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/sendcoinsentry.h b/src/qt/sendcoinsentry.h
index d7e655fdc3..107ab70158 100644
--- a/src/qt/sendcoinsentry.h
+++ b/src/qt/sendcoinsentry.h
@@ -10,6 +10,7 @@
 #include <QStackedWidget>
 
 class WalletModel;
+class PlatformStyle;
 
 namespace Ui {
     class SendCoinsEntry;
@@ -25,7 +26,7 @@ class SendCoinsEntry : public QStackedWidget
     Q_OBJECT
 
 public:
-    explicit SendCoinsEntry(QWidget *parent = 0);
+    explicit SendCoinsEntry(const PlatformStyle *platformStyle, QWidget *parent = 0);
     ~SendCoinsEntry();
 
     void setModel(WalletModel *model);
@@ -64,6 +65,7 @@ private:
     SendCoinsRecipient recipient;
     Ui::SendCoinsEntry *ui;
     WalletModel *model;
+    const PlatformStyle *platformStyle;
 
     bool updateLabel(const QString &address);
 };