{
rlsamp.pas
This file is part of the demo project for the TRtfLabel component:
http://flocke.vssd.de/prog/code/pascal/rtflabel/
Copyright (C) 2006 Volker Siebert <flocke@vssd.de>
All rights reserved.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
}
unit rlsamp;
interface
{$I ..\Rich3Conf.inc}
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
StdCtrls, ExtCtrls, RtfLabel;
type
TFormRtfLabelExample = class(TForm)
Memo1: TMemo;
Panel1: TPanel;
ScrollBox1: TScrollBox;
CheckBox1: TCheckBox;
CheckBox2: TCheckBox;
CheckBox3: TCheckBox;
CheckBox4: TCheckBox;
Button1: TButton;
Button2: TButton;
OpenDialog1: TOpenDialog;
PaintBox1: TPaintBox;
Label1: TLabel;
ComboBox1: TComboBox;
Panel2: TPanel;
Label2: TLabel;
ComboBox2: TComboBox;
procedure ScrollBox1Resize(Sender: TObject);
procedure PaintBox1Paint(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure CheckBox4Click(Sender: TObject);
procedure CheckBox3Click(Sender: TObject);
procedure CheckBox2Click(Sender: TObject);
procedure CheckBox1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure ComboBox1Click(Sender: TObject);
procedure ComboBox2Click(Sender: TObject);
procedure FormShow(Sender: TObject);
public
RtfLabel1: TRtfLabel;
procedure CreateLabel;
end;
var
FormRtfLabelExample: TFormRtfLabelExample;
implementation
{$R *.dfm}
uses
RichEditDll;
const
CDefaultText =
'{\rtf1\ansi\ansicpg1252' +
'{\colortbl ;\red255\green0\blue128;\red224\green255\blue0;}{'#13#10 +
'Enter your text here, using normal RTF code for markup ' +
'(\b bold\b0 , \i italic\i0 , '#13#10 +
'\ul underline\ul0 for example), ' +
'then press the {\b {\ul U}pdate} button\par'#13#10 +
'You can also press the {\cf1\b {\ul L}oad} button and ' +
'take a look at some of the sample files or '#13#10 +
'browse your {\fs36 {\super hard}{\sub disk} }and ' +
'{\highlight2\b pick some} of your own RTF files...' +
'}}';
procedure TFormRtfLabelExample.Button1Click(Sender: TObject);
begin
OpenDialog1.FileName := '';
if OpenDialog1.Execute then
begin
RtfLabel1.LoadFromFile(OpenDialog1.FileName);
try
// Text may be too long under Windows 95/98/ME
Memo1.Lines.Text := RtfLabel1.Caption;
except
MessageBeep(MB_ICONSTOP);
end;
end;
end;
procedure TFormRtfLabelExample.Button2Click(Sender: TObject);
begin
RtfLabel1.Invalidate;
RtfLabel1.Caption := Memo1.Lines.Text;
end;
procedure TFormRtfLabelExample.CheckBox1Click(Sender: TObject);
begin
RtfLabel1.Transparent := CheckBox1.Checked;
end;
procedure TFormRtfLabelExample.CheckBox2Click(Sender: TObject);
begin
RtfLabel1.Wordwrap := CheckBox2.Checked;
if RtfLabel1.Wordwrap then
RtfLabel1.Width := ScrollBox1.ClientWidth;
end;
procedure TFormRtfLabelExample.CheckBox3Click(Sender: TObject);
begin
if CheckBox3.Checked then
RtfLabel1.Padding.Rect := Rect(4, 4, 4, 4)
else
RtfLabel1.Padding.Rect := Rect(0, 0, 0, 0);
end;
procedure TFormRtfLabelExample.CheckBox4Click(Sender: TObject);
begin
RtfLabel1.AutoSize := CheckBox4.Checked;
if not RtfLabel1.AutoSize then
begin
RtfLabel1.Width := ScrollBox1.ClientWidth;
