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ASCU_ALL/PdfSharp/Forms/PagePreview.cs

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2020-09-04 12:49:15 +05:00
#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
// Draw crosses to check layout calculation
#define DRAW_X_
#if DEBUG
// Test drawing in a bitmap. This is just a hack - don't use it!
#define DRAW_BMP_
#endif
using System;
using System.Diagnostics;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
using PdfSharp.Drawing;
#if !GDI
#error This file must only be included in GDI build.
#endif
namespace PdfSharp.Forms
{
/* TODOs
*
* o Call render event only once. -> introduce an UpdatePage() function
*
* Further stuff: set printable area; set text box (smallest rect that contains all content)
*/
/// <summary>
/// Represents a preview control for an XGraphics page. Can be used as an alternative to
/// System.Windows.Forms.PrintPreviewControl.
/// </summary>
public class PagePreview : UserControl
{
/// <summary>
/// A delegate for invoking the render function.
/// </summary>
public delegate void RenderEvent(XGraphics gfx);
private Container components = null;
/// <summary>
/// Initializes a new instance of the <see cref="PagePreview"/> class.
/// </summary>
public PagePreview()
{
_canvas = new PagePreviewCanvas(this);
Controls.Add(_canvas);
_hScrollBar = new HScrollBar();
_hScrollBar.Visible = _showScrollbars;
_hScrollBar.Scroll += OnScroll;
_hScrollBar.ValueChanged += OnValueChanged;
Controls.Add(_hScrollBar);
_vScrollBar = new VScrollBar();
_vScrollBar.Visible = _showScrollbars;
_vScrollBar.Scroll += OnScroll;
_vScrollBar.ValueChanged += OnValueChanged;
Controls.Add(_vScrollBar);
InitializeComponent();
//OnLayout();
_zoom = Zoom.FullPage;
_printableArea = new RectangleF();
//virtPageSize = new Size();
//showNonPrintableArea = false;
//virtualPrintableArea = new Rectangle();
_printableArea.GetType();
//showNonPrintableArea.GetType();
//virtualPrintableArea.GetType();
// Prevent bogus compiler warnings
_posOffset = new Point();
_virtualPage = new Rectangle();
}
readonly PagePreviewCanvas _canvas;
readonly HScrollBar _hScrollBar;
readonly VScrollBar _vScrollBar;
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (components != null)
components.Dispose();
}
base.Dispose(disposing);
}
/// <summary>
/// Gets or sets the border style of the control.
/// </summary>
/// <value></value>
[DefaultValue((int)BorderStyle.Fixed3D), Description("Determines the style of the border."), Category("Preview Properties")]
public new BorderStyle BorderStyle
{
get { return _borderStyle; }
set
{
if (!Enum.IsDefined(typeof(BorderStyle), value))
throw new InvalidEnumArgumentException("value", (int)value, typeof(BorderStyle));
if (value != _borderStyle)
{
_borderStyle = value;
LayoutChildren();
}
}
}
BorderStyle _borderStyle = BorderStyle.Fixed3D;
// [DefaultValue(2), Description("TODO..."), Category("Preview Properties")]
// public PageSize PageSize
// {
// get { return pageSize2; }
// set
// {
// if (!Enum.IsDefined(typeof(PageSize), value))
// throw new InvalidEnumArgumentException("value", (int)value, typeof(PageSize));
//
// if (value != pageSize2)
// {
// pageSize2 = value;
// // base.RecreateHandle();
// // integralHeightAdjust = true;
// // try
// // {
// // base.Height = requestedHeight;
// // }
// // finally
// // {
// // integralHeightAdjust = false;
// // }
// }
// }
// }
// PageSize pageSize2;
/// <summary>
/// Gets or sets the XGraphicsUnit of the page.
/// The default value is XGraphicsUnit.Point.
/// </summary>
public XGraphicsUnit PageGraphicsUnit
{
get { return _pageGraphicsUnit; }
set { _pageGraphicsUnit = value; }
}
XGraphicsUnit _pageGraphicsUnit = XGraphicsUnit.Point;
/// <summary>
/// This property was renamed. Use new property PageGraphicsUnit.
/// </summary>
[Obsolete("Property renamed, use PageGraphicsUnit")]
public XGraphicsUnit PageUnit
{
get { return _pageGraphicsUnit; }
set { _pageGraphicsUnit = value; }
}
/// <summary>
/// Gets or sets a predefined zoom factor.
