582 lines
19 KiB
C
582 lines
19 KiB
C
/*
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* Theming - Scrollbar control
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*
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* Copyright (c) 2015 Mark Harmstone
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*/
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#include <stdarg.h>
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#include <string.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "uxtheme.h"
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#include "vssym32.h"
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#include "comctl32.h"
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#include "wine/debug.h"
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/* Minimum size of the thumb in pixels */
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#define SCROLL_MIN_THUMB 6
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/* Minimum size of the rectangle between the arrows */
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#define SCROLL_MIN_RECT 4
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enum SCROLL_HITTEST
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{
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SCROLL_NOWHERE, /* Outside the scroll bar */
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SCROLL_TOP_ARROW, /* Top or left arrow */
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SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */
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SCROLL_THUMB, /* Thumb rectangle */
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SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */
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SCROLL_BOTTOM_ARROW /* Bottom or right arrow */
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};
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static HWND tracking_win = 0;
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static enum SCROLL_HITTEST tracking_hot_part = SCROLL_NOWHERE;
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WINE_DEFAULT_DEBUG_CHANNEL(theme_scroll);
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static void calc_thumb_dimensions(unsigned int size, SCROLLINFO *si, unsigned int *thumbpos, unsigned int *thumbsize)
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{
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if (size <= SCROLL_MIN_RECT)
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*thumbpos = *thumbsize = 0;
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else if (si->nPage > si->nMax - si->nMin)
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*thumbpos = *thumbsize = 0;
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else {
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if (si->nPage > 0) {
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*thumbsize = MulDiv(size, si->nPage, si->nMax - si->nMin + 1);
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if (*thumbsize < SCROLL_MIN_THUMB) *thumbsize = SCROLL_MIN_THUMB;
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}
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else *thumbsize = GetSystemMetrics(SM_CXVSCROLL);
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if (size < *thumbsize)
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*thumbpos = *thumbsize = 0;
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else {
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int max = si->nMax - max(si->nPage - 1, 0);
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size -= *thumbsize;
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if (si->nMin >= max)
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*thumbpos = 0;
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else
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*thumbpos = MulDiv(size, si->nTrackPos - si->nMin, max - si->nMin);
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}
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}
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}
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static enum SCROLL_HITTEST hit_test(HWND hwnd, HTHEME theme, POINT pt)
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{
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RECT r;
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DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
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BOOL vertical = style & SBS_VERT;
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SIZE sz;
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SCROLLINFO si;
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unsigned int offset, size, upsize, downsize, thumbpos, thumbsize;
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GetWindowRect(hwnd, &r);
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OffsetRect(&r, -r.left, -r.top);
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if (vertical) {
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offset = pt.y;
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size = r.bottom;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_UPNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get up arrow size.\n");
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upsize = 0;
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} else
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upsize = sz.cy;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_DOWNNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get down arrow size.\n");
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downsize = 0;
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} else
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downsize = sz.cy;
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} else {
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offset = pt.x;
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size = r.right;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_LEFTNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get left arrow size.\n");
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upsize = 0;
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} else
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upsize = sz.cx;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_RIGHTNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get right arrow size.\n");
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downsize = 0;
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} else
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downsize = sz.cx;
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}
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if (pt.x < 0 || pt.x > r.right || pt.y < 0 || pt.y > r.bottom)
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return SCROLL_NOWHERE;
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if (size < SCROLL_MIN_RECT + upsize + downsize)
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upsize = downsize = (size - SCROLL_MIN_RECT)/2;
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if (offset < upsize)
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return SCROLL_TOP_ARROW;
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if (offset > size - downsize)
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return SCROLL_BOTTOM_ARROW;
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si.cbSize = sizeof(si);
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si.fMask = SIF_ALL;
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if (!GetScrollInfo(hwnd, SB_CTL, &si)) {
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WARN("GetScrollInfo failed.\n");