RtfLabel1.Height := ScrollBox1.ClientHeight;
end;
end;
procedure TFormRtfLabelExample.ComboBox1Click(Sender: TObject);
begin
RtfLabel1.Zoom := StrToIntDef(ComboBox1.Items[ComboBox1.ItemIndex], 100);
end;
procedure TFormRtfLabelExample.ComboBox2Click(Sender: TObject);
var
k: Integer;
v: TRichEditVersion;
begin
k := ComboBox2.ItemIndex;
v := TRichEditVersion(Integer(ComboBox2.Items.Objects[k]));
if v in UseRichEditVersions then
exit;
UseRichEditVersions := [v];
CreateLabel;
end;
procedure TFormRtfLabelExample.CreateLabel;
var
c: string;
l: TRtfLabel;
begin
if RtfLabel1 <> nil then
c := RtfLabel1.Caption
else
c := CDefaultText;
l := TRtfLabel.Create(Self);
with l do
begin
Parent := ScrollBox1;
Left := 0;
Top := 0;
Color := clYellow;
ParentFont := False;
Font.Name := 'Times New Roman';
Font.Size := 12;
Transparent := True;
AutoSize := False;
if RtfLabel1 <> nil then
begin
Width := RtfLabel1.Width;
Height := RtfLabel1.Height;
end;
Caption := c;
end;
if RtfLabel1 <> nil then
RtfLabel1.Free;
RtfLabel1 := l;
CheckBox1Click(CheckBox1);
CheckBox2Click(CheckBox2);
CheckBox3Click(CheckBox3);
CheckBox4Click(CheckBox4);
ComboBox1Click(ComboBox1);
end;
procedure TFormRtfLabelExample.FormCreate(Sender: TObject);
var
a: TRichEditVersions;
v, v1: TRichEditVersion;
s: string;
begin
if Screen.Fonts.IndexOf('Tahoma') >= 0 then
Font.Name := 'Tahoma';
{$IFDEF DELPHI_4_UP}
Constraints.MinWidth := (ComboBox2.Left + ComboBox2.Width) +
(ClientWidth - Panel2.Left) + Width - ClientWidth;
Constraints.MinHeight := ScrollBox1.Top + 48 + Height - ClientHeight;
{$ENDIF}
Icon.Assign(Application.Icon);
ComboBox1.ItemIndex := ComboBox1.Items.IndexOf(' 100');
a := AvailableRichEditModules;
v1 := rvNone;
for v := Low(TRichEditVersion) to High(TRichEditVersion) do
if v in a then
with RichEditModules[v] do
begin
//if v1 = rvNone then // uncomment to pick the smallest version available
v1 := v;
s := Format('%d.%d', [Version div 10, Version mod 10]);
ComboBox2.Items.AddObject(s, Pointer(Ord(v)));
end;
UseRichEditVersions := [v1];
v := GetRichEditModule;
with RichEditModules[v] do
s := Format('%d.%d', [Version div 10, Version mod 10]);
ComboBox2.ItemIndex := ComboBox2.Items.IndexOf(s);
UseRichEditVersions := [v];
Memo1.Lines.Text := CDefaultText;
CreateLabel;
end;
procedure TFormRtfLabelExample.FormShow(Sender: TObject);
begin
end;
procedure TFormRtfLabelExample.PaintBox1Paint(Sender: TObject);
var
X, Y, W, H: Integer;
begin
W := PaintBox1.ClientWidth;
H := PaintBox1.ClientHeight;
PaintBox1.Canvas.Pen.Color := RGB(224, 224, 244);
X := 10;
while X < W do
begin
PaintBox1.Canvas.MoveTo(X, 0);
PaintBox1.Canvas.LineTo(X, H);
inc(X, 10);
end;
Y := 10;
while Y < H do
begin
PaintBox1.Canvas.MoveTo(0, Y);
PaintBox1.Canvas.LineTo(W, Y);
inc(Y, 10);
end;
end;
procedure TFormRtfLabelExample.ScrollBox1Resize(Sender: TObject);
begin
if not RtfLabel1.AutoSize then
begin
RtfLabel1.Width := ScrollBox1.ClientWidth;
RtfLabel1.Height := ScrollBox1.ClientHeight;
end
else if RtfLabel1.Wordwrap then
RtfLabel1.Width := ScrollBox1.ClientWidth;
end;
end. |