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317 lines
10 KiB
C
317 lines
10 KiB
C
/*
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* Theming - Button control
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*
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* Copyright (c) 2008 by Reece H. Dunn
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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 "tmschema.h"
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#include "comctl32.h"
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#define BUTTON_TYPE 0x0f /* bit mask for the available button types */
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/* These are indices into a states array to determine the theme state for a given theme part. */
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typedef enum
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{
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STATE_NORMAL,
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STATE_DISABLED,
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STATE_HOT,
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STATE_PRESSED,
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STATE_DEFAULTED
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} ButtonState;
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typedef void (*pfThemedPaint)(HTHEME theme, HWND hwnd, HDC hdc, ButtonState drawState, UINT dtFlags);
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static UINT get_drawtext_flags(DWORD style, DWORD ex_style)
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{
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UINT flags = 0;
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if (style & BS_PUSHLIKE)
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style &= ~BUTTON_TYPE;
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if (!(style & BS_MULTILINE))
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flags |= DT_SINGLELINE;
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else
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flags |= DT_WORDBREAK;
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switch (style & BS_CENTER)
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{
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case BS_LEFT: flags |= DT_LEFT; break;
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case BS_RIGHT: flags |= DT_RIGHT; break;
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case BS_CENTER: flags |= DT_CENTER; break;
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default:
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flags |= ((style & BUTTON_TYPE) <= BS_DEFPUSHBUTTON)
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? DT_CENTER : DT_LEFT;
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}
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if (ex_style & WS_EX_RIGHT)
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flags = DT_RIGHT | (flags & ~(DT_LEFT | DT_CENTER));
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if ((style & BUTTON_TYPE) != BS_GROUPBOX)
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{
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switch (style & BS_VCENTER)
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{
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case BS_TOP: flags |= DT_TOP; break;
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case BS_BOTTOM: flags |= DT_BOTTOM; break;
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case BS_VCENTER: /* fall through */
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default: flags |= DT_VCENTER; break;
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}
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}
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else
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/* GroupBox's text is always single line and is top aligned. */
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flags |= DT_SINGLELINE | DT_TOP;
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return flags;
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}
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static inline WCHAR *get_button_text(HWND hwnd)
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{
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INT len = 512;
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WCHAR *text;
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text = HeapAlloc(GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR));
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if (text) InternalGetWindowText(hwnd, text, len + 1);
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return text;
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}
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static void PB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
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{
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static const int states[] = { PBS_NORMAL, PBS_DISABLED, PBS_HOT, PBS_PRESSED, PBS_DEFAULTED };
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RECT bgRect, textRect;
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HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
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HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
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int state = states[ drawState ];
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WCHAR *text = get_button_text(hwnd);
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GetClientRect(hwnd, &bgRect);
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GetThemeBackgroundContentRect(theme, hDC, BP_PUSHBUTTON, state, &bgRect, &textRect);
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if (IsThemeBackgroundPartiallyTransparent(theme, BP_PUSHBUTTON, state))
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DrawThemeParentBackground(hwnd, hDC, NULL);
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DrawThemeBackground(theme, hDC, BP_PUSHBUTTON, state, &bgRect, NULL);
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if (text)
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{
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DrawThemeText(theme, hDC, BP_PUSHBUTTON, state, text, lstrlenW(text), dtFlags, 0, &textRect);
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HeapFree(GetProcessHeap(), 0, text);
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}
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if (hPrevFont) SelectObject(hDC, hPrevFont);
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}
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static void CB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
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{
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static const int cb_states[3][5] =
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{
