88 lines
2.8 KiB
C#
88 lines
2.8 KiB
C#
|
#region PDFsharp - A .NET library for processing PDF
|
||
|
|
//
|
||
|
|
// Authors:
|
||
|
|
// Stefan Lange
|
||
|
|
//
|
||
|
|
// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
|
||
|
|
//
|
||
|
|
// http://www.pdfsharp.com
|
||
|
|
// http://sourceforge.net/projects/pdfsharp
|
||
|
|
//
|
||
|
|
// 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.
|
||
|
|
#endregion
|
||
|
|
|
||
|
|
using System;
|
||
|
|
using System.Collections;
|
||
|
|
using System.ComponentModel;
|
||
|
|
#if GDI
|
||
|
|
using System.Drawing;
|
||
|
|
using System.Windows.Forms;
|
||
|
|
#endif
|
||
|
|
#if Wpf
|
||
|
|
using System.Windows.Media;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if !GDI
|
||
|
|
#error This file must only be included in GDI build.
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace PdfSharp.Forms
|
||
|
|
{
|
||
|
|
/// <summary>
|
||
|
|
/// Implements the control that previews the page.
|
||
|
|
/// </summary>
|
||
|
|
class PagePreviewCanvas : System.Windows.Forms.Control
|
||
|
|
{
|
||
|
|
public PagePreviewCanvas(PagePreview preview)
|
||
|
|
{
|
||
|
|
_preview = preview;
|
||
|
|
SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer, true);
|
||
|
|
}
|
||
|
|
PagePreview _preview;
|
||
|
|
|
||
|
|
protected override void OnPaint(PaintEventArgs e)
|
||
|
|
{
|
||
|
|
if (!_preview._showPage)
|
||
|
|
return;
|
||
|
|
|
||
|
|
Graphics gfx = e.Graphics;
|
||
|
|
bool zoomChanged;
|
||
|
|
_preview.CalculatePreviewDimension(out zoomChanged);
|
||
|
|
_preview.RenderPage(gfx);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected override void OnPaintBackground(PaintEventArgs e)
|
||
|
|
{
|
||
|
|
if (!_preview._showPage)
|
||
|
|
{
|
||
|
|
e.Graphics.Clear(_preview._desktopColor);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
bool zoomChanged;
|
||
|
|
_preview.CalculatePreviewDimension(out zoomChanged);
|
||
|
|
_preview.PaintBackground(e.Graphics);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected override void OnSizeChanged(EventArgs e)
|
||
|
|
{
|
||
|
|
Invalidate();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|