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comctl32: Add hit testing for themed scrollbars.

This commit is contained in:
Mark Harmstone 2015-03-03 21:56:31 +00:00 committed by Alexandre Julliard
parent f623042fb9
commit d9708ecb93
1 changed files with 83 additions and 0 deletions
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83
dlls/comctl32/theme_scrollbar.c
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@ -38,6 +38,16 @@
/* Minimum size of the rectangle between the arrows */
#define SCROLL_MIN_RECT 4
enum SCROLL_HITTEST
{
SCROLL_NOWHERE, /* Outside the scroll bar */
SCROLL_TOP_ARROW, /* Top or left arrow */
SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
SCROLL_THUMB, /* Thumb rectangle */
SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
};
WINE_DEFAULT_DEBUG_CHANNEL(theme_scroll);
static void calc_thumb_dimensions(unsigned int size, SCROLLINFO *si, unsigned int *thumbpos, unsigned int *thumbsize)
@ -66,6 +76,79 @@ static void calc_thumb_dimensions(unsigned int size, SCROLLINFO *si, unsigned in
}
}
static enum SCROLL_HITTEST hit_test(HWND hwnd, HTHEME theme, POINT pt)
{
RECT r;
DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
BOOL vertical = style & SBS_VERT;
SIZE sz;
SCROLLINFO si;
unsigned int offset, size, upsize, downsize, thumbpos, thumbsize;
GetWindowRect(hwnd, &r);
OffsetRect(&r, -r.left, -r.top);
if (vertical) {
offset = pt.y;
size = r.bottom;
if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_UPNORMAL, NULL, TS_DRAW, &sz))) {
WARN("Could not get up arrow size.\n");
upsize = 0;
} else
upsize = sz.cy;
if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_DOWNNORMAL, NULL, TS_DRAW, &sz))) {
WARN("Could not get down arrow size.\n");
downsize = 0;
} else
downsize = sz.cy;
} else {
offset = pt.x;
size = r.right;
if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_LEFTNORMAL, NULL, TS_DRAW, &sz))) {
WARN("Could not get left arrow size.\n");
upsize = 0;
} else
upsize = sz.cx;
if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_RIGHTNORMAL, NULL, TS_DRAW, &sz))) {
WARN("Could not get right arrow size.\n");
downsize = 0;
} else
downsize = sz.cx;
}
if (pt.x < 0 || pt.x > r.right || pt.y < 0 || pt.y > r.bottom)
return SCROLL_NOWHERE;
if (size < SCROLL_MIN_RECT + upsize + downsize)
upsize = downsize = (size - SCROLL_MIN_RECT)/2;
if (offset < upsize)
return SCROLL_TOP_ARROW;
if (offset > size - downsize)
return SCROLL_BOTTOM_ARROW;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
if (!GetScrollInfo(hwnd, SB_CTL, &si)) {
WARN("GetScrollInfo failed.\n");
return SCROLL_NOWHERE;
}
calc_thumb_dimensions(size - upsize - downsize, &si, &thumbpos, &thumbsize);
if (offset < upsize + thumbpos)
return SCROLL_TOP_RECT;
else if (offset < upsize + thumbpos + thumbsize)
return SCROLL_THUMB;
else
return SCROLL_BOTTOM_RECT;
}
static void paint_scrollbar(HWND hwnd, HTHEME theme)
{
HDC dc;