFont );
diff --git a/vcl/source/window/dialog.cxx b/vcl/source/window/dialog.cxx
index 2bc62fbc00ee..84d98914fd74 100644
--- a/vcl/source/window/dialog.cxx
+++ b/vcl/source/window/dialog.cxx
@@ -19,6 +19,12 @@
 
 #include <config_features.h>
 
+#ifdef IOS
+#include <premac.h>
+#include <UIKit/UIKit.h>
+#include <postmac.h>
+#endif
+
 #include <com/sun/star/beans/XPropertySet.hpp>
 #include <com/sun/star/util/thePathSettings.hpp>
 #include <com/sun/star/frame/theGlobalEventBroadcaster.hpp>
@@ -679,6 +685,7 @@ bool Dialog::EventNotify( NotifyEvent& rNEvt )
 //taskbar, menus, etc.
 Size bestmaxFrameSizeForScreenSize(const Size &rScreenSize)
 {
+#ifndef IOS
     long w = rScreenSize.Width();
     if (w <= 800)
         w -= 15;
@@ -695,6 +702,19 @@ Size bestmaxFrameSizeForScreenSize(const Size &rScreenSize)
 
     return Size(std::max<long>(w, 640 - 15),
                 std::max<long>(h, 480 - 50));
+#else
+    // Don't bother with ancient magic numbers of unclear relevance on non-desktop apps anyway. It
+    // seems that at least currently in the iOS app, this function is called just once per dialog,
+    // with a rScreenSize parameter of 1x1 (!). This would lead to always returning 625x430 which is
+    // a bit random and needlessly small on an iPad at least. We want something that closely will
+    // just fit on the display in either orientation.
+
+    // We ignore the rScreenSize as it will be the dummy 1x1 from iosinst.cxx (see "Totally wrong of course").
+    (void) rScreenSize;
+
+    const int n = std::min<CGFloat>([[UIScreen mainScreen] bounds].size.width, [[UIScreen mainScreen] bounds].size.height);
+    return Size(n-10, n-10);
+#endif
 }
 
 void Dialog::StateChanged( StateChangedType nType )