diff options
Diffstat (limited to 'win32/ScintillaWin.cxx')
| -rw-r--r-- | win32/ScintillaWin.cxx | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/win32/ScintillaWin.cxx b/win32/ScintillaWin.cxx index cd56105d0..28b6e950c 100644 --- a/win32/ScintillaWin.cxx +++ b/win32/ScintillaWin.cxx @@ -269,6 +269,37 @@ public: class GlobalMemory; +class ReverseArrowCursor { + UINT dpi = USER_DEFAULT_SCREEN_DPI; + HCURSOR cursor {}; + +public: + ReverseArrowCursor() noexcept {} + // Deleted so ReverseArrowCursor objects can not be copied. + ReverseArrowCursor(const ReverseArrowCursor &) = delete; + ReverseArrowCursor(ReverseArrowCursor &&) = delete; + ReverseArrowCursor &operator=(const ReverseArrowCursor &) = delete; + ReverseArrowCursor &operator=(ReverseArrowCursor &&) = delete; + ~ReverseArrowCursor() { + if (cursor) { + ::DestroyCursor(cursor); + } + } + + HCURSOR Load(UINT dpi_) noexcept { + if (cursor) { + if (dpi == dpi_) { + return cursor; + } + ::DestroyCursor(cursor); + } + + dpi = dpi_; + cursor = LoadReverseArrowCursor(dpi_); + return cursor ? cursor : ::LoadCursor({}, IDC_ARROW); + } +}; + } /** @@ -287,6 +318,7 @@ class ScintillaWin : int wheelDelta; ///< Wheel delta from roll UINT dpi = USER_DEFAULT_SCREEN_DPI; + ReverseArrowCursor reverseArrowCursor; HRGN hRgnUpdate; @@ -336,6 +368,7 @@ class ScintillaWin : enum : UINT_PTR { invalidTimerID, standardTimerID, idleTimerID, fineTimerStart }; + void DisplayCursor(Window::Cursor c) override; bool DragThreshold(Point ptStart, Point ptNow) override; void StartDrag() override; static int MouseModifiers(uptr_t wParam) noexcept; @@ -654,6 +687,17 @@ HWND ScintillaWin::MainHWND() const noexcept { return HwndFromWindow(wMain); } +void ScintillaWin::DisplayCursor(Window::Cursor c) { + if (cursorMode != SC_CURSORNORMAL) { + c = static_cast<Window::Cursor>(cursorMode); + } + if (c == Window::cursorReverseArrow) { + ::SetCursor(reverseArrowCursor.Load(dpi)); + } else { + wMain.SetCursor(c); + } +} + bool ScintillaWin::DragThreshold(Point ptStart, Point ptNow) { const Point ptDifference = ptStart - ptNow; const XYPOSITION xMove = std::trunc(std::abs(ptDifference.x)); |