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comctl32: Paint themed scrollbars.

This commit is contained in:
Mark Harmstone 2015-03-03 07:44:42 +00:00 committed by Alexandre Julliard
parent b472e5574c
commit d7c2069721
1 changed files with 231 additions and 0 deletions
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231
dlls/comctl32/theme_scrollbar.c
View File

@ -32,8 +32,232 @@
#include "comctl32.h"
#include "wine/debug.h"
/* Minimum size of the thumb in pixels */
#define SCROLL_MIN_THUMB 6
/* Minimum size of the rectangle between the arrows */
#define SCROLL_MIN_RECT 4
WINE_DEFAULT_DEBUG_CHANNEL(theme_scroll);
static void calc_thumb_dimensions(unsigned int size, SCROLLINFO *si, unsigned int *thumbpos, unsigned int *thumbsize)
{
if (size <= SCROLL_MIN_RECT)
*thumbpos = *thumbsize = 0;
else if (si->nPage > si->nMax - si->nMin)
*thumbpos = *thumbsize = 0;
else {
if (si->nPage > 0) {
*thumbsize = MulDiv(size, si->nPage, si->nMax - si->nMin + 1);
if (*thumbsize < SCROLL_MIN_THUMB) *thumbsize = SCROLL_MIN_THUMB;
}
else *thumbsize = GetSystemMetrics(SM_CXVSCROLL);
if (size < *thumbsize)
*thumbpos = *thumbsize = 0;
else {
int max = si->nMax - max(si->nPage - 1, 0);
size -= *thumbsize;
if (si->nMin >= max)
*thumbpos = 0;
else
*thumbpos = MulDiv(size, si->nTrackPos - si->nMin, max - si->nMin);
}
}
}
static void paint_scrollbar(HWND hwnd, HTHEME theme)
{
HDC dc;
PAINTSTRUCT ps;
RECT r;
DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
BOOL vertical = style & SBS_VERT;
BOOL disabled = !IsWindowEnabled(hwnd);
GetWindowRect(hwnd, &r);
OffsetRect(&r, -r.left, -r.top);
dc = BeginPaint(hwnd, &ps);
if (style & SBS_SIZEBOX || style & SBS_SIZEGRIP) {
int state;
if (style & SBS_SIZEBOXTOPLEFTALIGN)
state = SZB_TOPLEFTALIGN;
else
state = SZB_RIGHTALIGN;
DrawThemeBackground(theme, dc, SBP_SIZEBOX, state, &r, NULL);
} else {
SCROLLBARINFO sbi;
SCROLLINFO si;
unsigned int thumbpos, thumbsize;
int uppertrackstate, lowertrackstate, thumbstate;
RECT partrect, trackrect;
SIZE grippersize;
sbi.cbSize = sizeof(sbi);
GetScrollBarInfo(hwnd, OBJID_CLIENT, &sbi);
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetScrollInfo(hwnd, SB_CTL, &si);
trackrect = r;
if (disabled) {
uppertrackstate = SCRBS_DISABLED;
lowertrackstate = SCRBS_DISABLED;
thumbstate = SCRBS_DISABLED;
} else {
uppertrackstate = SCRBS_NORMAL;
lowertrackstate = SCRBS_NORMAL;
thumbstate = SCRBS_NORMAL;
}
if (vertical) {
SIZE upsize, downsize;
int uparrowstate, downarrowstate;
if (disabled) {
uparrowstate = ABS_UPDISABLED;
downarrowstate = ABS_DOWNDISABLED;
} else {
uparrowstate = ABS_UPNORMAL;
downarrowstate = ABS_DOWNNORMAL;
}
if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, uparrowstate, NULL, TS_DRAW, &upsize))) {
WARN("Could not get up arrow size.\n");
return;
}
if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, downarrowstate, NULL, TS_DRAW, &downsize))) {
WARN("Could not get down arrow size.\n");
return;
}
if (r.bottom - r.top - upsize.cy - downsize.cy < SCROLL_MIN_RECT)
upsize.cy = downsize.cy = (r.bottom - r.top - SCROLL_MIN_RECT)/2;
partrect = r;
partrect.bottom = partrect.top + upsize.cy;
DrawThemeBackground(theme, dc, SBP_ARROWBTN, uparrowstate, &partrect, NULL);
trackrect.top = partrect.bottom;
partrect.bottom = r.bottom;
partrect.top = partrect.bottom - downsize.cy;
DrawThemeBackground(theme, dc, SBP_ARROWBTN, downarrowstate, &partrect, NULL);
trackrect.bottom = partrect.top;
calc_thumb_dimensions(trackrect.bottom - trackrect.top, &si, &thumbpos, &thumbsize);
if (thumbpos > 0) {
partrect.top = trackrect.top;
