88 lines
2.8 KiB
C#
88 lines
2.8 KiB
C#
#region PDFsharp - A .NET library for processing PDF
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//
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// Authors:
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// Stefan Lange
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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// http://sourceforge.net/projects/pdfsharp
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Collections;
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using System.ComponentModel;
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#if GDI
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using System.Drawing;
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using System.Windows.Forms;
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#endif
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#if Wpf
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using System.Windows.Media;
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#endif
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#if !GDI
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#error This file must only be included in GDI build.
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#endif
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namespace PdfSharp.Forms
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{
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/// <summary>
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/// Implements the control that previews the page.
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/// </summary>
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class PagePreviewCanvas : System.Windows.Forms.Control
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{
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public PagePreviewCanvas(PagePreview preview)
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{
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_preview = preview;
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SetStyle(ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer, true);
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}
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PagePreview _preview;
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protected override void OnPaint(PaintEventArgs e)
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{
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if (!_preview._showPage)
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return;
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Graphics gfx = e.Graphics;
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bool zoomChanged;
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_preview.CalculatePreviewDimension(out zoomChanged);
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_preview.RenderPage(gfx);
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}
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protected override void OnPaintBackground(PaintEventArgs e)
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{
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if (!_preview._showPage)
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{
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e.Graphics.Clear(_preview._desktopColor);
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return;
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}
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bool zoomChanged;
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_preview.CalculatePreviewDimension(out zoomChanged);
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_preview.PaintBackground(e.Graphics);
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}
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protected override void OnSizeChanged(EventArgs e)
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{
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Invalidate();
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}
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}
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}
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