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Sweden-Number/dlls/comctl32/taskdialog.c

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/*
* Task dialog control
*
* Copyright 2017 Fabian Maurer
*
* 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 <stdlib.h>
#include <string.h>
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "commctrl.h"
#include "winerror.h"
#include "comctl32.h"
#include "wine/debug.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(taskdialog);
static const UINT DIALOG_MIN_WIDTH = 240;
static const UINT DIALOG_SPACING = 5;
static const UINT DIALOG_BUTTON_WIDTH = 50;
static const UINT DIALOG_BUTTON_HEIGHT = 14;
static const UINT DIALOG_TIMER_MS = 200;
static const UINT ID_TIMER = 1;
struct taskdialog_info
{
HWND hwnd;
const TASKDIALOGCONFIG *taskconfig;
DWORD last_timer_tick;
HFONT font;
HFONT main_instruction_font;
/* Control handles */
HWND main_instruction;
HWND content;
HWND *buttons;
INT button_count;
HWND default_button;
/* Dialog metrics */
struct
{
LONG x_baseunit;
LONG y_baseunit;
LONG h_spacing;
LONG v_spacing;
} m;
};
struct button_layout_info
{
LONG width;
LONG line;
};
static void taskdialog_du_to_px(struct taskdialog_info *dialog_info, LONG *width, LONG *height)
{
if (width) *width = MulDiv(*width, dialog_info->m.x_baseunit, 4);
if (height) *height = MulDiv(*height, dialog_info->m.y_baseunit, 8);
}
static void template_write_data(char **ptr, const void *src, unsigned int size)
{
memcpy(*ptr, src, size);
*ptr += size;
}
static unsigned int taskdialog_get_reference_rect(const TASKDIALOGCONFIG *taskconfig, RECT *ret)
{
HMONITOR monitor = MonitorFromWindow(taskconfig->hwndParent ? taskconfig->hwndParent : GetActiveWindow(),
MONITOR_DEFAULTTOPRIMARY);
MONITORINFO info;
info.cbSize = sizeof(info);
GetMonitorInfoW(monitor, &info);
if (taskconfig->dwFlags & TDF_POSITION_RELATIVE_TO_WINDOW && taskconfig->hwndParent)
GetWindowRect(taskconfig->hwndParent, ret);
else
*ret = info.rcWork;
return info.rcWork.right - info.rcWork.left;
}
static WCHAR *taskdialog_get_exe_name(WCHAR *name, DWORD length)
{
DWORD len = GetModuleFileNameW(NULL, name, length);
if (len && len < length)
{
WCHAR *p;
if ((p = strrchrW(name, '/'))) name = p + 1;
if ((p = strrchrW(name, '\\'))) name = p + 1;
return name;
}
else
return NULL;
}
static DLGTEMPLATE *create_taskdialog_template(const TASKDIALOGCONFIG *taskconfig)
{
unsigned int size, title_size;
static const WORD fontsize = 0x7fff;
static const WCHAR emptyW[] = { 0 };
const WCHAR *titleW = NULL;
DLGTEMPLATE *template;
WCHAR pathW[MAX_PATH];
char *ptr;
/* Window title */
if (!taskconfig->pszWindowTitle)
titleW = taskdialog_get_exe_name(pathW, ARRAY_SIZE(pathW));
else if (IS_INTRESOURCE(taskconfig->pszWindowTitle))
{
if (!LoadStringW(taskconfig->hInstance, LOWORD(taskconfig->pszWindowTitle), (WCHAR *)&titleW, 0))
titleW = taskdialog_get_exe_name(pathW, ARRAY_SIZE(pathW));
}
else
titleW = taskconfig->pszWindowTitle;
if (!titleW)
titleW = emptyW;
title_size = (strlenW(titleW) + 1) * sizeof(WCHAR);
size = sizeof(DLGTEMPLATE) + 2 * sizeof(WORD);