partrect.bottom = partrect.top + thumbpos;
DrawThemeBackground(theme, dc, SBP_UPPERTRACKVERT, uppertrackstate, &partrect, NULL);
}
if (thumbsize > 0) {
partrect.top = trackrect.top + thumbpos;
partrect.bottom = partrect.top + thumbsize;
DrawThemeBackground(theme, dc, SBP_THUMBBTNVERT, thumbstate, &partrect, NULL);
if (SUCCEEDED(GetThemePartSize(theme, dc, SBP_GRIPPERVERT, thumbstate, NULL, TS_DRAW, &grippersize))) {
MARGINS margins;
if (SUCCEEDED(GetThemeMargins(theme, dc, SBP_THUMBBTNVERT, thumbstate, TMT_CONTENTMARGINS, &partrect, &margins))) {
if (grippersize.cy <= (thumbsize - margins.cyTopHeight - margins.cyBottomHeight))
DrawThemeBackground(theme, dc, SBP_GRIPPERVERT, thumbstate, &partrect, NULL);
}
}
}
if (thumbpos + thumbsize < trackrect.bottom - trackrect.top) {
partrect.bottom = trackrect.bottom;
partrect.top = trackrect.top + thumbsize + thumbpos;
DrawThemeBackground(theme, dc, SBP_LOWERTRACKVERT, lowertrackstate, &partrect, NULL);
}
} else {
SIZE leftsize, rightsize;
int leftarrowstate, rightarrowstate;
if (disabled) {
leftarrowstate = ABS_LEFTDISABLED;
rightarrowstate = ABS_RIGHTDISABLED;
} else {
leftarrowstate = ABS_LEFTNORMAL;
rightarrowstate = ABS_RIGHTNORMAL;
}
if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, leftarrowstate, NULL, TS_DRAW, &leftsize))) {
WARN("Could not get left arrow size.\n");
return;
}
if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, rightarrowstate, NULL, TS_DRAW, &rightsize))) {
WARN("Could not get right arrow size.\n");
return;
}
if (r.right - r.left - leftsize.cx - rightsize.cx < SCROLL_MIN_RECT)
leftsize.cx = rightsize.cx = (r.right - r.left - SCROLL_MIN_RECT)/2;
partrect = r;
partrect.right = partrect.left + leftsize.cx;
DrawThemeBackground(theme, dc, SBP_ARROWBTN, leftarrowstate, &partrect, NULL);
trackrect.left = partrect.right;
partrect.right = r.right;
partrect.left = partrect.right - rightsize.cx;
DrawThemeBackground(theme, dc, SBP_ARROWBTN, rightarrowstate, &partrect, NULL);
trackrect.right = partrect.left;
calc_thumb_dimensions(trackrect.right - trackrect.left, &si, &thumbpos, &thumbsize);
if (thumbpos > 0) {
partrect.left = trackrect.left;
partrect.right = partrect.left + thumbpos;
DrawThemeBackground(theme, dc, SBP_UPPERTRACKHORZ, uppertrackstate, &partrect, NULL);
}
if (thumbsize > 0) {
partrect.left = trackrect.left + thumbpos;
partrect.right = partrect.left + thumbsize;
DrawThemeBackground(theme, dc, SBP_THUMBBTNHORZ, thumbstate, &partrect, NULL);
if (SUCCEEDED(GetThemePartSize(theme, dc, SBP_GRIPPERHORZ, thumbstate, NULL, TS_DRAW, &grippersize))) {
MARGINS margins;
if (SUCCEEDED(GetThemeMargins(theme, dc, SBP_THUMBBTNHORZ, thumbstate, TMT_CONTENTMARGINS, &partrect, &margins))) {
if (grippersize.cx <= (thumbsize - margins.cxLeftWidth - margins.cxRightWidth))
DrawThemeBackground(theme, dc, SBP_GRIPPERHORZ, thumbstate, &partrect, NULL);
}
}
}
if (thumbpos + thumbsize < trackrect.right - trackrect.left) {
partrect.right = trackrect.right;
partrect.left = trackrect.left + thumbsize + thumbpos;
DrawThemeBackground(theme, dc, SBP_LOWERTRACKHORZ, lowertrackstate, &partrect, NULL);
}
}
}
EndPaint(hwnd, &ps);
}
LRESULT CALLBACK THEMING_ScrollbarSubclassProc (HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam,
ULONG_PTR dwRefData)
@ -68,6 +292,13 @@ LRESULT CALLBACK THEMING_ScrollbarSubclassProc (HWND hwnd, UINT msg,
* which will do the repaint. */
break;
case WM_PAINT:
theme = GetWindowTheme(hwnd);
if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
paint_scrollbar(hwnd, theme);
break;
default:
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
}