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SynTaskDialog.pas
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/// implement TaskDialog window (native on Vista/Seven, emulated on XP)
// - this unit is a part of the freeware Synopse mORMot framework,
// licensed under a MPL/GPL/LGPL tri-license; version 1.18
unit SynTaskDialog;
{
This file is part of Synopse framework.
Synopse framework. Copyright (C) 2017 Arnaud Bouchez
Synopse Informatique - https://synopse.info
*** BEGIN LICENSE BLOCK *****
Version: MPL 1.1/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Mozilla Public License Version
1.1 (the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the License.
The Original Code is Synopse framework.
The Initial Developer of the Original Code is Arnaud Bouchez.
Portions created by the Initial Developer are Copyright (C) 2017
the Initial Developer. All Rights Reserved.
Contributor(s):
- Ulrich Gerhardt
Alternatively, the contents of this file may be used under the terms of
either the GNU General Public License Version 2 or later (the "GPL"), or
the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****
Version 1.13
- initial release
Version 1.15
- new tdfQueryMasked function to display * in the tdfQuery editor field
Version 1.16
- fixed issue when changing the current application with Alt+Tab - see
https://synopse.info/fossil/tktview?name=01395e5932
- fixed compiler error when using the unit with runtime packages enabled
(known compiler issue about string resources, referenced as E2201)
- default modal dialog parent changed into any current active form
- added tdfQueryFieldFocused optional flag to focus the input field component
- some aesthetical rendering changes and code clean-up (e.g. no temporary
form necessary), thanks to uligerhardt proposals
Version 1.18
- fixed label height display when long text is wrapped on several lines
- bottom buttons use better looking TButton component
- bottom buttons won't trim expected shortcut definition, in emulated mode
- added OnButtonClicked property and associated SetElementText() method
- fix the Windows Vista Alt key VCL bug (QC 37403) for Delphi 6/7/2006
- now compiles and run in Win64 platform (Delphi XE2+)
}
interface
{$I Synopse.inc}
{$IFNDEF DELPHI5OROLDER} // Delphi 6 or newer
{$ifndef VER140} // Delphi 6
{$define WITHUXTHEME} // Themes unit exists till Delphi 7
{$endif}
{$ifndef ISDELPHI2007ANDUP}
{$define FIXVCLALTKEY} // fix QC 37403 for Delphi 6/7/2006
{$endif}
{$ENDIF}
uses
Windows, CommCtrl, Classes, SysUtils, Messages,
{$ifndef FPC}
Consts,
{$endif}
Menus,
{$ifdef USETMSPACK}
AdvGlowButton, AdvMenus, TaskDialog, TaskDialogEx,
{$endif}
{$ifdef WITHUXTHEME}
Themes,
{$endif}
Graphics, Forms, Controls, StdCtrls, ExtCtrls, Buttons;
var
/// will map a generic OK picture from SynTaskDialog.res
BitmapOK: TBitmap;
/// will map a generic Arrow picture from SynTaskDialog.res
BitmapArrow: TBitmap;
/// will map a default font, according to the available
// - if Calibri is installed, will use it
// - will fall back to Tahoma otherwise
DefaultFont: TFont;
{$ifndef USETMSPACK}
/// is filled once in the initialization block below
// - you can set this reference to nil to force Delphi dialogs even
// on Vista/Seven (e.g. make sense if TaskDialogBiggerButtons=true)
TaskDialogIndirect: function(AConfig: pointer; Res: PInteger;
ResRadio: PInteger; VerifyFlag: PBOOL): HRESULT; stdcall;
const
/// match the 1st custom button ID
mrBtn1 = 100;
/// match the 2nd custom button ID
mrBtn2 = 101;
/// match the 3rd custom button ID
mrBtn3 = 102;
/// match the 4th custom button ID
mrBtn4 = 103;
/// match the 5th custom button ID
mrBtn5 = 104;
/// match the 6th custom button ID
mrBtn6 = 105;
/// match the 7th custom button ID
mrBtn7 = 106;
/// match the 8th custom button ID
mrBtn8 = 107;
/// match the 9th custom button ID
mrBtn9 = 108;
/// match the 1st custom radio ID
mrRad1 = 200;
/// match the 2nd custom radio ID
mrRad2 = 201;
/// match the 3rd custom radio ID
mrRad3 = 202;
/// match the 4th custom radio ID
mrRad4 = 203;
/// match the 5th custom radio ID
mrRad5 = 204;
/// match the 6th custom radio ID
mrRad6 = 205;
/// match the 7th custom radio ID
mrRad7 = 206;
/// match the 8th custom radio ID
mrRad8 = 207;
/// match the 9th custom radio ID
mrRad9 = 208;
type
/// the standard kind of common buttons handled by the Task Dialog
TCommonButton = (
cbOK, cbYes, cbNo, cbCancel, cbRetry, cbClose);
/// set of standard kind of common buttons handled by the Task Dialog
TCommonButtons = set of TCommonButton;
/// the available main icons for the Task Dialog
TTaskDialogIcon = (
tiBlank, tiWarning, tiQuestion, tiError, tiInformation, tiNotUsed, tiShield);
/// the available footer icons for the Task Dialog
TTaskDialogFooterIcon = (
tfiBlank, tfiWarning, tfiQuestion, tfiError, tfiInformation, tfiShield);
/// the available configuration flags for the Task Dialog
// - most are standard TDF_* flags used for Vista/Seven native API
// (see http://msdn.microsoft.com/en-us/library/bb787473(v=vs.85).aspx
// for TASKDIALOG_FLAGS)
// - tdfQuery and tdfQueryMasked are custom flags, implemented in pure Delphi
// code to handle input query
// - our emulation code will handle only tdfUseCommandLinks,
// tdfUseCommandLinksNoIcon, and tdfQuery options
TTaskDialogFlag = (
tdfEnableHyperLinks, tdfUseHIconMain, tdfUseHIconFooter,
tdfAllowDialogCancellation, tdfUseCommandLinks, tdfUseCommandLinksNoIcon,
tdfExpandFooterArea, tdfExpandByDefault, tdfVerificationFlagChecked,
tdfShowProgressBar, tdfShowMarqueeProgressBar, tdfCallbackTimer,
tdfPositionRelativeToWindow, tdfRtlLayout, tdfNoDefaultRadioButton,
tdfCanBeMinimized, tdfQuery, tdfQueryMasked, tdfQueryFieldFocused);
/// set of available configuration flags for the Task Dialog
TTaskDialogFlags = set of TTaskDialogFlag;
PTaskDialog = ^TTaskDialog;
/// this callback will be triggerred when a task dialog button is clicked
// - to prevent the task dialog from closing, the application must set
// ACanClose to FALSE, otherwise the task dialog is closed and the button
// ID is returned via the original TTaskDialog.Execute() result
TTaskDialogButtonClickedEvent = procedure(Sender: PTaskDialog;
AButtonID: integer; var ACanClose: Boolean) of object;
/// the visual components of this Task Dialog
// - map low-level TDE_CONTENT...TDE_MAIN_INSTRUCTION constants and
// the query editor and checkbox
// - tdeEdit is for the query editor
// - tdeVerif is for the checkbox
TTaskDialogElement = (
tdeContent, tdeExpandedInfo, tdeFooter, tdeMainInstruction,
tdeEdit, tdeVerif);
/// the actual form class used for emulation
TEmulatedTaskDialog = class(TForm)
protected
procedure HandleEmulatedButtonClicked(Sender: TObject);
public
/// the Task Dialog structure which created the form
Owner: PTaskDialog;
/// the labels corresponding to the Task Dialog main elements
Element: array[tdeContent..tdeMainInstruction] of TLabel;
/// the Task Dialog selection list
Combo: TComboBox;
/// the Task Dialog optional query editor
Edit: TEdit;
/// the Task Dialog optional checkbox
Verif: TCheckBox;
end;
/// structure for low-level access to the task dialog implementation
// - points either to the HWND handle of the new TaskDialog API
// or to the emulation dialog
TTaskDialogImplementation = record
OnButtonClicked: TTaskDialogButtonClickedEvent;
case Emulated: Boolean of
False: (Wnd: HWND);
True: (Form: TEmulatedTaskDialog);
end;
/// implements a TaskDialog
// - will use the new TaskDialog API under Vista/Seven, and emulate it with
// pure Delphi code and standard themed VCL components under XP or 2K
// - create a TTaskDialog object/record on the stack will initialize all
// its string parameters to '' (it's a SHAME that since Delphi 2009, objects
// are not initialized any more: we have to define this type as object before
// Delphi 2009, and as record starting with Delphi 2009)
// - set the appropriate string parameters, then call Execute() with all
// additional parameters
// - RadioRes/SelectionRes/VerifyChecked will be used to reflect the state
// after dialog execution
// - here is a typical usage:
// !var Task: TTaskDialog;
// !begin
// ! Task.Inst := 'Saving application settings';
// ! Task.Content := 'This is the content';
// ! Task.Radios := 'Store settings in registry'#10'Store settings in XML file';
// ! Task.Verify := 'Do no ask for this setting next time';
// ! Task.VerifyChecked := true;
// ! Task.Footer := 'XML file is perhaps a better choice';
// ! Task.Execute([],0,[],tiQuestion,tfiInformation,mrRad1);
// ! ShowMessage(IntToStr(Task.RadioRes)); // mrRad1=Registry, mrRad2=XML
// ! if Task.VerifyChecked then
// ! ShowMessage(Task.Verify);
// !end;
{$ifdef UNICODE}
TTaskDialog = record
{$else}
TTaskDialog = object
{$endif}
/// the main title of the dialog window
// - if left void, the title of the application main form is used
Title: string;
/// the main instruction (first line on top of window)
// - any '\n' will be converted into a line feed
// - if left void, the text is taken from the current dialog icon kind
Inst: string;
/// the dialog's primary content content text
// - any '\n' will be converted into a line feed
Content: string;
/// a #13#10 or #10 separated list of custom buttons
// - they will be identified with an ID number starting at 100 (so you
// may use mrBtn1, mrBtn2, mrBtn3... mrBtn9 constants)
// - by default, the buttons will be created at the dialog bottom, just
// like the common buttons
// - if tdfUseCommandLinks flag is set, the custom buttons will be created
// as big button in the middle of the dialog window; in this case, any
// '\n' will be converted as note text (shown with smaller text under native
// Vista/Seven TaskDialog, or as popup hint within Delphi emulation)
// - see the AddButton() wrapper method for an easy access
Buttons: string;
/// a #13#10 or #10 separated list of custom radio buttons
// - they will be identified with an ID number starting at 200 (so you
// may use mrRad1, mrRad2, mrRad3... mrRad9 constants)
// - aRadioDef parameter can be set to define the default selected value
// - '\n' will be converted as note text (shown with smaller text under
// native Vista/Seven TaskDialog, or as popup hint within Delphi emulation)
Radios: string;
/// the expanded information content text
// - any '\n' will be converted into a line feed
// - the Delphi emulation will always show the Info content (there is no
// collapse/expand button)
Info: string;
/// the button caption to be displayed when the information is collapsed
// - not used under XP: the Delphi emulation will always show the Info content
InfoExpanded: string;
/// the button caption to be displayed when the information is expanded
// - not used under XP: the Delphi emulation will always show the Info content
InfoCollapse: string;
/// the footer content text
// - any '\n' will be converted into a line feed
Footer: string;
/// the text of the bottom most optional checkbox
Verify: string;
/// a #13#10 or #10 separated list of items to be selected
// - if set, a Combo Box will be displayed to select
// - if tdfQuery is in the flags, the combo box will be in edition mode,
// and the user will be able to edit the Query text or fill the field
// with one item of the selection
// - this selection is not handled via the Vista/Seven TaskDialog, but
// with our Delphi emulation code (via a TComboBox)
Selection: string;
/// some text to be edited
// - if tdfQuery is in the flags, will contain the default query text
// - if Selection is set, the
Query: string;
/// the selected radio item
// - first is numeroted 0
RadioRes: integer;
/// after execution, contains the selected item from the Selection list
SelectionRes: integer;
/// reflect the the bottom most optional checkbox state
// - if Verify is not '', should be set before execution
// - after execution, will contain the final checkbox state
VerifyChecked: BOOL;
/// low-level access to the task dialog implementation
Dialog: TTaskDialogImplementation;
/// launch the TaskDialog form
// - some common buttons can be set via aCommonButtons
// - in emulation mode, aFlags will handle only tdfUseCommandLinks,
// tdfUseCommandLinksNoIcon, and tdfQuery options
// - will return 0 on error, or the Button ID (e.g. mrOk for the OK button
// or mrBtn1/100 for the first custom button defined in Buttons string)
// - if Buttons was defined, aButtonDef can set the selected Button ID
// - if Radios was defined, aRadioDef can set the selected Radio ID
// - aDialogIcon and aFooterIcon are used to specify the displayed icons
// - aWidth can be used to force a custom form width (in pixels)
// - aParent can be set to any HWND - by default, Application.DialogHandle
// - if aNonNative is TRUE, the Delphi emulation code will always be used
// - aEmulateClassicStyle can be set to enforce conformity with the non themed
// user interface - see @https://synopse.info/forum/viewtopic.php?pid=2867#p2867
// - aOnButtonClicked can be set to a callback triggerred when a button is
// clicked
function Execute(aCommonButtons: TCommonButtons=[];
aButtonDef: integer=0; aFlags: TTaskDialogFlags=[];
aDialogIcon: TTaskDialogIcon=tiInformation;
aFooterIcon: TTaskDialogFooterIcon=tfiWarning;
aRadioDef: integer=0; aWidth: integer=0; aParent: HWND=0;
aNonNative: boolean=false; aEmulateClassicStyle: boolean = false;
aOnButtonClicked: TTaskDialogButtonClickedEvent=nil): integer;
/// allow a OnButtonClicked callback to change the Task Dialog main elements
// - note that tdeVerif could be modified only in emulation mode, since
// the API does not give any runtime access to the checkbox caption
// - other elements will work in both emulated and native modes
procedure SetElementText(element: TTaskDialogElement; const Text: string);
/// wrapper method able to add a custom button to the Task Dialog
// - will add the expected content to the Buttons text field
procedure AddButton(const ACaption: string; const ACommandLinkHint: string = '');
end;
/// a wrapper around the TTaskDialog.Execute method
// - used to provide a "flat" access to task dialog parameters
{$ifdef UNICODE}
TTaskDialogEx = record
{$else}
TTaskDialogEx = object
{$endif}
/// the associated main TTaskDialog instance
Base: TTaskDialog;
/// some common buttons to be displayed
CommonButtons: TCommonButtons;
/// the default button ID
ButtonDef: integer;
/// the associated configuration flags for this Task Dialog
// - in emulation mode, aFlags will handle only tdfUseCommandLinks,
// tdfUseCommandLinksNoIcon, and tdfQuery options
Flags: TTaskDialogFlags;
/// used to specify the dialog icon
DialogIcon: TTaskDialogIcon;
/// used to specify the footer icon
FooterIcon: TTaskDialogFooterIcon;
/// the default radio button ID
RadioDef: integer;
/// can be used to force a custom form width (in pixels)
Width: integer;
/// if TRUE, the Delphi emulation code will always be used
NonNative: boolean;
/// can be used to enforce conformity with the non themed user interface
EmulateClassicStyle: boolean;
/// this event handler will be fired on a button dialog click
OnButtonClicked: TTaskDialogButtonClickedEvent;
/// will initialize the dialog parameters
// - can be used to display some information with less parameters:
// !var TaskEx: TTaskDialogEx;
// ! ...
// ! TaskEx.Init;
// ! TaskEx.Base.Title := 'Task Dialog Test';
// ! TaskEx.Base.Inst := 'Callback Test';
// ! TaskEx.Execute;
procedure Init;
/// main (and unique) method showing the dialog itself
// - is in fact a wrapper around the TTaskDialog.Execute method
function Execute(aParent: HWND=0): integer;
end;
{$endif USETMSPACK}
type
{$ifdef USETMSPACK}
/// a TMS PopupMenu
TSynPopupMenu = TAdvPopupMenu;
TSynButtonParent = TAdvGlowButton;
TSynTaskDialogButton = TAdvGlowButton;
{$else}
/// a generic VCL popup menu
TSynPopupMenu = TPopupMenu;
TSynButtonParent = {$ifdef WITHUXTHEME}TBitBtn{$else}TButton{$endif};
TSynTaskDialogButton = TButton;
{$endif USETMSPACK}
/// a generic Button to be used in the User Interface
// - is always a Themed button: under Delphi 6, since TBitBtn is not themed,
// it will be a row TButton with no glyph... never mind...
TSynButton = class(TSynButtonParent)
protected
{$ifndef USETMSPACK}
fDropDownMenu: TSynPopupMenu;
{$endif}
public
/// create a standard button instance
// - ModalResult/Default/Cancel properties will be set as exepcted for this
// kind of button
constructor CreateKind(Owner: TWinControl; Btn: TCommonButton;
Left, Right, Width, Height: integer);
/// set the glyph of the button
// - set nothing under Delphi 6
procedure SetBitmap(Bmp: TBitmap);
{$ifndef USETMSPACK}
/// drop down the associated Popup Menu
procedure DoDropDown;
/// the associated Popup Menu to drop down
property DropDownMenu: TSynPopupMenu read fDropDownMenu write fDropDownMenu;
{$endif}
end;
/// return the text without the '&' characters within
function UnAmp(const s: string): string;
{$ifndef USETMSPACK}
var
{
/// if set to TRUE, buttons will be bigger than default
// - can be useful e.g. for touch screens
// - will work only for the Delphi emulated version (aNonNative=true) of
// TSynTask - could be combined with @TaskDialogIndirect := nil;
TaskDialogBiggerButtons: boolean = false;
}
/// a default Task Dialog wrapper instance
// - can be used to display some information with less parameters, just
// like the TTaskDialogEx.Init method:
// !var TaskEx: TTaskDialogEx;
// ! ...
// ! TaskEx := DefaultTaskDialog;
// ! TaskEx.Base.Title := 'Task Dialog Test';
// ! TaskEx.Base.Inst := 'Callback Test';
// ! TaskEx.Execute;
DefaultTaskDialog: TTaskDialogEx = (
DialogIcon: tiInformation;
FooterIcon: tfiWarning);
{$endif}
implementation
{$R SynTaskDialog.res}
const
TD_BTNMOD: array[TCommonButton] of Integer = (
mrOk, mrYes, mrNo, mrCancel, mrRetry, mrAbort);
function TD_BTNS(button: TCommonButton): pointer;
begin
case button of
cbOK: result := @SMsgDlgOK;
cbYes: result := @SMsgDlgYes;
cbNo: result := @SMsgDlgNo;
cbCancel: result := @SMsgDlgCancel;
cbRetry: result := @SMsgDlgRetry;
cbClose: result := @SCloseButton;
else result := nil;
end;
end;
{ TSynButton }
constructor TSynButton.CreateKind(Owner: TWinControl; Btn: TCommonButton;
Left, Right, Width, Height: integer);
begin
Create(Owner);
Parent := Owner;
SetBounds(Left,Right,Width,Height);
Caption := LoadResString(TD_BTNS(Btn));
ModalResult := TD_BTNMOD[Btn];
case Btn of
cbOK: Default := true;
cbCancel: Cancel := true;
end;
case Btn of
cbOK: SetBitmap(BitmapOK);
end;
end;
{$ifndef USETMSPACK}
procedure TSynButton.DoDropDown;
begin
if DropDownMenu<>nil then
with ClientToScreen(BoundsRect.TopLeft) do
DropDownMenu.Popup(X,Y+Height);
end;
{$endif}
procedure TSynButton.SetBitmap(Bmp: TBitmap);
begin
if Bmp<>nil then
{$ifdef USETMSPACK}
Picture.Assign(Bmp);
{$else}
{$ifdef WITHUXTHEME}
Glyph := Bmp;
{$else}
// Delphi 6 TBitBtn has no theming -> use generic TButton without glyph
{$endif}
{$endif}
end;
function UnAmp(const s: string): string;
begin
result := StripHotkey(s);
end;
{$ifndef USETMSPACK}
const
TD_ICONS: array[TTaskDialogIcon] of integer = (
17, 84, 99, 98, 81, 0, 78);
TD_FOOTERICONS: array[TTaskDialogFooterIcon] of integer = (
17, 84, 99, 98, 65533, 65532);
WIN_ICONS: array[TTaskDialogIcon] of PChar = (
nil, IDI_WARNING, IDI_QUESTION, IDI_ERROR, IDI_INFORMATION, nil, IDI_WINLOGO);
WIN_FOOTERICONS: array[TTaskDialogFooterIcon] of PChar = (
nil, IDI_WARNING, IDI_QUESTION, IDI_ERROR, IDI_INFORMATION, IDI_WINLOGO);
function IconMessage(Icon: TTaskDialogIcon): string;
begin
case Icon of
tiWarning: result := SMsgDlgWarning;
tiQuestion: result := SMsgDlgConfirm;
tiError: result := SMsgDlgError;
tiInformation, tiShield: result := SMsgDlgInformation;
else result := '';
end;
end;
{$ifdef FIXVCLALTKEY}
var
WndProcHook: HHOOK = 0;
function HookedWndProcFunc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
begin
if nCode=HC_ACTION then
if PCWPSTRUCT(lParam).message=WM_UPDATEUISTATE then
InvalidateRect(PCWPSTRUCT(lParam).hwnd,nil,false);
result := CallNextHookEx(WndProcHook,nCode,wParam,lParam);
end;
{$endif}
procedure InitComCtl6;
var OSVersionInfo: TOSVersionInfo;
begin
OSVersionInfo.dwOSVersionInfoSize := sizeof(OSVersionInfo);
GetVersionEx(OSVersionInfo);
if OSVersionInfo.dwMajorVersion<6 then
@TaskDialogIndirect := nil else begin
@TaskDialogIndirect := GetProcAddress(GetModuleHandle(comctl32),'TaskDialogIndirect');
{$ifdef FIXVCLALTKEY}
{$WARN SYMBOL_PLATFORM OFF}
if (DebugHook=0) {$ifdef WITHUXTHEME}and ThemeServices.ThemesEnabled{$endif} then
WndProcHook := SetWindowsHookEx(WH_CALLWNDPROC,HookedWndProcFunc,0,GetCurrentThreadID);
{$WARN SYMBOL_PLATFORM ON}
{$endif}
end;
end;
type
/// internal type used for Unicode string storage
WS = {$ifdef UNICODE}string{$else}WideString{$endif};
function CR(const aText: string): string;
begin
if pos('\n', aText) = 0 then
result := aText else
result := StringReplace(aText, '\n', #10, [rfReplaceAll]);
end;
{ TTaskDialog }
type
// see http://msdn.microsoft.com/en-us/library/bb787473
PTASKDIALOG_BUTTON = ^TTASKDIALOG_BUTTON;
TTASKDIALOG_BUTTON = packed record
nButtonID: integer;
pszButtonText: PWideChar;
end;
TTASKDIALOGCONFIG = packed record
cbSize: integer;
hwndParent: HWND;
hInstance: THandle;
dwFlags: cardinal;
dwCommonButtons: cardinal;
pszWindowTitle: PWideChar;
hMainIcon: HICON;
pszMainInstruction: PWideChar;
pszContent: PWideChar;
cButtons: integer;
pButtons: PTASKDIALOG_BUTTON;
nDefaultButton: integer;
cRadioButtons: integer;
pRadioButtons: PTASKDIALOG_BUTTON;
nDefaultRadioButton: integer;
pszVerificationText: PWideChar;
pszExpandedInformation: PWideChar;
pszExpandedControlText: PWideChar;
pszCollapsedControlText: PWideChar;
hFooterIcon: HICON;
pszFooter: PWideChar;
pfCallback: pointer;
lpCallbackData: pointer;
cxWidth: integer;
end;
const
TDN_BUTTON_CLICKED = 2; // wParam = Button ID
function TaskDialogCallbackProc(hwnd: HWND; uNotification: UINT;
wParam: WPARAM; lParam: LPARAM; dwRefData: pointer): HRESULT; stdcall;
var ptd: PTaskDialog absolute dwRefData;
CanClose: Boolean;
begin
ptd^.Dialog.Wnd := hwnd;
Result := S_OK;
case uNotification of
TDN_BUTTON_CLICKED:
if Assigned(ptd^.Dialog.OnButtonClicked) then begin
CanClose := True;
ptd^.Dialog.OnButtonClicked(ptd,wParam,CanClose);
if not CanClose then
Result := S_FALSE;
end;
end;
end;
function TTaskDialog.Execute(aCommonButtons: TCommonButtons;
aButtonDef: integer; aFlags: TTaskDialogFlags;
aDialogIcon: TTaskDialogIcon; aFooterIcon: TTaskDialogFooterIcon;
aRadioDef, aWidth: integer; aParent: HWND; aNonNative: boolean;
aEmulateClassicStyle: boolean; aOnButtonClicked: TTaskDialogButtonClickedEvent): integer;
function GetNextStringLineToWS(var P: PChar): WS;
var S: PChar;
{$ifndef UNICODE}tmp: string;{$endif}
begin
if P=nil then
result := '' else begin
S := P;
while S[0]>=' ' do
inc(S);
{$ifdef UNICODE}
SetString(result,P,S-P);
result := CR(result);
{$else}
SetString(tmp,P,S-P);
result := WideString(CR(tmp));
{$endif}
while (S^<>#0) and (S^<' ') do inc(S); // ignore e.g. #13 or #10
if S^<>#0 then
P := S else
P := nil;
end;
end;
var aHint: string;
function NoCR(const aText: string): string;
var i: integer;
begin
result := aText;
aHint := '';
i := pos('\n',result);
if i>0 then begin
aHint := CR(copy(result,i+2,maxInt));
SetLength(result,i-1);
end;
end;
function N(const aText: string): WS;
begin
if aText='' then
result := '' else
result := WS(CR(aText));
end;
var RU: array of Ws;
RUCount: integer;
But: array of TTASKDIALOG_BUTTON;
procedure AddRU(Text: string; var n: integer; firstID: integer);
var P: PChar;
begin
if Text='' then
exit;
Text := SysUtils.trim(Text);
P := @Text[1]; // '\n' handling in GetNextStringLineToWS(P) will change P^
while P<>nil do begin
if length(RU)<=RUCount then begin
SetLength(RU,RUCount+16);
SetLength(But,RUCount+16);
end;
RU[RUCount] := GetNextStringLineToWS(P);
with But[RUCount] do begin
nButtonID := n+firstID;
pszButtonText := pointer(RU[RUCount]);
end;
inc(n);
inc(RUCount);
end;
end;
var Config: TTASKDIALOGCONFIG;
i, X, Y, XB, IconBorder, FontHeight: integer;
Par: TWinControl;
Panel: TPanel;
CurrTabOrder: TTabOrder;
Image: TImage;
Pic: TIcon;
Bmp: TBitmap;
List: TStrings;
B: TCommonButton;
CommandLink: TSynButton;
Rad: array of TRadioButton;
function AddLabel(Text: string; BigFont: boolean): TLabel;
var R: TRect;
W: integer;
begin
result := TLabel.Create(Dialog.Form);
result.Parent := Par;
result.WordWrap := true;
if BigFont then begin
if aEmulateClassicStyle then begin
result.Font.Height := FontHeight-2;
result.Font.Style := [fsBold]
end else begin
result.Font.Height := FontHeight-4;
result.Font.Color := $B00000;
end;
end else
result.Font.Height := FontHeight;
Text := CR(Text);
result.AutoSize := false;
R.Left := 0;
R.Top := 0;
W := aWidth-X-8;
R.Right := W;
R.Bottom := result.Height;
R.Bottom := DrawText(result.Canvas.Handle,pointer(Text),-1,R,DT_CALCRECT or DT_WORDBREAK);
result.SetBounds(X,Y,W,R.Bottom);
result.Caption := Text;
inc(Y,R.Bottom+16);
end;
procedure AddBevel;
var BX: integer;
begin
with TBevel.Create(Dialog.Form) do begin
Parent := Par;
if (Image<>nil) and (Y<Image.Top+Image.Height) then
BX := X else
BX := 2;
SetBounds(BX,Y,aWidth-BX-2,2);
end;
inc(Y,16);
end;
function AddBtn(const s: string; ModalResult: integer): TSynTaskDialogButton;
var WB: integer;
begin
WB := Dialog.Form.Canvas.TextWidth(s)+52;
dec(XB,WB);
if XB<X shr 1 then begin
XB := aWidth-WB;
inc(Y,32);
end;
result := TSynTaskDialogButton.Create(Dialog.Form);
result.Parent := Par;
if aEmulateClassicStyle then
result.SetBounds(XB,Y,WB-10,22) else
result.SetBounds(XB,Y,WB-12,28);
result.Caption := s;
result.ModalResult := ModalResult;
result.TabOrder := CurrTabOrder;
result.OnClick := Dialog.Form.HandleEmulatedButtonClicked;
case ModalResult of
mrOk: begin
result.Default := true;
if aCommonButtons=[cbOk] then
result.Cancel := true;
end;
mrCancel: result.Cancel := true;
end;
if ModalResult=aButtonDef then
Dialog.Form.ActiveControl := result;
end;
begin
if (byte(aCommonButtons)=0) and (Buttons='') then begin
aCommonButtons := [cbOk];
if aButtonDef=0 then
aButtonDef := mrOk;
end;
if Title='' then
if Application.MainForm=nil then
Title := Application.Title else
Title := Application.MainForm.Caption;
if Inst='' then
Inst := IconMessage(aDialogIcon);
if aParent=0 then
if Screen.ActiveCustomForm<>nil then
aParent := Screen.ActiveCustomForm.Handle else
aParent := Application.Handle;
Dialog.OnButtonClicked := aOnButtonClicked;
if Assigned(TaskDialogIndirect) and not aNonNative and
not (tdfQuery in aFlags) and (Selection='') then begin
Dialog.Emulated := False;
// use Vista/Seven TaskDialog implementation (not tdfQuery nor Selection)
FillChar(Config,sizeof(Config),0);
Config.cbSize := sizeof(Config);
Config.hwndParent := aParent;
Config.pszWindowTitle := pointer(N(Title));
Config.pszMainInstruction := pointer(N(Inst));
Config.pszContent := pointer(N(Content));
RUCount := 0;
AddRU(Buttons,Config.cButtons,mrBtn1);
AddRU(Radios,Config.cRadioButtons,mrRad1);
if Config.cButtons>0 then
Config.pButtons := @But[0];
if Config.cRadioButtons>0 then
Config.pRadioButtons := @But[Config.cButtons];
Config.pszVerificationText := pointer(N(Verify));
Config.pszExpandedInformation := pointer(N(Info));
Config.pszExpandedControlText := pointer(N(InfoExpanded));
Config.pszCollapsedControlText := pointer(N(InfoCollapse));
Config.pszFooter := pointer(N(Footer));
Config.dwCommonButtons := byte(aCommonButtons);
if (Verify<>'') and VerifyChecked then
include(aFlags,tdfVerificationFlagChecked);
if (Config.cButtons=0) and (aCommonButtons=[cbOk]) then
Include(aFlags,tdfAllowDialogCancellation); // just OK -> Esc/Alt+F4 close
Config.dwFlags := integer(aFlags);
Config.hMainIcon := TD_ICONS[aDialogIcon];
Config.hFooterIcon := TD_FOOTERICONS[aFooterIcon];
Config.nDefaultButton := aButtonDef;
Config.nDefaultRadioButton := aRadioDef;
Config.cxWidth := aWidth;
Config.pfCallback := @TaskDialogCallbackProc;
Config.lpCallbackData := @self;
if TaskDialogIndirect(@Config,@result,@RadioRes,@VerifyChecked)=S_OK then
exit; // error (mostly invalid argument) -> execute the VCL emulation
end;
// use our native (naive?) Delphi implementation
Dialog.Emulated := true;
Dialog.Form := TEmulatedTaskDialog.CreateNew(Application);
try
Dialog.Form.Owner := @Self;
// initialize form properties
Dialog.Form.BorderStyle := bsDialog;
Dialog.Form.BorderIcons := [];
Dialog.Form.Position := poScreenCenter;
if not aEmulateClassicStyle then
Dialog.Form.Font := DefaultFont;
FontHeight := Dialog.Form.Font.Height;
if aWidth=0 then begin
aWidth := Dialog.Form.Canvas.TextWidth(Inst);
if (aWidth>300) or (Dialog.Form.Canvas.TextWidth(Content)>300) or
(length(Buttons)>40) then
aWidth := 480 else
aWidth := 420;
end;
Dialog.Form.ClientWidth := aWidth;
Dialog.Form.Height := 200;
Dialog.Form.Caption := Title;
// create a white panel for the main dialog part
Panel := TPanel.Create(Dialog.Form);
Panel.Parent := Dialog.Form;
Panel.Align := alTop;
Panel.BorderStyle := bsNone;
Panel.BevelOuter := bvNone;
if not aEmulateClassicStyle then begin
{$ifdef HASINLINE}
Panel.BevelEdges := [beBottom];
Panel.BevelKind := bkFlat;
{$endif}
Panel.Color := clWhite;
{$ifdef WITHUXTHEME}
Panel.ParentBackground := false; // clWhite not used otherwise
{$endif}
end;
Par := Panel;
// handle main dialog icon
if aEmulateClassicStyle then
IconBorder := 10 else
IconBorder := 24;
if WIN_ICONS[aDialogIcon]<>nil then begin
Image := TImage.Create(Dialog.Form);
Image.Parent := Par;
Image.Picture.Icon.Handle := LoadIcon(0,WIN_ICONS[aDialogIcon]);
Image.SetBounds(IconBorder,IconBorder,Image.Picture.Icon.Width,Image.Picture.Icon.Height);
X := Image.Width+IconBorder*2;
Y := Image.Top;
if aEmulateClassicStyle then
inc(Y, 8);
end else begin
Image := nil;
if not aEmulateClassicStyle then
IconBorder := IconBorder*2;
X := IconBorder;
Y := IconBorder;
end;
// add main texts (Instruction, Content, Information)
Dialog.Form.Element[tdeMainInstruction] := AddLabel(Inst,true);
Dialog.Form.Element[tdeContent] := AddLabel(Content, false);
if Info<>'' then
// no information collapse/expand yet: it's always expanded
Dialog.Form.Element[tdeExpandedInfo] := AddLabel(Info,false);
// add command links buttons
if (tdfUseCommandLinks in aFlags) and (Buttons<>'') then
with TStringList.Create do
try
inc(Y,8);
Text := SysUtils.trim(Buttons);
for i := 0 to Count-1 do begin
CommandLink := TSynButton.Create(Dialog.Form);
with CommandLink do begin
Parent := Par;
Font.Height := FontHeight-3;
if aEmulateClassicStyle then
SetBounds(X,Y,aWidth-10-X,40) else
SetBounds(X,Y,aWidth-16-X,40);
Caption := NoCR(Strings[i]);
if aHint<>'' then begin
ShowHint := true;
Hint := aHint; // note shown as Hint
end;
inc(Y,Height+2);
ModalResult := i+mrBtn1;
OnClick := Dialog.Form.HandleEmulatedButtonClicked;
if ModalResult=aButtonDef then
Dialog.Form.ActiveControl := CommandLink;
if aEmulateClassicStyle then begin
Font.Height := FontHeight - 2;
Font.Style := [fsBold]
end;
{$ifdef WITHUXTHEME}
if aEmulateClassicStyle then begin
Margin := 7;
Spacing := 7;
end else begin
Margin := 24;
Spacing := 10;
end;
if not (tdfUseCommandLinksNoIcon in aFlags) then
SetBitmap(BitmapArrow);
{$endif}
end;
end;
inc(Y,24);
finally
Free;
end;
// add radio buttons
if Radios<>'' then
with TStringList.Create do
try
Text := SysUtils.trim(Radios);
SetLength(Rad,Count);
for i := 0 to Count-1 do begin