diff options
Diffstat (limited to 'wx+/dc.h')
| -rw-r--r-- | wx+/dc.h | 35 |
1 files changed, 18 insertions, 17 deletions
@@ -17,37 +17,38 @@ namespace zen { -/* - 1. wxDCClipper does *not* stack: another fix for yet another poor wxWidgets implementation +/* 1. wxDCClipper does *not* stack: another fix for yet another poor wxWidgets implementation - class RecursiveDcClipper - { - RecursiveDcClipper(wxDC& dc, const wxRect& r) - }; + class RecursiveDcClipper + { + RecursiveDcClipper(wxDC& dc, const wxRect& r) + }; 2. wxAutoBufferedPaintDC skips one pixel on left side when RTL layout is active: a fix for a poor wxWidgets implementation - class BufferedPaintDC - { - BufferedPaintDC(wxWindow& wnd, std::unique_ptr<wxBitmap>& buffer) - }; -*/ + class BufferedPaintDC + { + BufferedPaintDC(wxWindow& wnd, std::unique_ptr<wxBitmap>& buffer) + }; */ inline void clearArea(wxDC& dc, const wxRect& rect, const wxColor& col) { + if (rect.width > 0 && //clearArea() is surprisingly expensive + rect.height > 0) + { wxDCPenChanger dummy (dc, col); wxDCBrushChanger dummy2(dc, col); dc.DrawRectangle(rect); + } } -/* -Standard DPI: - Windows/Ubuntu: 96 x 96 - macOS: wxWidgets uses DIP (note: wxScreenDC().GetPPI() returns 72 x 72 which is a lie; looks like 96 x 96) -*/ +/* Standard DPI: + Windows/Ubuntu: 96 x 96 + macOS: wxWidgets uses DIP (note: wxScreenDC().GetPPI() returns 72 x 72 which is a lie; looks like 96 x 96) */ + inline int fastFromDIP(int d) //like wxWindow::FromDIP (but tied to primary monitor and buffered) { @@ -60,7 +61,7 @@ int fastFromDIP(int d) //like wxWindow::FromDIP (but tied to primary monitor and assert(wxTheApp); //only call after wxWidgets was initalized! static const int dpiY = wxScreenDC().GetPPI().y; //perf: buffering for calls to ::GetDeviceCaps() needed!? const int defaultDpi = 96; - return numeric::round(1.0 * d * dpiY / defaultDpi); + return 1.0 * d * dpiY / defaultDpi + 0.49 /*round values like 1.5 down, e.g. 1 pixel on 150% scale*/; #endif } |