size += title_size;
size += 2; /* font size */
template = Alloc(size);
if (!template) return NULL;
template->style = DS_MODALFRAME | DS_SETFONT | WS_CAPTION | WS_VISIBLE | WS_SYSMENU;
if (taskconfig->dwFlags & TDF_CAN_BE_MINIMIZED) template->style |= WS_MINIMIZEBOX;
if (!(taskconfig->dwFlags & TDF_NO_SET_FOREGROUND)) template->style |= DS_SETFOREGROUND;
if (taskconfig->dwFlags & TDF_RTL_LAYOUT) template->dwExtendedStyle = WS_EX_LAYOUTRTL | WS_EX_RIGHT | WS_EX_RTLREADING;
ptr = (char *)(template + 1);
ptr += 2; /* menu */
ptr += 2; /* class */
template_write_data(&ptr, titleW, title_size);
template_write_data(&ptr, &fontsize, sizeof(fontsize));
return template;
}
static HRESULT taskdialog_notify(struct taskdialog_info *dialog_info, UINT notification, WPARAM wparam, LPARAM lparam)
{
const TASKDIALOGCONFIG *taskconfig = dialog_info->taskconfig;
return taskconfig->pfCallback
? taskconfig->pfCallback(dialog_info->hwnd, notification, wparam, lparam, taskconfig->lpCallbackData)
: S_OK;
}
static void taskdialog_on_button_click(struct taskdialog_info *dialog_info, WORD command_id)
{
if (taskdialog_notify(dialog_info, TDN_BUTTON_CLICKED, command_id, 0) == S_OK)
EndDialog(dialog_info->hwnd, command_id);
}
static WCHAR *taskdialog_gettext(struct taskdialog_info *dialog_info, BOOL user_resource, const WCHAR *text)
{
const WCHAR *textW = NULL;
INT length;
WCHAR *ret;
if (IS_INTRESOURCE(text))
{
if (!(length = LoadStringW(user_resource ? dialog_info->taskconfig->hInstance : COMCTL32_hModule,
(UINT_PTR)text, (WCHAR *)&textW, 0)))
return NULL;
}
else
{
textW = text;
length = strlenW(textW);
}
ret = Alloc((length + 1) * sizeof(WCHAR));
if (ret) memcpy(ret, textW, length * sizeof(WCHAR));
return ret;
}
static void taskdialog_get_label_size(struct taskdialog_info *dialog_info, HWND hwnd, LONG max_width, SIZE *size)
{
DWORD style = DT_EXPANDTABS | DT_CALCRECT | DT_WORDBREAK;
HFONT hfont, old_hfont;
HDC hdc;
RECT rect = {0};
WCHAR text[1024];
INT text_length;
if (dialog_info->taskconfig->dwFlags & TDF_RTL_LAYOUT)
style |= DT_RIGHT | DT_RTLREADING;
else
style |= DT_LEFT;
hfont = (HFONT)SendMessageW(hwnd, WM_GETFONT, 0, 0);
text_length = GetWindowTextW(hwnd, text, ARRAY_SIZE(text));
hdc = GetDC(hwnd);
old_hfont = SelectObject(hdc, hfont);
rect.right = max_width;
size->cy = DrawTextW(hdc, text, text_length, &rect, style);
size->cx = min(max_width, rect.right - rect.left);
if (old_hfont) SelectObject(hdc, old_hfont);
ReleaseDC(hwnd, hdc);
}
static HWND taskdialog_create_label(struct taskdialog_info *dialog_info, const WCHAR *text, HFONT font)
{
WCHAR *textW;
HWND hwnd;
if (!text) return NULL;
textW = taskdialog_gettext(dialog_info, TRUE, text);
hwnd = CreateWindowW(WC_STATICW, textW, WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, dialog_info->hwnd, NULL, 0, NULL);
if (textW) Free(textW);
SendMessageW(hwnd, WM_SETFONT, (WPARAM)font, 0);
return hwnd;
}
static void taskdialog_add_main_instruction(struct taskdialog_info *dialog_info)
{
const TASKDIALOGCONFIG *taskconfig = dialog_info->taskconfig;
NONCLIENTMETRICSW ncm;
