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/walletview.h b/src/qt/walletview.h
index 87c5d7bfbf..f97cf1ee80 100644
--- a/src/qt/walletview.h
+++ b/src/qt/walletview.h
@@ -12,6 +12,7 @@
 class BitcoinGUI;
 class ClientModel;
 class OverviewPage;
+class PlatformStyle;
 class ReceiveCoinsDialog;
 class SendCoinsDialog;
 class SendCoinsRecipient;
@@ -34,7 +35,7 @@ class WalletView : public QStackedWidget
     Q_OBJECT
 
 public:
-    explicit WalletView(QWidget *parent);
+    explicit WalletView(const PlatformStyle *platformStyle, QWidget *parent);
     ~WalletView();
 
     void setBitcoinGUI(BitcoinGUI *gui);
@@ -64,6 +65,7 @@ private:
     TransactionView *transactionView;
 
     QProgressDialog *progressDialog;
+    const PlatformStyle *platformStyle;
 
 public Q_SLOTS:
     /** Switch to overview (home) page */