Add flag to hide eye dropper button from QColorDialog

There are cases where this eye dropper control is useful and other
cases where it is useless. In case of an application connected with
graphics it's useful because it allows to select a precise color in
a very simple way. But in the case of a simple app where the user
only has to choose a color for, example, a graph this control is
useless and risks confusing the user (this kind of control is only
present in graphics software, not all "normal" users know what it
is for or understand its use). This patch add a flag to hide the
button.

As a drive-by change, the internal screenColorPickerButton pointer
is renamed to eyeDropperButton to be more consistent with the
qml ColorDialog.

[ChangeLog][QtWidgets][QColorDialog] Added a NoEyeDropperButton
option to hide the eye dropper button.

Change-Id: Ib29d5343383af97c1f488f9e33749517181aead7
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gui/kernel/qplatformdialoghelper.h b/src/gui/kernel/qplatformdialoghelper.h
index fabc4985a3..150a2333c1 100644
--- a/src/gui/kernel/qplatformdialoghelper.h
+++ b/src/gui/kernel/qplatformdialoghelper.h
@@ -157,7 +157,8 @@ public:
     enum ColorDialogOption {
         ShowAlphaChannel    = 0x00000001,
         NoButtons           = 0x00000002,
-        DontUseNativeDialog = 0x00000004
+        DontUseNativeDialog = 0x00000004,
+        NoEyeDropperButton  = 0x00000008
     };
 
     Q_DECLARE_FLAGS(ColorDialogOptions, ColorDialogOption)