if (!taskconfig->pszMainInstruction) return;
ncm.cbSize = sizeof(ncm);
SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0);
/* 1.25 times the height */
ncm.lfMessageFont.lfHeight = ncm.lfMessageFont.lfHeight * 5 / 4;
ncm.lfMessageFont.lfWeight = FW_BOLD;
dialog_info->main_instruction_font = CreateFontIndirectW(&ncm.lfMessageFont);
dialog_info->main_instruction =
taskdialog_create_label(dialog_info, taskconfig->pszMainInstruction, dialog_info->main_instruction_font);
}
static void taskdialog_add_content(struct taskdialog_info *dialog_info)
{
dialog_info->content = taskdialog_create_label(dialog_info, dialog_info->taskconfig->pszContent, dialog_info->font);
}
static void taskdialog_add_button(struct taskdialog_info *dialog_info, HWND *button, INT id, const WCHAR *text,
BOOL custom_button)
{
const TASKDIALOGCONFIG *taskconfig = dialog_info->taskconfig;
WCHAR *textW;
textW = taskdialog_gettext(dialog_info, custom_button, text);
*button = CreateWindowW(WC_BUTTONW, textW, WS_CHILD | WS_VISIBLE | WS_TABSTOP, 0, 0, 0, 0, dialog_info->hwnd,
(HMENU)id, 0, NULL);
Free(textW);
SendMessageW(*button, WM_SETFONT, (WPARAM)dialog_info->font, 0);
if (id == taskconfig->nDefaultButton && !dialog_info->default_button) dialog_info->default_button = *button;
}
static void taskdialog_add_buttons(struct taskdialog_info *dialog_info)
{
const TASKDIALOGCONFIG *taskconfig = dialog_info->taskconfig;
DWORD flags = taskconfig->dwCommonButtons;
INT count, max_count;
/* Allocate enough memory for the custom and the default buttons. Maximum 6 default buttons possible. */
max_count = 6;
if (taskconfig->cButtons && taskconfig->pButtons) max_count += taskconfig->cButtons;
dialog_info->buttons = Alloc(max_count * sizeof(*dialog_info->buttons));
if (!dialog_info->buttons) return;
for (count = 0; count < taskconfig->cButtons; count++)
taskdialog_add_button(dialog_info, &dialog_info->buttons[count], taskconfig->pButtons[count].nButtonID,
taskconfig->pButtons[count].pszButtonText, TRUE);
#define TASKDIALOG_INIT_COMMON_BUTTON(id) \
do \
{ \
taskdialog_add_button(dialog_info, &dialog_info->buttons[count++], ID##id, MAKEINTRESOURCEW(IDS_BUTTON_##id), \
FALSE); \
} while (0)
if (flags & TDCBF_OK_BUTTON) TASKDIALOG_INIT_COMMON_BUTTON(OK);
if (flags & TDCBF_YES_BUTTON) TASKDIALOG_INIT_COMMON_BUTTON(YES);
if (flags & TDCBF_NO_BUTTON) TASKDIALOG_INIT_COMMON_BUTTON(NO);
if (flags & TDCBF_RETRY_BUTTON) TASKDIALOG_INIT_COMMON_BUTTON(RETRY);
if (flags & TDCBF_CANCEL_BUTTON) TASKDIALOG_INIT_COMMON_BUTTON(CANCEL);
if (flags & TDCBF_CLOSE_BUTTON) TASKDIALOG_INIT_COMMON_BUTTON(CLOSE);
if (!count) TASKDIALOG_INIT_COMMON_BUTTON(OK);
#undef TASKDIALOG_INIT_COMMON_BUTTON
dialog_info->button_count = count;
}
static void taskdialog_label_layout(struct taskdialog_info *dialog_info, HWND hwnd, INT start_x, LONG dialog_width,
LONG *dialog_height)
{
LONG x, y, max_width;
SIZE size;
if (!hwnd) return;
x = start_x + dialog_info->m.h_spacing;
y = *dialog_height + dialog_info->m.v_spacing;
max_width = dialog_width - x - dialog_info->m.h_spacing;
taskdialog_get_label_size(dialog_info, hwnd, max_width, &size);