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{ CBS_UNCHECKEDNORMAL, CBS_UNCHECKEDDISABLED, CBS_UNCHECKEDHOT, CBS_UNCHECKEDPRESSED, CBS_UNCHECKEDNORMAL },
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{ CBS_CHECKEDNORMAL, CBS_CHECKEDDISABLED, CBS_CHECKEDHOT, CBS_CHECKEDPRESSED, CBS_CHECKEDNORMAL },
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{ CBS_MIXEDNORMAL, CBS_MIXEDDISABLED, CBS_MIXEDHOT, CBS_MIXEDPRESSED, CBS_MIXEDNORMAL }
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};
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static const int rb_states[2][5] =
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{
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{ RBS_UNCHECKEDNORMAL, RBS_UNCHECKEDDISABLED, RBS_UNCHECKEDHOT, RBS_UNCHECKEDPRESSED, RBS_UNCHECKEDNORMAL },
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{ RBS_CHECKEDNORMAL, RBS_CHECKEDDISABLED, RBS_CHECKEDHOT, RBS_CHECKEDPRESSED, RBS_CHECKEDNORMAL }
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};
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static const int cb_size = 13;
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RECT bgRect, textRect;
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HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
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HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
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LRESULT checkState = SendMessageW(hwnd, BM_GETCHECK, 0, 0);
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DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
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int part = ((dwStyle & BUTTON_TYPE) == BS_RADIOBUTTON) || ((dwStyle & BUTTON_TYPE) == BS_AUTORADIOBUTTON)
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? BP_RADIOBUTTON
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: BP_CHECKBOX;
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int state = (part == BP_CHECKBOX)
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? cb_states[ checkState ][ drawState ]
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: rb_states[ checkState ][ drawState ];
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WCHAR *text = get_button_text(hwnd);
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GetClientRect(hwnd, &bgRect);
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GetThemeBackgroundContentRect(theme, hDC, part, state, &bgRect, &textRect);
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if (dtFlags & DT_SINGLELINE) /* Center the checkbox / radio button to the text. */
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bgRect.top = bgRect.top + (textRect.bottom - textRect.top - cb_size) / 2;
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/* adjust for the check/radio marker */
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bgRect.bottom = bgRect.top + cb_size;
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bgRect.right = bgRect.left + cb_size;
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textRect.left = bgRect.right + 6;
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if (IsThemeBackgroundPartiallyTransparent(theme, part, state))
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DrawThemeParentBackground(hwnd, hDC, NULL);
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DrawThemeBackground(theme, hDC, part, state, &bgRect, NULL);
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if (text)
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{
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DrawThemeText(theme, hDC, part, state, text, lstrlenW(text), dtFlags, 0, &textRect);
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HeapFree(GetProcessHeap(), 0, text);
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}
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if (hPrevFont) SelectObject(hDC, hPrevFont);
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}
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static void GB_draw(HTHEME theme, HWND hwnd, HDC hDC, ButtonState drawState, UINT dtFlags)
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{
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static const int states[] = { GBS_NORMAL, GBS_DISABLED, GBS_NORMAL, GBS_NORMAL, GBS_NORMAL };
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RECT bgRect, textRect, contentRect;
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HFONT font = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
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HFONT hPrevFont = font ? SelectObject(hDC, font) : NULL;
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int state = states[ drawState ];
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WCHAR *text = get_button_text(hwnd);
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GetClientRect(hwnd, &bgRect);
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textRect = bgRect;
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if (text)
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{
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SIZE textExtent;
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GetTextExtentPoint32W(hDC, text, lstrlenW(text), &textExtent);
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bgRect.top += (textExtent.cy / 2);
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textRect.left += 10;
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textRect.bottom = textRect.top + textExtent.cy;
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textRect.right = textRect.left + textExtent.cx + 4;
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ExcludeClipRect(hDC, textRect.left, textRect.top, textRect.right, textRect.bottom);
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}
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GetThemeBackgroundContentRect(theme, hDC, BP_GROUPBOX, state, &bgRect, &contentRect);
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ExcludeClipRect(hDC, contentRect.left, contentRect.top, contentRect.right, contentRect.bottom);
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if (IsThemeBackgroundPartiallyTransparent(theme, BP_GROUPBOX, state))
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DrawThemeParentBackground(hwnd, hDC, NULL);
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DrawThemeBackground(theme, hDC, BP_GROUPBOX, state, &bgRect, NULL);
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SelectClipRgn(hDC, NULL);
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if (text)
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{
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textRect.left += 2;
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textRect.right -= 2;
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DrawThemeText(theme, hDC, BP_GROUPBOX, state, text, lstrlenW(text), 0, 0, &textRect);
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HeapFree(GetProcessHeap(), 0, text);
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}
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if (hPrevFont) SelectObject(hDC, hPrevFont);
