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Preventing flicker when typing with Text & Label tools.

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This commit is contained in:
William Kendrick 2010-02-10 22:46:37 +00:00
parent 978effa1f4
commit ba366043e0
2 changed files with 23 additions and 9 deletions
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4
docs/CHANGES.txt
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@ -8,7 +8,7 @@ http://www.tuxpaint.org/
$Id$
2009.February.8 (0.9.22)
2009.February.10 (0.9.22)
* New Tools:
----------
* Label - A tool to add text to a drawing, which can be modified or
@ -90,6 +90,8 @@ $Id$
needing to consult the man page, 'Options' documentation, or --usage
output).
* Text (and Label) tool doesn't flicker when typing or erasing text.
* New Starters:
-------------
* Elephant

28
src/tuxpaint.c
View file

@ -870,8 +870,7 @@ static int disable_label = 1;
static int disable_label;
#endif
/* Update the screen with the new canvas: */
static void update_canvas(int x1, int y1, int x2, int y2)
static void update_canvas_ex(int x1, int y1, int x2, int y2, int screen_too)
{
SDL_Rect src, dest;
@ -900,7 +899,14 @@ static void update_canvas(int x1, int y1, int x2, int y2)
if(!disable_label)
SDL_BlitSurface(label, NULL, screen, &r_label);
update_screen(x1 + 96, y1, x2 + 96, y2);
if (screen_too)
update_screen(x1 + 96, y1, x2 + 96, y2);
}
/* Update the screen with the new canvas: */
static void update_canvas(int x1, int y1, int x2, int y2)
{
update_canvas_ex(x1, y1, x2, y1, 1);
}
@ -14794,7 +14800,10 @@ static void do_render_cur_text(int do_blit)
SDL_Surface *tmp_surf;
SDL_Rect dest, src;
wchar_t *str;
hide_blinking_cursor();
/* I THINK this is unnecessary to call here; trying to prevent flicker when typing -bjk 2010.02.10 */
/* hide_blinking_cursor(); */
/* Keep cursor on the screen! */
@ -14861,10 +14870,13 @@ static void do_render_cur_text(int do_blit)
old_cursor_x + 1 + TuxPaint_Font_FontHeight(getfonthandle(cur_font)),
old_cursor_y + 1 + TuxPaint_Font_FontHeight(getfonthandle(cur_font)));
/* FIXME: Do less flickery updating here (use update_canvas_ex() above, then SDL_Flip() or SDL_UpdateRect() here -bjk 2010.02.10 */
old_cursor_x = cursor_x;
old_cursor_y = cursor_y;
cursor_textwidth = 0;
}
SDL_Flip(screen);
return;
}
@ -14872,10 +14884,10 @@ static void do_render_cur_text(int do_blit)
if (!do_blit)
{
update_canvas(cursor_x - 1,
update_canvas_ex(cursor_x - 1,
cursor_y - 1,
cursor_x + 1 + TuxPaint_Font_FontHeight(getfonthandle(cur_font)) * 3,
cursor_y + 1 + TuxPaint_Font_FontHeight(getfonthandle(cur_font)));
cursor_y + 1 + TuxPaint_Font_FontHeight(getfonthandle(cur_font)), 0);
/* Draw outline around text: */
@ -14968,8 +14980,8 @@ static void do_render_cur_text(int do_blit)
{
SDL_BlitSurface(tmp_surf, &src, canvas, &dest);
}
update_canvas(dest.x, dest.y, dest.x + tmp_surf->w,
dest.y + tmp_surf->h);
update_canvas_ex(dest.x, dest.y, dest.x + tmp_surf->w,
dest.y + tmp_surf->h, 0);
}
else
{