SetWindowPos(hwnd, 0, x, y, size.cx, size.cy, SWP_NOZORDER);
*dialog_height = y + size.cy;
}
static void taskdialog_layout(struct taskdialog_info *dialog_info)
{
const TASKDIALOGCONFIG *taskconfig = dialog_info->taskconfig;
static BOOL first_time = TRUE;
RECT ref_rect;
LONG screen_width, dialog_width, dialog_height = 0;
LONG h_spacing, v_spacing;
struct button_layout_info *button_layout_infos;
LONG button_min_width, button_height;
LONG *line_widths, line_count, align;
LONG x, y;
SIZE size;
INT i;
screen_width = taskdialog_get_reference_rect(dialog_info->taskconfig, &ref_rect);
dialog_width = max(taskconfig->cxWidth, DIALOG_MIN_WIDTH);
taskdialog_du_to_px(dialog_info, &dialog_width, 0);
dialog_width = min(dialog_width, screen_width);
h_spacing = dialog_info->m.h_spacing;
v_spacing = dialog_info->m.v_spacing;
/* Main instruction */
taskdialog_label_layout(dialog_info, dialog_info->main_instruction, 0, dialog_width, &dialog_height);
/* Content */
taskdialog_label_layout(dialog_info, dialog_info->content, 0, dialog_width, &dialog_height);
/* Common and custom buttons */
button_layout_infos = Alloc(dialog_info->button_count * sizeof(*button_layout_infos));
line_widths = Alloc(dialog_info->button_count * sizeof(*line_widths));
button_min_width = DIALOG_BUTTON_WIDTH;
button_height = DIALOG_BUTTON_HEIGHT;
taskdialog_du_to_px(dialog_info, &button_min_width, &button_height);
for (i = 0; i < dialog_info->button_count; i++)
{
taskdialog_get_label_size(dialog_info, dialog_info->buttons[i], dialog_width - h_spacing * 2, &size);
button_layout_infos[i].width = max(size.cx, button_min_width);
}
/* Separate buttons into lines */
x = h_spacing;
for (i = 0, line_count = 0; i < dialog_info->button_count; i++)
{
if (x + button_layout_infos[i].width + h_spacing >= dialog_width)
{
x = h_spacing;
line_count++;
}
button_layout_infos[i].line = line_count;
x += button_layout_infos[i].width + h_spacing;
line_widths[line_count] += button_layout_infos[i].width + h_spacing;
}
line_count++;
/* Try to balance lines so they are about the same size */
for (i = 1; i < line_count - 1; i++)
{
int diff_now = abs(line_widths[i] - line_widths[i - 1]);
unsigned int j, last_button = 0;
int diff_changed;
for (j = 0; j < dialog_info->button_count; j++)
if (button_layout_infos[j].line == i - 1) last_button = j;
/* Difference in length of both lines if we wrapped the last button from the last line into this one */
diff_changed = abs(2 * button_layout_infos[last_button].width + line_widths[i] - line_widths[i - 1]);
if (diff_changed < diff_now)
{
button_layout_infos[last_button].line = i;
line_widths[i] += button_layout_infos[last_button].width;
line_widths[i - 1] -= button_layout_infos[last_button].width;
}
}
/* Calculate left alignment so all lines are as far right as possible. */
align = dialog_width - h_spacing;
for (i = 0; i < line_count; i++)
{
int new_alignment = dialog_width - line_widths[i];
if (new_alignment < align) align = new_alignment;
}
/* Now that we got them all positioned, move all buttons */
x = align;
size.cy = button_height;
