{
* This Source Code Form is subject to the terms of the Mozilla Public License,
* v. 2.0. If a copy of the MPL was not distributed with this file, You can
* obtain one at http://mozilla.org/MPL/2.0/
*
* Copyright (C) 2010-2013, Peter Johnson (www.delphidabbler.com).
*
* $Rev$
* $Date$
*
* Implements a frame containing a web browser control that is used to display
* the program's RSS news feed.
}
unit FrRSSNews;
interface
uses
// Delphi
OleCtrls, SHDocVw, Classes, Controls, ExtCtrls,
// Project
FrBrowserBase, UCSSBuilder;
type
{
TRSSNewsFrame:
Frame containing a web browser control that is used to display the program's
RSS news feed.
}
TRSSNewsFrame = class(TBrowserBaseFrame)
strict protected
procedure BuildCSS(const CSSBuilder: TCSSBuilder); override;
{Generates CSS classes specific to this frame. This CSS is added to that
provided by parent class.
@param CSSBuilder [in] Object used to build the CSS code.
}
public
constructor Create(AOwner: TComponent); override;
{Object constructor. Sets up object and configures web browser control.
@param AOwner [in] Component that owns frame.
}
procedure Initialise;
{Initialises browser control. Loads container HTML document.
}
procedure DisplayContent(const HTML: string);
{Displays HTML content as body of document currently loaded in the browser
control.
@param HTML [in] HTML ode to be displayed.
}
end;
implementation
uses
// Delphi
Graphics,
// Project
Browser.UUIMgr, UColours, UCSSUtils, UFontHelper, UNulDropTarget;
{$R *.dfm}
{ TRSSNewsFrame }
procedure TRSSNewsFrame.BuildCSS(const CSSBuilder: TCSSBuilder);
{Generates CSS classes specific to this frame. This CSS is added to that
provided by parent class.
@param CSSBuilder [in] Object used to build the CSS code.
}
var
ContentFont: TFont; // content font used to set CSS properties
begin
inherited;
ContentFont := TFont.Create;
try
TFontHelper.SetContentFont(ContentFont);
with CSSBuilder.AddSelector('body') do
begin
AddProperty(TCSS.BackgroundColorProp(clWindow));
AddProperty(TCSS.FontProps(ContentFont));
AddProperty(TCSS.MarginProp(3));
end;
with CSSBuilder.AddSelector('p') do
begin
AddProperty(TCSS.MarginProp(4, 0, 0, 0));
end;
with CSSBuilder.AddSelector('dt') do
begin
AddProperty(TCSS.MarginProp(0, 0, 4, 0));
AddProperty(TCSS.PaddingProp(4));
AddProperty(TCSS.BackgroundColorProp(clBtnFace));
AddProperty(TCSS.ColorProp(clBtnText));
end;
with CSSBuilder.AddSelector('dd') do
begin
AddProperty(TCSS.MarginProp(0, 0, 8, 20));
end;
with CSSBuilder.AddSelector('.message') do
begin
AddProperty(TCSS.TextAlignProp(ctaCenter));
AddProperty(TCSS.MarginProp(cssTop, 30));
AddProperty(TCSS.FontWeightProp(cfwBold));
end;
with CSSBuilder.AddSelector('.error-heading') do
begin
AddProperty(TCSS.ColorProp(clWarningText));
AddProperty(TCSS.FontWeightProp(cfwBold));
end;
with CSSBuilder.AddSelector('.error-message') do
begin
AddProperty(TCSS.MarginProp(cssLeft, 20));
end;
finally
ContentFont.Free;
end;
end;
constructor TRSSNewsFrame.Create(AOwner: TComponent);
{Object constructor. Sets up object and configures web browser control.
@param AOwner [in] Component that owns frame.
}
begin
inherited;
// Set up browser control
WBController.UIMgr.ScrollbarStyle := sbsNormal; // normal scroll bars
WBController.UIMgr.Show3dBorder := False; // we'll handle border
WBController.UIMgr.AllowTextSelection := False; // can't select text
WBController.UIMgr.DropTarget := // inhibit drag drop in dialog
TNulDropTarget.Create;
end;
procedure TRSSNewsFrame.DisplayContent(const HTML: string);
{Displays HTML content as body of document currently loaded in the browser
control.
@param HTML [in] HTML ode to be displayed.
}
begin
WBController.IOMgr.ReplaceExistingBodyHTML(HTML);
end;
procedure TRSSNewsFrame.Initialise;
{Initialises browser control. Loads container HTML document.
}
begin
WBController.IOMgr.NavigateToResource(HInstance, 'dlg-rssnews.html');
end;
end.