qt: Introduce PlatformStyle

Introduce a PlatformStyle to handle platform-specific customization of
the UI.

This replaces 'scicon', as well as #ifdefs to determine whether to place
icons on buttons.

The selected PlatformStyle defaults to the platform that the application
was compiled on, but can be overridden from the command line with
`-uiplatform=<x>`.

Also fixes the warning from #6328.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/qt/rpcconsole.h b/src/qt/rpcconsole.h
index 6f42aa08b7..b94efee84a 100644
--- a/src/qt/rpcconsole.h
+++ b/src/qt/rpcconsole.h
@@ -13,6 +13,7 @@
 #include <QWidget>
 
 class ClientModel;
+class PlatformStyle;
 
 namespace Ui {
     class RPCConsole;
@@ -29,7 +30,7 @@ class RPCConsole: public QWidget
     Q_OBJECT
 
 public:
-    explicit RPCConsole(QWidget *parent);
+    explicit RPCConsole(const PlatformStyle *platformStyle, QWidget *parent);
     ~RPCConsole();
 
     void setClientModel(ClientModel *model);
@@ -106,6 +107,7 @@ private:
     int historyPtr;
     NodeId cachedNodeid;
     QMenu *contextMenu;
+    const PlatformStyle *platformStyle;
 };
 
 #endif // BITCOIN_QT_RPCCONSOLE_H