for (i = 0; i < dialog_info->button_count; i++)
{
/* New line */
if (i > 0 && button_layout_infos[i].line != button_layout_infos[i - 1].line)
{
x = align;
dialog_height += size.cy + v_spacing;
}
y = dialog_height + v_spacing;
size.cx = button_layout_infos[i].width;
SetWindowPos(dialog_info->buttons[i], 0, x, y, size.cx, size.cy, SWP_NOZORDER);
x += button_layout_infos[i].width + h_spacing;
}
/* Add height for last row button and spacing */
dialog_height += size.cy + v_spacing;
Free(button_layout_infos);
Free(line_widths);
/* Add height for spacing, title height and frame height */
dialog_height += v_spacing;
dialog_height += GetSystemMetrics(SM_CYCAPTION);
dialog_height += GetSystemMetrics(SM_CXDLGFRAME);
if (first_time)
{
x = (ref_rect.left + ref_rect.right + dialog_width) / 2;
y = (ref_rect.top + ref_rect.bottom + dialog_height) / 2;
SetWindowPos(dialog_info->hwnd, 0, x, y, dialog_width, dialog_height, SWP_NOZORDER);
first_time = FALSE;
}
else
SetWindowPos(dialog_info->hwnd, 0, 0, 0, dialog_width, dialog_height, SWP_NOMOVE | SWP_NOZORDER);
}
static void taskdialog_init(struct taskdialog_info *dialog_info, HWND hwnd)
{
const TASKDIALOGCONFIG *taskconfig = dialog_info->taskconfig;
NONCLIENTMETRICSW ncm;
HDC hdc;
INT id;
ncm.cbSize = sizeof(ncm);
SystemParametersInfoW(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0);
memset(dialog_info, 0, sizeof(*dialog_info));
dialog_info->taskconfig = taskconfig;
dialog_info->hwnd = hwnd;
dialog_info->font = CreateFontIndirectW(&ncm.lfMessageFont);
hdc = GetDC(dialog_info->hwnd);
SelectObject(hdc, dialog_info->font);
dialog_info->m.x_baseunit = GdiGetCharDimensions(hdc, NULL, &dialog_info->m.y_baseunit);
ReleaseDC(dialog_info->hwnd, hdc);
dialog_info->m.h_spacing = DIALOG_SPACING;
dialog_info->m.v_spacing = DIALOG_SPACING;
taskdialog_du_to_px(dialog_info, &dialog_info->m.h_spacing, &dialog_info->m.v_spacing);
if (taskconfig->dwFlags & TDF_CALLBACK_TIMER)
{
SetTimer(hwnd, ID_TIMER, DIALOG_TIMER_MS, NULL);
dialog_info->last_timer_tick = GetTickCount();
}
taskdialog_add_main_instruction(dialog_info);
taskdialog_add_content(dialog_info);
taskdialog_add_buttons(dialog_info);
/* Set default button */
if (!dialog_info->default_button) dialog_info->default_button = dialog_info->buttons[0];
SendMessageW(dialog_info->hwnd, WM_NEXTDLGCTL, (WPARAM)dialog_info->default_button, TRUE);
id = GetWindowLongW(dialog_info->default_button, GWLP_ID);
SendMessageW(dialog_info->hwnd, DM_SETDEFID, id, 0);
taskdialog_layout(dialog_info);
}
static void taskdialog_destroy(struct taskdialog_info *dialog_info)
{
if (dialog_info->taskconfig->dwFlags & TDF_CALLBACK_TIMER) KillTimer(dialog_info->hwnd, ID_TIMER);
if (dialog_info->font) DeleteObject(dialog_info->font);
if (dialog_info->main_instruction_font) DeleteObject(dialog_info->main_instruction_font);
if (dialog_info->buttons) Free(dialog_info->buttons);
}
static INT_PTR CALLBACK taskdialog_proc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static const WCHAR taskdialog_info_propnameW[] = {'T','a','s','k','D','i','a','l','o','g','I','n','f','o',0};
struct taskdialog_info *dialog_info;
TRACE("hwnd=%p msg=0x%04x wparam=%lx lparam=%lx\n", hwnd, msg, wParam, lParam);
if (msg != WM_INITDIALOG)
dialog_info = GetPropW(hwnd, taskdialog_info_propnameW);
switch (msg)
{
case TDM_CLICK_BUTTON:
taskdialog_on_button_click(dialog_info, LOWORD(wParam));
break;
case WM_INITDIALOG:
dialog_info = (struct taskdialog_info *)lParam;
taskdialog_init(dialog_info, hwnd);
SetPropW(hwnd, taskdialog_info_propnameW, dialog_info);
taskdialog_notify(dialog_info, TDN_DIALOG_CONSTRUCTED, 0, 0);
taskdialog_notify(dialog_info, TDN_CREATED, 0, 0);
return FALSE;
case WM_COMMAND:
if (HIWORD(wParam) == BN_CLICKED)
{
taskdialog_on_button_click(dialog_info, LOWORD(wParam));
break;
}
return FALSE;
case WM_HELP:
taskdialog_notify(dialog_info, TDN_HELP, 0, 0);
break;
case WM_TIMER:
if (ID_TIMER == wParam)
{
DWORD elapsed = GetTickCount() - dialog_info->last_timer_tick;
if (taskdialog_notify(dialog_info, TDN_TIMER, elapsed, 0) == S_FALSE)
dialog_info->last_timer_tick = GetTickCount();
}
break;
case WM_DESTROY:
taskdialog_notify(dialog_info, TDN_DESTROYED, 0, 0);
RemovePropW(hwnd, taskdialog_info_propnameW);
taskdialog_destroy(dialog_info);
break;
default:
return FALSE;
}
return TRUE;
}
/***********************************************************************
* TaskDialogIndirect [COMCTL32.@]
*/
HRESULT WINAPI TaskDialogIndirect(const TASKDIALOGCONFIG *taskconfig, int *button,
int *radio_button, BOOL *verification_flag_checked)
{
struct taskdialog_info dialog_info;
DLGTEMPLATE *template;
INT ret;
TRACE("%p, %p, %p, %p\n", taskconfig, button, radio_button, verification_flag_checked);
if (!taskconfig || taskconfig->cbSize != sizeof(TASKDIALOGCONFIG))
return E_INVALIDARG;
dialog_info.taskconfig = taskconfig;
template = create_taskdialog_template(taskconfig);
ret = (short)DialogBoxIndirectParamW(taskconfig->hInstance, template, taskconfig->hwndParent,
taskdialog_proc, (LPARAM)&dialog_info);
Free(template);
if (button) *button = ret;
if (radio_button) *radio_button = taskconfig->nDefaultButton;
if (verification_flag_checked) *verification_flag_checked = TRUE;
return S_OK;
}
/***********************************************************************
* TaskDialog [COMCTL32.@]
*/
HRESULT WINAPI TaskDialog(HWND owner, HINSTANCE hinst, const WCHAR *title, const WCHAR *main_instruction,
const WCHAR *content, TASKDIALOG_COMMON_BUTTON_FLAGS common_buttons, const WCHAR *icon, int *button)
{
TASKDIALOGCONFIG taskconfig;
TRACE("%p, %p, %s, %s, %s, %#x, %s, %p\n", owner, hinst, debugstr_w(title), debugstr_w(main_instruction),
debugstr_w(content), common_buttons, debugstr_w(icon), button);
memset(&taskconfig, 0, sizeof(taskconfig));
taskconfig.cbSize = sizeof(taskconfig);
taskconfig.hwndParent = owner;
taskconfig.hInstance = hinst;
taskconfig.dwCommonButtons = common_buttons;
taskconfig.pszWindowTitle = title;
taskconfig.u.pszMainIcon = icon;
taskconfig.pszMainInstruction = main_instruction;
taskconfig.pszContent = content;
return TaskDialogIndirect(&taskconfig, button, NULL, NULL);
}
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