From e4c54c9f40f9e0892c9193257aaaa3f805e153ff Mon Sep 17 00:00:00 2001
From: mattias <nc-gaertnma@netcologne.de>
Date: Sun, 14 Feb 2016 09:08:06 +0000
Subject: [PATCH] QT+GTK2: Fix TFloatSpinEdit not being unconstrained when
 MinValue = MaxValue. Issue #29645

git-svn-id: branches/fixes_1_6@51621 -
---
 lcl/interfaces/gtk2/gtk2wsspin.pp | 14 +++++++++++---
 lcl/interfaces/qt/qtwsspin.pp     | 15 ++++++++++++---
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/lcl/interfaces/gtk2/gtk2wsspin.pp b/lcl/interfaces/gtk2/gtk2wsspin.pp
index 32a9f37478..6cf095fbb4 100644
--- a/lcl/interfaces/gtk2/gtk2wsspin.pp
+++ b/lcl/interfaces/gtk2/gtk2wsspin.pp
@@ -155,8 +155,16 @@ begin
   end
   else
   begin
-    AnAdjustment^.lower := TCustomFloatSpinEdit(ACustomEdit).MinValue;
-    AnAdjustment^.upper := TCustomFloatSpinEdit(ACustomEdit).MaxValue;
+    if (TCustomFloatSpinEdit(ACustomEdit).MaxValue > TCustomFloatSpinEdit(ACustomEdit).MinValue) then
+    begin
+      AnAdjustment^.lower := TCustomFloatSpinEdit(ACustomEdit).MinValue;
+      AnAdjustment^.upper := TCustomFloatSpinEdit(ACustomEdit).MaxValue;
+    end
+    else
+    begin
+      AnAdjustment^.lower := -MaxDouble;
+      AnAdjustment^.upper := MaxDouble;
+    end;
   end;
   gtk_spin_button_update(GTK_SPIN_BUTTON(Widget));
 end;
@@ -175,7 +183,7 @@ begin
   wHandle := ACustomFloatSpinEdit.Handle;
   SpinWidget:=GTK_SPIN_BUTTON({%H-}Pointer(wHandle));
 
-  if ACustomFloatSpinEdit.MaxValue >= ACustomFloatSpinEdit.MinValue then
+  if ACustomFloatSpinEdit.MaxValue > ACustomFloatSpinEdit.MinValue then
   begin
     AMin := ACustomFloatSpinEdit.MinValue;
     AMax := ACustomFloatSpinEdit.MaxValue;
diff --git a/lcl/interfaces/qt/qtwsspin.pp b/lcl/interfaces/qt/qtwsspin.pp
index 43399f05bc..3c5c911e08 100644
--- a/lcl/interfaces/qt/qtwsspin.pp
+++ b/lcl/interfaces/qt/qtwsspin.pp
@@ -28,6 +28,8 @@ uses
   qtwidgets,
   // LCL
   Spin, SysUtils, Controls, Classes, LCLType, LCLProc, LCLIntf, Forms, StdCtrls,
+  //RTL
+  Math,
   // Widgetset
   WsProc, WSSpin, WSLCLClasses;
 
@@ -69,9 +71,16 @@ begin
   try
     if ASpinWidget is TQtFloatSpinBox then
       TQtFloatSpinBox(ASpinWidget).setDecimals(ACustomFloatSpinEdit.DecimalPlaces);
-
-    ASpinWidget.setMinimum(ACustomFloatSpinEdit.MinValue);
-    ASpinWidget.setMaximum(ACustomFloatSpinEdit.MaxValue);
+    if (ACustomFloatSpinEdit.MaxValue > ACustomFloatSpinEdit.MinValue) then
+    begin
+      ASpinWidget.setMinimum(ACustomFloatSpinEdit.MinValue);
+      ASpinWidget.setMaximum(ACustomFloatSpinEdit.MaxValue);
+    end
+    else
+    begin
+      ASpinWidget.setMinimum(-MaxDouble);
+      ASpinWidget.setMaximum(MaxDouble);
+    end;
     ASpinWidget.setSingleStep(ACustomFloatSpinEdit.Increment);
   finally
     ASpinWidget.EndUpdate;