Sweden-Number/dlls/comctl32/theme_scrollbar.c

587 lines
19 KiB
C

/*
* Theming - Scrollbar control
*
* Copyright (c) 2015 Mark Harmstone
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "uxtheme.h"
#include "vssym32.h"
#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
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 */
};
static HWND tracking_win = 0;
static enum SCROLL_HITTEST tracking_hot_part = SCROLL_NOWHERE;
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 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 redraw_part(HWND hwnd, HTHEME theme, enum SCROLL_HITTEST part)
{
DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
BOOL vertical = style & SBS_VERT;
SIZE sz;
RECT r, partrect;
unsigned int size, upsize, downsize;
if (part == SCROLL_NOWHERE) { /* redraw everything */
InvalidateRect(hwnd, NULL, TRUE);
return;
}
GetWindowRect(hwnd, &r);
OffsetRect(&r, -r.left, -r.top);
if (vertical) {
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 {
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 (size < SCROLL_MIN_RECT + upsize + downsize)
upsize = downsize = (size - SCROLL_MIN_RECT)/2;
partrect = r;
if (part == SCROLL_TOP_ARROW) {
if (vertical)
partrect.bottom = partrect.top + upsize;
else
partrect.right = partrect.left + upsize;
} else if (part == SCROLL_BOTTOM_ARROW) {
if (vertical)
partrect.top = partrect.bottom - downsize;
else
partrect.left = partrect.right - downsize;
} else {
unsigned int thumbpos, thumbsize;
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
if (!GetScrollInfo(hwnd, SB_CTL, &si)) {
WARN("GetScrollInfo failed.\n");
return;
}
calc_thumb_dimensions(size - upsize - downsize, &si, &thumbpos, &thumbsize);
if (part == SCROLL_TOP_RECT) {
if (vertical) {
partrect.top = r.top + upsize;
partrect.bottom = partrect.top + thumbpos;
} else {
partrect.left = r.left + upsize;
partrect.right = partrect.left + thumbpos;
}
} else if (part == SCROLL_THUMB) {
if (vertical) {
partrect.top = r.top + upsize + thumbpos;
partrect.bottom = partrect.top + thumbsize;
} else {
partrect.left = r.left + upsize + thumbpos;
partrect.right = partrect.left + thumbsize;
}
} else if (part == SCROLL_BOTTOM_RECT) {
if (vertical) {
partrect.top = r.top + upsize + thumbpos + thumbsize;
partrect.bottom = r.bottom - downsize;
} else {
partrect.left = r.left + upsize + thumbpos + thumbsize;
partrect.right = r.right - downsize;
}
}
}
InvalidateRect(hwnd, &partrect, TRUE);
}
static void scroll_event(HWND hwnd, HTHEME theme, UINT msg, POINT pt)
{
enum SCROLL_HITTEST hittest;
TRACKMOUSEEVENT tme;
if (GetWindowLongW(hwnd, GWL_STYLE) & (SBS_SIZEGRIP | SBS_SIZEBOX))
return;
hittest = hit_test(hwnd, theme, pt);
switch (msg)
{
case WM_MOUSEMOVE:
hittest = hit_test(hwnd, theme, pt);
tracking_win = hwnd;
break;
case WM_MOUSELEAVE:
if (tracking_win == hwnd) {
hittest = SCROLL_NOWHERE;
}
break;
}
tme.cbSize = sizeof(tme);
tme.dwFlags = TME_QUERY;
TrackMouseEvent(&tme);
if (!(tme.dwFlags & TME_LEAVE) || tme.hwndTrack != hwnd) {
tme.dwFlags = TME_LEAVE;
tme.hwndTrack = hwnd;
TrackMouseEvent(&tme);
}
if (tracking_win != hwnd && msg == WM_MOUSELEAVE) {
redraw_part(hwnd, theme, SCROLL_NOWHERE);
return;
}
if (tracking_win == hwnd && hittest != tracking_hot_part) {
enum SCROLL_HITTEST oldhotpart = tracking_hot_part;
tracking_hot_part = hittest;
if (hittest != SCROLL_NOWHERE)
redraw_part(hwnd, theme, hittest);
else
tracking_win = 0;
if (oldhotpart != SCROLL_NOWHERE)
redraw_part(hwnd, theme, oldhotpart);
}
}
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;
if (IsThemeBackgroundPartiallyTransparent(theme, SBP_SIZEBOX, state))
DrawThemeParentBackground(hwnd, dc, NULL);
DrawThemeBackground(theme, dc, SBP_SIZEBOX, state, &r, NULL);
} else {
SCROLLINFO si;
unsigned int thumbpos, thumbsize;
int uppertrackstate, lowertrackstate, thumbstate;
RECT partrect, trackrect;
SIZE grippersize;
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 (tracking_win == hwnd) {
if (tracking_hot_part == SCROLL_TOP_RECT)
uppertrackstate = SCRBS_HOT;
else if (tracking_hot_part == SCROLL_BOTTOM_RECT)
lowertrackstate = SCRBS_HOT;
else if (tracking_hot_part == SCROLL_THUMB)
thumbstate = SCRBS_HOT;
}
}
DrawThemeParentBackground(hwnd, dc, NULL);
if (vertical) {
SIZE upsize, downsize;
int uparrowstate, downarrowstate;
if (disabled) {
uparrowstate = ABS_UPDISABLED;
downarrowstate = ABS_DOWNDISABLED;
} else {
uparrowstate = ABS_UPNORMAL;
downarrowstate = ABS_DOWNNORMAL;
if (tracking_win == hwnd) {
if (tracking_hot_part == SCROLL_TOP_ARROW)
uparrowstate = ABS_UPHOT;
else if (tracking_hot_part == SCROLL_BOTTOM_ARROW)
downarrowstate = ABS_DOWNHOT;
}
}
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 (tracking_win == hwnd) {
if (tracking_hot_part == SCROLL_TOP_ARROW)
leftarrowstate = ABS_LEFTHOT;
else if (tracking_hot_part == SCROLL_BOTTOM_ARROW)
rightarrowstate = ABS_RIGHTHOT;
}
}
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)
{
const WCHAR* themeClass = WC_SCROLLBARW;
HTHEME theme;
LRESULT result;
POINT pt;
TRACE("(%p, 0x%x, %lu, %lu, %lu)\n", hwnd, msg, wParam, lParam, dwRefData);
switch (msg) {
case WM_CREATE:
result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
OpenThemeData(hwnd, themeClass);
return result;
case WM_DESTROY:
theme = GetWindowTheme(hwnd);
CloseThemeData(theme);
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
case WM_THEMECHANGED:
theme = GetWindowTheme(hwnd);
CloseThemeData(theme);
OpenThemeData(hwnd, themeClass);
InvalidateRect(hwnd, NULL, TRUE);
break;
case WM_SYSCOLORCHANGE:
theme = GetWindowTheme(hwnd);
if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
/* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
* 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;
case WM_MOUSEMOVE:
case WM_MOUSELEAVE:
theme = GetWindowTheme(hwnd);
if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
pt.x = (short)LOWORD(lParam);
pt.y = (short)HIWORD(lParam);
scroll_event(hwnd, theme, msg, pt);
break;
default:
return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
}
return 0;
}