/// </summary>
[DefaultValue((int)Zoom.FullPage), Description("Determines the zoom of the page."), Category("Preview Properties")]
public Zoom Zoom
{
get { return _zoom; }
set
{
if ((int)value < (int)Zoom.Mininum || (int)value > (int)Zoom.Maximum)
{
if (!Enum.IsDefined(typeof(Zoom), value))
throw new InvalidEnumArgumentException("value", (int)value, typeof(Zoom));
}
if (value != _zoom)
{
_zoom = value;
CalculatePreviewDimension();
SetScrollBarRange();
_canvas.Invalidate();
}
}
}
Zoom _zoom;
/// <summary>
/// Gets or sets an arbitrary zoom factor. The range is from 10 to 800.
/// </summary>
//[DefaultValue((int)Zoom.FullPage), Description("Determines the zoom of the page."), Category("Preview Properties")]
public int ZoomPercent
{
get { return _zoomPercent; }
set
{
if (value < (int)Zoom.Mininum || value > (int)Zoom.Maximum)
throw new ArgumentOutOfRangeException("value", value,
String.Format("Value must between {0} and {1}.", (int)Zoom.Mininum, (int)Zoom.Maximum));
if (value != _zoomPercent)
{
_zoom = (Zoom)value;
_zoomPercent = value;
CalculatePreviewDimension();
SetScrollBarRange();
_canvas.Invalidate();
}
}
}
int _zoomPercent;
/// <summary>
/// Gets or sets the color of the page.
/// </summary>
[Description("The background color of the page."), Category("Preview Properties")]
public Color PageColor
{
get { return _pageColor; }
set
{
if (value != _pageColor)
{
_pageColor = value;
Invalidate();
}
}
}
Color _pageColor = Color.GhostWhite;
/// <summary>
/// Gets or sets the color of the desktop.
/// </summary>
[Description("The color of the desktop."), Category("Preview Properties")]
public Color DesktopColor
{
get { return _desktopColor; }
set
{
if (value != _desktopColor)
{
_desktopColor = value;
Invalidate();
}
}
}
internal Color _desktopColor = SystemColors.ControlDark;
/// <summary>
/// Gets or sets a value indicating whether the scrollbars are visible.
/// </summary>
[DefaultValue(true), Description("Determines whether the scrollbars are visible."), Category("Preview Properties")]
public bool ShowScrollbars
{
get { return _showScrollbars; }
set
{
if (value != _showScrollbars)
{
_showScrollbars = value;
_hScrollBar.Visible = value;
_vScrollBar.Visible = value;
LayoutChildren();
}
}
}
bool _showScrollbars = true;
/// <summary>
/// Gets or sets a value indicating whether the page is visible.
/// </summary>
[DefaultValue(true), Description("Determines whether the page visible."), Category("Preview Properties")]
public bool ShowPage
{
get { return _showPage; }
set
{
if (value != _showPage)
{
_showPage = value;
_canvas.Invalidate();
}
}
}
internal bool _showPage = true;
/// <summary>
/// Gets or sets the page size in point.
/// </summary>
[Description("Determines the size (in points) of the page."), Category("Preview Properties")]
public XSize PageSize
{
get { return new XSize((int)_pageSize.Width, (int)_pageSize.Height); }
set
{
_pageSize = new SizeF((float)value.Width, (float)value.Height);
CalculatePreviewDimension();
Invalidate();
}
}
/// <summary>
/// This is a hack for Visual Studio 2008. The designer uses reflection for setting the PageSize property.
/// This fails, even an implicit operator that converts Size to XSize exits.
/// </summary>
public Size PageSizeF
{
get { return new Size(Convert.ToInt32(_pageSize.Width), Convert.ToInt32(_pageSize.Height)); }
set
{
_pageSize = value;
CalculatePreviewDimension();
Invalidate();
}
}
/// <summary>
/// Sets a delegate that is invoked when the preview wants to be painted.
/// </summary>
public void SetRenderFunction(Action<XGraphics> renderEvent)
{
_renderAction = renderEvent;
Invalidate();
}
Action<XGraphics> _renderAction;
/// <summary>
/// Sets a delegate that is invoked when the preview wants to be painted.