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return SCROLL_NOWHERE;
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}
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calc_thumb_dimensions(size - upsize - downsize, &si, &thumbpos, &thumbsize);
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if (offset < upsize + thumbpos)
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return SCROLL_TOP_RECT;
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else if (offset < upsize + thumbpos + thumbsize)
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return SCROLL_THUMB;
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else
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return SCROLL_BOTTOM_RECT;
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}
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static void redraw_part(HWND hwnd, HTHEME theme, enum SCROLL_HITTEST part)
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{
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DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
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BOOL vertical = style & SBS_VERT;
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SIZE sz;
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RECT r, partrect;
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unsigned int size, upsize, downsize;
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if (part == SCROLL_NOWHERE) { /* redraw everything */
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InvalidateRect(hwnd, NULL, TRUE);
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return;
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}
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GetWindowRect(hwnd, &r);
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OffsetRect(&r, -r.left, -r.top);
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if (vertical) {
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size = r.bottom;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_UPNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get up arrow size.\n");
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upsize = 0;
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} else
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upsize = sz.cy;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_DOWNNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get down arrow size.\n");
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downsize = 0;
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} else
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downsize = sz.cy;
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} else {
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size = r.right;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_LEFTNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get left arrow size.\n");
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upsize = 0;
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} else
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upsize = sz.cx;
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if (FAILED(GetThemePartSize(theme, NULL, SBP_ARROWBTN, ABS_RIGHTNORMAL, NULL, TS_DRAW, &sz))) {
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WARN("Could not get right arrow size.\n");
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downsize = 0;
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} else
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downsize = sz.cx;
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}
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if (size < SCROLL_MIN_RECT + upsize + downsize)
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upsize = downsize = (size - SCROLL_MIN_RECT)/2;
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partrect = r;
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if (part == SCROLL_TOP_ARROW) {
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if (vertical)
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partrect.bottom = partrect.top + upsize;
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else
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partrect.right = partrect.left + upsize;
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} else if (part == SCROLL_BOTTOM_ARROW) {
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if (vertical)
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partrect.top = partrect.bottom - downsize;
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else
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partrect.left = partrect.right - downsize;
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} else {
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unsigned int thumbpos, thumbsize;
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SCROLLINFO si;
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si.cbSize = sizeof(si);
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si.fMask = SIF_ALL;
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if (!GetScrollInfo(hwnd, SB_CTL, &si)) {
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WARN("GetScrollInfo failed.\n");
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return;
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}
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calc_thumb_dimensions(size - upsize - downsize, &si, &thumbpos, &thumbsize);
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if (part == SCROLL_TOP_RECT) {
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if (vertical) {
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partrect.top = r.top + upsize;
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partrect.bottom = partrect.top + thumbpos;
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} else {
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partrect.left = r.left + upsize;
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partrect.right = partrect.left + thumbpos;
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}
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} else if (part == SCROLL_THUMB) {
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if (vertical) {
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partrect.top = r.top + upsize + thumbpos;
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partrect.bottom = partrect.top + thumbsize;
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} else {
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partrect.left = r.left + upsize + thumbpos;
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partrect.right = partrect.left + thumbsize;
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}
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} else if (part == SCROLL_BOTTOM_RECT) {
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if (vertical) {
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partrect.top = r.top + upsize + thumbpos + thumbsize;
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partrect.bottom = r.bottom - downsize;
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} else {
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partrect.left = r.left + upsize + thumbpos + thumbsize;
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partrect.right = r.right - downsize;
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}
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}
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}
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InvalidateRect(hwnd, &partrect, TRUE);
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}
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static void scroll_event(HWND hwnd, HTHEME theme, UINT msg, POINT pt)
