diff options
Diffstat (limited to 'src/fl_scroll_area.cxx')
| -rw-r--r-- | src/fl_scroll_area.cxx | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/src/fl_scroll_area.cxx b/src/fl_scroll_area.cxx index b58e3e8c6..373a8f70e 100644 --- a/src/fl_scroll_area.cxx +++ b/src/fl_scroll_area.cxx @@ -1,5 +1,5 @@ // -// "$Id: fl_scroll_area.cxx,v 1.4.2.3.2.4 2003/01/30 21:44:12 easysw Exp $" +// "$Id: fl_scroll_area.cxx,v 1.4.2.3.2.5 2004/04/11 01:40:12 easysw Exp $" // // Scrolling routines for the Fast Light Tool Kit (FLTK). // @@ -27,6 +27,7 @@ // a "callback" which is called to draw rectangular areas that are moved // into the drawing area. +#include <FL/Fl.H> #include <FL/x.H> // scroll a rectangle and redraw the newly exposed portions: @@ -71,6 +72,36 @@ void fl_scroll(int X, int Y, int W, int H, int dx, int dy, BitBlt(fl_gc, dest_x, dest_y, src_w, src_h, fl_gc, src_x, src_y,SRCCOPY); // NYI: need to redraw areas that the source of BitBlt was bad due to // overlapped windows, probably similar to X version: + // MRS: basic code needs to redraw parts that scrolled from off-screen... + int temp, limit; + int wx, wy; + + // Compute the X position of the current window; + // this only works when scrolling in response to + // a user event; Fl_Window::x/y_root() do not work + // on WIN32... + wx = Fl::event_x_root() - Fl::event_x(); + wy = Fl::event_y_root() - Fl::event_y(); + + temp = wx + src_x; + if (temp < Fl::x()) { + draw_area(data, dest_x, dest_y, Fl::x() - temp, src_h); + } + temp = wx + src_x + src_w; + limit = Fl::x() + Fl::w(); + if (temp > limit) { + draw_area(data, dest_x + src_w - temp + limit, dest_y, temp - limit, src_h); + } + + temp = wy + src_y; + if (temp < Fl::y()) { + draw_area(data, dest_x, dest_y, src_w, Fl::y() - temp); + } + temp = wy + src_y + src_h; + limit = Fl::y() + Fl::h(); + if (temp > limit) { + draw_area(data, dest_x, dest_y + src_h - temp + limit, src_w, temp - limit); + } #elif defined(__APPLE__) Rect src = { src_y, src_x, src_y+src_h, src_x+src_w }; Rect dst = { dest_y, dest_x, dest_y+src_h, dest_x+src_w }; @@ -96,5 +127,5 @@ void fl_scroll(int X, int Y, int W, int H, int dx, int dy, } // -// End of "$Id: fl_scroll_area.cxx,v 1.4.2.3.2.4 2003/01/30 21:44:12 easysw Exp $". +// End of "$Id: fl_scroll_area.cxx,v 1.4.2.3.2.5 2004/04/11 01:40:12 easysw Exp $". // |