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, 4 insertions, 1 deletions

diff --git a/src/qt/walletframe.h b/src/qt/walletframe.h
index 5a5e2ab944..9a56e97f9c 100644
--- a/src/qt/walletframe.h
+++ b/src/qt/walletframe.h
@@ -10,6 +10,7 @@
 
 class BitcoinGUI;
 class ClientModel;
+class PlatformStyle;
 class SendCoinsRecipient;
 class WalletModel;
 class WalletView;
@@ -23,7 +24,7 @@ class WalletFrame : public QFrame
     Q_OBJECT
 
 public:
-    explicit WalletFrame(BitcoinGUI *_gui = 0);
+    explicit WalletFrame(const PlatformStyle *platformStyle, BitcoinGUI *_gui = 0);
     ~WalletFrame();
 
     void setClientModel(ClientModel *clientModel);
@@ -45,6 +46,8 @@ private:
 
     bool bOutOfSync;
 
+    const PlatformStyle *platformStyle;
+
     WalletView *currentWalletView();
 
 public Q_SLOTS: