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(*
History++ plugin for Miranda IM: the free IM client for Microsoft* Windows*
Copyright (C) 2006-2009 theMIROn, 2003-2006 Art Fedorov.
History+ parts (C) 2001 Christian Kastner
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
{-----------------------------------------------------------------------------
EmptyHistoryForm (historypp project)
Version: 1.0
Created: 15.03.2008
Author: theMIROn
[ Description ]
Empty history dialog
[ History ]
1.0 (15.04.08) First version.
[ Modifications ]
[ Known Issues ]
Contributors: theMIROn, Art Fedorov
-----------------------------------------------------------------------------}
unit EmptyHistoryForm;
interface
uses Windows, Classes, Controls, Graphics,
Forms, Buttons, StdCtrls, ExtCtrls,
// HistoryControls,
m_api;
type
TEmptyHistoryFrm = class(TForm)
btYes: TButton;
btNo: TButton;
paButtons: TPanel;
Image: TImage;
Text: TLabel;
procedure FormCreate(Sender: TObject);
procedure FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
procedure FormShow(Sender: TObject);
procedure btYesClick(Sender: TObject);
private
FContact: TMCONTACT;
procedure TranslateForm;
procedure PrepareForm;
procedure SetContact(const Value: TMCONTACT);
procedure EmptyHistory(hContact: TMCONTACT);
protected
function GetFormText: String;
public
property Contact: TMCONTACT read FContact write SetContact;
end;
implementation
uses
Math, SysUtils, HistoryForm,
hpp_global, hpp_forms, hpp_contacts, hpp_database, hpp_bookmarks;
{$R *.dfm}
function GetAveCharSize(Canvas: TCanvas): TPoint;
var
I: Integer;
Buffer: array[0..51] of WideChar;
tm: TTextMetric;
begin
for I := 0 to 25 do Buffer[I] := WideChar(I + Ord('A'));
for I := 0 to 25 do Buffer[I + 26] := WideChar(I + Ord('a'));
GetTextMetrics(Canvas.Handle, tm);
GetTextExtentPointW(Canvas.Handle, Buffer, 52, TSize(Result));
Result.X := (Result.X div 26 + 1) div 2;
Result.Y := tm.tmHeight;
end;
function TEmptyHistoryFrm.GetFormText: String;
var
DividerLine, ButtonCaptions: String;
I: integer;
begin
DividerLine := StringOfChar('-', 27) + sLineBreak;
for I := 0 to ComponentCount - 1 do
if Components[I] is TButton then
ButtonCaptions := ButtonCaptions +
TButton(Components[I]).Caption + StringOfChar(' ', 3);
ButtonCaptions := StringReplace(ButtonCaptions,'&','', [rfReplaceAll]);
Result := DividerLine + Caption + sLineBreak +
DividerLine + Text.Caption + sLineBreak +
DividerLine + ButtonCaptions + sLineBreak +
DividerLine;
end;
procedure TEmptyHistoryFrm.TranslateForm;
begin
Caption := TranslateUnicodeString(Caption);
btYes.Caption := TranslateUnicodeString(btYes.Caption);
btNo.Caption := TranslateUnicodeString(btNo.Caption);
end;
procedure TEmptyHistoryFrm.PrepareForm;
const
mcSpacing = 8;
mcButtonWidth = 50;
mcButtonHeight = 14;
mcButtonSpacing = 4;
var
DialogUnits: TPoint;
HorzSpacing, VertSpacing,
ButtonWidth, ButtonHeight, ButtonSpacing, ButtonGroupWidth,
IconTextWidth, IconTextHeight: Integer;
TextRect: TRect;
begin
DialogUnits := GetAveCharSize(Canvas);
HorzSpacing := MulDiv(mcSpacing, DialogUnits.X, 8);
VertSpacing := MulDiv(mcSpacing, DialogUnits.X, 4);
ButtonWidth := MulDiv(mcButtonWidth, DialogUnits.X, 4);
ButtonHeight := MulDiv(mcButtonHeight, DialogUnits.Y, 8);
ButtonSpacing := MulDiv(mcButtonSpacing, DialogUnits.X, 4);
SetRect(TextRect, 0, 0, Screen.Width div 2, 0);
DrawTextW(Canvas.Handle, PChar(Text.Caption),
Length(Text.Caption)+1, TextRect,
DT_EXPANDTABS or DT_CALCRECT or DT_WORDBREAK or
DrawTextBiDiModeFlagsReadingOnly);
IconTextWidth := Image.Width + HorzSpacing + TextRect.Right;
IconTextHeight := Max(Image.Height,TextRect.Bottom);
ButtonGroupWidth := ButtonWidth*2 + ButtonSpacing;
BorderWidth := VertSpacing;
ClientWidth := Max(IconTextWidth, ButtonGroupWidth);
ClientHeight := IconTextHeight + VertSpacing + paButtons.Height;
Text.SetBounds(Image.Width + HorzSpacing, 0,
TextRect.Right, TextRect.Bottom);
btYes.SetBounds((ClientWidth - ButtonGroupWidth) div 2,0, ButtonWidth, ButtonHeight);
btNo.SetBounds(btYes.Left + btYes.Width + ButtonSpacing,0, ButtonWidth, ButtonHeight);
end;
procedure TEmptyHistoryFrm.FormShow(Sender: TObject);
begin
TranslateForm;
PrepareForm;
end;
procedure TEmptyHistoryFrm.FormCreate(Sender: TObject);
var
NonClientMetrics: TNonClientMetrics;
begin
NonClientMetrics.cbSize := sizeof(NonClientMetrics);
if SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, @NonClientMetrics, 0) then
Font.Handle := CreateFontIndirect(NonClientMetrics.lfMessageFont);
MakeFontsParent(Self);
Canvas.Font := Font;
DoubleBuffered := True;
MakeDoubleBufferedParent(Self);
end;
procedure TEmptyHistoryFrm.FormKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
begin
if (Shift = [ssCtrl]) and (Key = Word('C')) then
begin
CopyToClip(GetFormText,CP_ACP);
Key := 0;
end;
end;
procedure TEmptyHistoryFrm.SetContact(const Value: TMCONTACT);
begin
FContact := Value;
Image.Picture.Icon.Handle := LoadIcon(0, IDI_QUESTION);
Text.Caption :=
TranslateW('Do you really want to delete ALL items for this contact?')+#10#13+
#10#13+
TranslateW('Note: It can take several minutes for large histories');
btYes.Default := true;
end;
procedure TEmptyHistoryFrm.EmptyHistory(hContact: TMCONTACT);
var
hDBEvent,prevhDbEvent: THandle;
begin
BookmarkServer.Contacts[hContact].Clear;
hDBEvent := db_event_last(hContact);
SetSafetyMode(False);
while hDBEvent <> 0 do
begin
prevhDbEvent := db_event_prev(hContact,hDBEvent);
if db_event_delete(hContact,hDBEvent) = 0 then
hDBEvent := prevhDbEvent
else
hDBEvent := 0;
end;
SetSafetyMode(True);
end;
procedure TEmptyHistoryFrm.btYesClick(Sender: TObject);
begin
if Assigned(Owner) and (Owner is THistoryFrm) then
THistoryFrm(Owner).EmptyHistory
else
EmptyHistory(FContact);
end;
end.
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