From f01af9c4e6f1438cd1112cfff42f3837028c7846 Mon Sep 17 00:00:00 2001 From: Bram Moolenaar Date: Tue, 1 Mar 2022 16:02:26 +0000 Subject: patch 8.2.4486: MS-Windows GUI: slow scrolling with maximized window Problem: MS-Windows GUI: slow scrolling with maximized window. Solution: Use a better way to check the window is on screen. (Ken Takata, closes #9865) --- src/gui_w32.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'src/gui_w32.c') diff --git a/src/gui_w32.c b/src/gui_w32.c index ec6267178a..584e4ef3e6 100644 --- a/src/gui_w32.c +++ b/src/gui_w32.c @@ -3016,7 +3016,7 @@ is_point_onscreen(int x, int y) } /* - * Check if the whole area of the specified window is on-screen. + * Check if the whole client area of the specified window is on-screen. * * Note about DirectX: Windows 10 1809 or above no longer maintains image of * the window portion that is off-screen. Scrolling by DWriteContext_Scroll() @@ -3026,16 +3026,23 @@ is_point_onscreen(int x, int y) is_window_onscreen(HWND hwnd) { RECT rc; + POINT p1, p2; - GetWindowRect(hwnd, &rc); + GetClientRect(hwnd, &rc); + p1.x = rc.left; + p1.y = rc.top; + p2.x = rc.right - 1; + p2.y = rc.bottom - 1; + ClientToScreen(hwnd, &p1); + ClientToScreen(hwnd, &p2); - if (!is_point_onscreen(rc.left, rc.top)) + if (!is_point_onscreen(p1.x, p1.y)) return FALSE; - if (!is_point_onscreen(rc.left, rc.bottom)) + if (!is_point_onscreen(p1.x, p2.y)) return FALSE; - if (!is_point_onscreen(rc.right, rc.top)) + if (!is_point_onscreen(p2.x, p1.y)) return FALSE; - if (!is_point_onscreen(rc.right, rc.bottom)) + if (!is_point_onscreen(p2.x, p2.y)) return FALSE; return TRUE; } -- cgit v1.2.3