/// </summary>
[Obsolete("Use SetRenderFunction")]
public void SetRenderEvent(RenderEvent renderEvent)
{
_renderAction = new Action<XGraphics>(renderEvent);
Invalidate();
}
#region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
Name = "PagePreview";
Size = new System.Drawing.Size(228, 252);
}
#endregion
/// <summary>
/// Raises the ZoomChanged event when the zoom factor changed.
/// </summary>
protected virtual void OnZoomChanged(EventArgs e)
{
if (ZoomChanged != null)
ZoomChanged(this, e);
}
/// <summary>
/// Occurs when the zoom factor changed.
/// </summary>
public event EventHandler ZoomChanged;
/// <summary>
/// Paints the background with the sheet of paper.
/// </summary>
protected override void OnPaintBackground(PaintEventArgs e)
{
// Accurate drawing prevents flickering
Graphics gfx = e.Graphics;
Rectangle clientRect = ClientRectangle;
int d = 0;
switch (_borderStyle)
{
case BorderStyle.FixedSingle:
gfx.DrawRectangle(SystemPens.WindowFrame, clientRect.X, clientRect.Y, clientRect.Width - 1, clientRect.Height - 1);
d = 1;
break;
case BorderStyle.Fixed3D:
ControlPaint.DrawBorder3D(gfx, clientRect, Border3DStyle.Sunken);
d = 2;
break;
}
if (_showScrollbars)
{
int cxScrollbar = SystemInformation.VerticalScrollBarWidth;
int cyScrollbar = SystemInformation.HorizontalScrollBarHeight;
gfx.FillRectangle(new SolidBrush(BackColor),
clientRect.Width - cxScrollbar - d, clientRect.Height - cyScrollbar - d, cxScrollbar, cyScrollbar);
}
}
/// <summary>
/// Recalculates the preview dimension.
/// </summary>
protected override void OnSizeChanged(EventArgs e)
{
base.OnSizeChanged(e);
CalculatePreviewDimension();
SetScrollBarRange();
}
/// <summary>
/// Invalidates the canvas.
/// </summary>
protected override void OnInvalidated(InvalidateEventArgs e)
{
base.OnInvalidated(e);
_canvas.Invalidate();
}
/// <summary>
/// Layouts the child controls.
/// </summary>
protected override void OnLayout(LayoutEventArgs levent)
{
LayoutChildren();
}
void OnScroll(object obj, ScrollEventArgs e)
{
ScrollBar sc = obj as ScrollBar;
if (sc != null)
{
//Debug.WriteLine(String.Format("OnScroll: {0}, {1}", sc.Value, e.NewValue));
}
}
void OnValueChanged(object obj, EventArgs e)
{
ScrollBar sc = obj as ScrollBar;
if (sc != null)
{
//Debug.WriteLine(String.Format("OnValueChanged: {0}", sc.Value));
if (sc == _hScrollBar)
_posOffset.X = sc.Value;
else if (sc == _vScrollBar)
_posOffset.Y = sc.Value;
}
_canvas.Invalidate();
}
void LayoutChildren()
{
Invalidate();
Rectangle clientRect = ClientRectangle;
switch (_borderStyle)
{
case BorderStyle.FixedSingle:
clientRect.Inflate(-1, -1);
break;
case BorderStyle.Fixed3D:
clientRect.Inflate(-2, -2);
break;
}
int x = clientRect.X;
int y = clientRect.Y;
int cx = clientRect.Width;
int cy = clientRect.Height;
int cxScrollbar = 0;
int cyScrollbar = 0;
if (_showScrollbars && _vScrollBar != null && _hScrollBar != null)
{
cxScrollbar = _vScrollBar.Width;
cyScrollbar = _hScrollBar.Height;
_vScrollBar.Location = new Point(x + cx - cxScrollbar, y);
_vScrollBar.Size = new Size(cxScrollbar, cy - cyScrollbar);
_hScrollBar.Location = new Point(x, y + cy - cyScrollbar);
_hScrollBar.Size = new Size(cx - cxScrollbar, cyScrollbar);
}
if (_canvas != null)
{
_canvas.Location = new Point(x, y);
_canvas.Size = new Size(cx - cxScrollbar, cy - cyScrollbar);
}
}
/// <summary>
/// Calculates all values for drawing the page preview.
