Add shift selection, and fix the bug that caret is at wrong position when move with selection.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/ui/ui_base.cpp b/src/ui/ui_base.cpp
index 550432e4..3bee2269 100644
--- a/src/ui/ui_base.cpp
+++ b/src/ui/ui_base.cpp
@@ -1,6 +1,19 @@
 #include "ui_base.h"
 
+#include "system_headers.h"
+
 namespace cru {
     namespace ui {
-	}
+        bool IsKeyDown(const int virtual_code)
+        {
+            const auto result = ::GetKeyState(virtual_code);
+            return (static_cast<unsigned short>(result) & 0x8000) != 0;
+        }
+
+        bool IsKeyToggled(const int virtual_code)
+        {
+            const auto result = ::GetKeyState(virtual_code);
+            return (static_cast<unsigned short>(result) & 1) != 0;
+        }
+    }
 }