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}
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static const pfThemedPaint btnThemedPaintFunc[BUTTON_TYPE + 1] =
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{
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PB_draw, /* BS_PUSHBUTTON */
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PB_draw, /* BS_DEFPUSHBUTTON */
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CB_draw, /* BS_CHECKBOX */
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CB_draw, /* BS_AUTOCHECKBOX */
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CB_draw, /* BS_RADIOBUTTON */
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CB_draw, /* BS_3STATE */
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CB_draw, /* BS_AUTO3STATE */
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GB_draw, /* BS_GROUPBOX */
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NULL, /* BS_USERBUTTON */
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CB_draw, /* BS_AUTORADIOBUTTON */
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NULL, /* Not defined */
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NULL, /* BS_OWNERDRAW */
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NULL, /* Not defined */
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NULL, /* Not defined */
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NULL, /* Not defined */
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NULL, /* Not defined */
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};
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static BOOL BUTTON_Paint(HTHEME theme, HWND hwnd, HDC hParamDC)
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{
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PAINTSTRUCT ps;
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HDC hDC;
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DWORD dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
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DWORD dwStyleEx = GetWindowLongW(hwnd, GWL_EXSTYLE);
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UINT dtFlags = get_drawtext_flags(dwStyle, dwStyleEx);
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ButtonState drawState = IsWindowEnabled(hwnd) ? STATE_NORMAL : STATE_DISABLED;
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pfThemedPaint paint = btnThemedPaintFunc[ dwStyle & BUTTON_TYPE ];
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if (paint)
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{
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hDC = hParamDC ? hParamDC : BeginPaint(hwnd, &ps);
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paint(theme, hwnd, hDC, drawState, dtFlags);
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if (!hParamDC) EndPaint(hwnd, &ps);
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return TRUE;
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}
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return FALSE; /* Delegate drawing to the non-themed code. */
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}
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/**********************************************************************
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* The button control subclass window proc.
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*/
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LRESULT CALLBACK THEMING_ButtonSubclassProc(HWND hwnd, UINT msg,
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WPARAM wParam, LPARAM lParam,
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ULONG_PTR dwRefData)
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{
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const WCHAR* themeClass = WC_BUTTONW;
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HTHEME theme;
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LRESULT result;
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switch (msg)
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{
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case WM_CREATE:
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result = THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
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OpenThemeData(hwnd, themeClass);
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return result;
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case WM_DESTROY:
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theme = GetWindowTheme(hwnd);
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CloseThemeData (theme);
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return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
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case WM_THEMECHANGED:
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theme = GetWindowTheme(hwnd);
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CloseThemeData (theme);
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OpenThemeData(hwnd, themeClass);
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break;
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case WM_SYSCOLORCHANGE:
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theme = GetWindowTheme(hwnd);
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if (!theme) return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
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/* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
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* which will do the repaint. */
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break;
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case WM_PAINT:
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theme = GetWindowTheme(hwnd);
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if (theme && BUTTON_Paint(theme, hwnd, (HDC)wParam))
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return 0;
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else
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return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
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case WM_ENABLE:
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theme = GetWindowTheme(hwnd);
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if (theme) RedrawWindow(hwnd, NULL, NULL,
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RDW_FRAME | RDW_INVALIDATE | RDW_UPDATENOW);
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return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
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default:
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/* Call old proc */
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return THEMING_CallOriginalClass(hwnd, msg, wParam, lParam);
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}
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return 0;
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}
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