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{
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enum SCROLL_HITTEST hittest;
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TRACKMOUSEEVENT tme;
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if (GetWindowLongW(hwnd, GWL_STYLE) & (SBS_SIZEGRIP | SBS_SIZEBOX))
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return;
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hittest = hit_test(hwnd, theme, pt);
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switch (msg)
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{
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case WM_MOUSEMOVE:
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hittest = hit_test(hwnd, theme, pt);
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tracking_win = hwnd;
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break;
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case WM_MOUSELEAVE:
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if (tracking_win == hwnd) {
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hittest = SCROLL_NOWHERE;
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}
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break;
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}
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tme.cbSize = sizeof(tme);
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tme.dwFlags = TME_QUERY;
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TrackMouseEvent(&tme);
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if (!(tme.dwFlags & TME_LEAVE) || tme.hwndTrack != hwnd) {
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tme.dwFlags = TME_LEAVE;
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tme.hwndTrack = hwnd;
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TrackMouseEvent(&tme);
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}
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if (tracking_win != hwnd && msg == WM_MOUSELEAVE) {
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redraw_part(hwnd, theme, SCROLL_NOWHERE);
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return;
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}
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if (tracking_win == hwnd && hittest != tracking_hot_part) {
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enum SCROLL_HITTEST oldhotpart = tracking_hot_part;
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tracking_hot_part = hittest;
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if (hittest != SCROLL_NOWHERE)
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redraw_part(hwnd, theme, hittest);
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else
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tracking_win = 0;
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if (oldhotpart != SCROLL_NOWHERE)
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redraw_part(hwnd, theme, oldhotpart);
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}
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}
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static void paint_scrollbar(HWND hwnd, HTHEME theme)
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{
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HDC dc;
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PAINTSTRUCT ps;
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RECT r;
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DWORD style = GetWindowLongW(hwnd, GWL_STYLE);
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BOOL vertical = style & SBS_VERT;
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BOOL disabled = !IsWindowEnabled(hwnd);
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GetWindowRect(hwnd, &r);
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OffsetRect(&r, -r.left, -r.top);
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dc = BeginPaint(hwnd, &ps);
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if (style & SBS_SIZEBOX || style & SBS_SIZEGRIP) {
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int state;
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if (style & SBS_SIZEBOXTOPLEFTALIGN)
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state = SZB_TOPLEFTALIGN;
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else
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state = SZB_RIGHTALIGN;
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DrawThemeBackground(theme, dc, SBP_SIZEBOX, state, &r, NULL);
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} else {
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SCROLLINFO si;
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unsigned int thumbpos, thumbsize;
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int uppertrackstate, lowertrackstate, thumbstate;
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RECT partrect, trackrect;
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SIZE grippersize;
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si.cbSize = sizeof(si);
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si.fMask = SIF_ALL;
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GetScrollInfo(hwnd, SB_CTL, &si);
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trackrect = r;
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if (disabled) {
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uppertrackstate = SCRBS_DISABLED;
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lowertrackstate = SCRBS_DISABLED;
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thumbstate = SCRBS_DISABLED;
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} else {
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uppertrackstate = SCRBS_NORMAL;
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lowertrackstate = SCRBS_NORMAL;
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thumbstate = SCRBS_NORMAL;
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if (tracking_win == hwnd) {
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if (tracking_hot_part == SCROLL_TOP_RECT)
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uppertrackstate = SCRBS_HOT;
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else if (tracking_hot_part == SCROLL_BOTTOM_RECT)
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lowertrackstate = SCRBS_HOT;
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else if (tracking_hot_part == SCROLL_THUMB)
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thumbstate = SCRBS_HOT;
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}
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}
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if (vertical) {
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SIZE upsize, downsize;
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int uparrowstate, downarrowstate;
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if (disabled) {
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uparrowstate = ABS_UPDISABLED;
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downarrowstate = ABS_DOWNDISABLED;
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} else {
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uparrowstate = ABS_UPNORMAL;
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downarrowstate = ABS_DOWNNORMAL;
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if (tracking_win == hwnd) {
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if (tracking_hot_part == SCROLL_TOP_ARROW)
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uparrowstate = ABS_UPHOT;
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else if (tracking_hot_part == SCROLL_BOTTOM_ARROW)
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downarrowstate = ABS_DOWNHOT;
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}
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}
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if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, uparrowstate, NULL, TS_DRAW, &upsize))) {
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WARN("Could not get up arrow size.\n");
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return;
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}
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if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, downarrowstate, NULL, TS_DRAW, &downsize))) {
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WARN("Could not get down arrow size.\n");
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return;
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}
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if (r.bottom - r.top - upsize.cy - downsize.cy < SCROLL_MIN_RECT)
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upsize.cy = downsize.cy = (r.bottom - r.top - SCROLL_MIN_RECT)/2;
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partrect = r;
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partrect.bottom = partrect.top + upsize.cy;
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DrawThemeBackground(theme, dc, SBP_ARROWBTN, uparrowstate, &partrect, NULL);
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trackrect.top = partrect.bottom;
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partrect.bottom = r.bottom;
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partrect.top = partrect.bottom - downsize.cy;
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DrawThemeBackground(theme, dc, SBP_ARROWBTN, downarrowstate, &partrect, NULL);
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trackrect.bottom = partrect.top;
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calc_thumb_dimensions(trackrect.bottom - trackrect.top, &si, &thumbpos, &thumbsize);
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if (thumbpos > 0) {
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partrect.top = trackrect.top;
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partrect.bottom = partrect.top + thumbpos;
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DrawThemeBackground(theme, dc, SBP_UPPERTRACKVERT, uppertrackstate, &partrect, NULL);
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}
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if (thumbsize > 0) {
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partrect.top = trackrect.top + thumbpos;
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partrect.bottom = partrect.top + thumbsize;
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DrawThemeBackground(theme, dc, SBP_THUMBBTNVERT, thumbstate, &partrect, NULL);
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if (SUCCEEDED(GetThemePartSize(theme, dc, SBP_GRIPPERVERT, thumbstate, NULL, TS_DRAW, &grippersize))) {
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MARGINS margins;
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if (SUCCEEDED(GetThemeMargins(theme, dc, SBP_THUMBBTNVERT, thumbstate, TMT_CONTENTMARGINS, &partrect, &margins))) {
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if (grippersize.cy <= (thumbsize - margins.cyTopHeight - margins.cyBottomHeight))
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DrawThemeBackground(theme, dc, SBP_GRIPPERVERT, thumbstate, &partrect, NULL);
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}
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}
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}
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if (thumbpos + thumbsize < trackrect.bottom - trackrect.top) {
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partrect.bottom = trackrect.bottom;
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partrect.top = trackrect.top + thumbsize + thumbpos;
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DrawThemeBackground(theme, dc, SBP_LOWERTRACKVERT, lowertrackstate, &partrect, NULL);
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}
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} else {
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SIZE leftsize, rightsize;
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int leftarrowstate, rightarrowstate;
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if (disabled) {
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leftarrowstate = ABS_LEFTDISABLED;
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rightarrowstate = ABS_RIGHTDISABLED;
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} else {
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leftarrowstate = ABS_LEFTNORMAL;
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rightarrowstate = ABS_RIGHTNORMAL;
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if (tracking_win == hwnd) {
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if (tracking_hot_part == SCROLL_TOP_ARROW)
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leftarrowstate = ABS_LEFTHOT;
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else if (tracking_hot_part == SCROLL_BOTTOM_ARROW)
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rightarrowstate = ABS_RIGHTHOT;
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}
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}
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if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, leftarrowstate, NULL, TS_DRAW, &leftsize))) {
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WARN("Could not get left arrow size.\n");
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return;
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}
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if (FAILED(GetThemePartSize(theme, dc, SBP_ARROWBTN, rightarrowstate, NULL, TS_DRAW, &rightsize))) {
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WARN("Could not get right arrow size.\n");
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return;
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}
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if (r.right - r.left - leftsize.cx - rightsize.cx < SCROLL_MIN_RECT)
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leftsize.cx = rightsize.cx = (r.right - r.left - SCROLL_MIN_RECT)/2;
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partrect = r;
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partrect.right = partrect.left + leftsize.cx;
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DrawThemeBackground(theme, dc, SBP_ARROWBTN, leftarrowstate, &partrect, NULL);
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trackrect.left = partrect.right;
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partrect.right = r.right;
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partrect.left = partrect.right - rightsize.cx;
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DrawThemeBackground(theme, dc, SBP_ARROWBTN, rightarrowstate, &partrect, NULL);
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trackrect.right = partrect.left;
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calc_thumb_dimensions(trackrect.right - trackrect.left, &si, &thumbpos, &thumbsize);
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if (thumbpos > 0) {
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partrect.left = trackrect.left;
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partrect.right = partrect.left + thumbpos;
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|
|
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);
|
|
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;
|
|
}
|