/// </summary>
internal void CalculatePreviewDimension(out bool zoomChanged)
{
// User may change display resolution while preview is running
Graphics gfx = Graphics.FromHwnd(IntPtr.Zero);
IntPtr hdc = gfx.GetHdc();
DeviceInfos devInfo = DeviceInfos.GetInfos(hdc);
gfx.ReleaseHdc(hdc);
gfx.Dispose();
int xdpiScreen = devInfo.LogicalDpiX;
int ydpiScreen = devInfo.LogicalDpiY;
//int cxScrollbar = SystemInformation.VerticalScrollBarWidth;
//int cyScrollbar = SystemInformation.HorizontalScrollBarHeight;
Rectangle rcCanvas = _canvas.ClientRectangle;
Zoom zoomOld = _zoom;
int zoomPercentOld = _zoomPercent;
// Border around virtual page in pixel.
const int leftBorder = 2;
const int rightBorder = 4; // because of shadow
const int topBorder = 2;
const int bottomBorder = 4; // because of shadow
const int horzBorders = leftBorder + rightBorder;
const int vertBorders = topBorder + bottomBorder;
// Calculate new zoom factor.
switch (_zoom)
{
case Zoom.BestFit:
BestFit:
//zoomPercent = Convert.ToInt32(25400.0 * (rcCanvas.Width - (leftBorder + rightBorder)) / (this.pageSize.Width * xdpiScreen));
_zoomPercent = (int)(7200f * (rcCanvas.Width - horzBorders) / (_pageSize.Width * xdpiScreen));
//--zoomPercent; // prevent round up errors
break;
case Zoom.TextFit:
// TODO: 'public Rectangle TextBox' property
goto BestFit;
//zoomPercent = LongFromReal (25400.0 / (_cxUsedPage + 0) *
// (rcWnd.CX () - 2 * cxScrollbar) / xdpiScreen) - 3;
//break;
case Zoom.FullPage:
{
//int zoomX = Convert.ToInt32(25400.0 / (pageSize.Width) *
// (rcCanvas.Width - (leftBorder + rightBorder)) / xdpiScreen);
//int zoomY = Convert.ToInt32(25400.0 / (pageSize.Height) *
// (rcCanvas.Height - (topBorder + bottomBorder)) / ydpiScreen);
int zoomX = (int)(7200f * (rcCanvas.Width - horzBorders) / (_pageSize.Width * xdpiScreen));
int zoomY = (int)(7200f * (rcCanvas.Height - vertBorders) / (_pageSize.Height * ydpiScreen));
_zoomPercent = Math.Min(zoomX, zoomY);
//--zoomPercent; // prevent round up errors
}
break;
case Zoom.OriginalSize:
_zoomPercent = (int)(0.5 + 200f / (devInfo.ScaleX + devInfo.ScaleY));
_zoomPercent = (int)(0.5 + 100f / devInfo.ScaleX);
break;
default:
_zoomPercent = (int)_zoom;
break;
}
// Bound to zoom limits
_zoomPercent = Math.Max(Math.Min(_zoomPercent, (int)Zoom.Maximum), (int)Zoom.Mininum);
if ((int)_zoom > 0)
_zoom = (Zoom)_zoomPercent;
// Size of page in preview window in pixel
_virtualPage.X = leftBorder;
_virtualPage.Y = topBorder;
_virtualPage.Width = (int)(_pageSize.Width * xdpiScreen * _zoomPercent / 7200);
_virtualPage.Height = (int)(_pageSize.Height * ydpiScreen * _zoomPercent / 7200);
//// 2540 := (25.4mm * 100%) / 1mm
//m_VirtualPrintableArea.X = (int)printableArea.X * this.zoomPercent * xdpiScreen / 2540;
//m_VirtualPrintableArea.Y = (int)printableArea.Y * this.zoomPercent * xdpiScreen / 2540;
//m_VirtualPrintableArea.Width = (int)printableArea.Width * this.zoomPercent * xdpiScreen / 2540;
//m_VirtualPrintableArea.Height = (int)printableArea.Height * this.zoomPercent * xdpiScreen / 2540;
// Border do not depend on zoom anymore
_virtualCanvas = new Size(_virtualPage.Width + horzBorders, _virtualPage.Height + vertBorders);
// Adjust virtual canvas to at least actual window size
if (_virtualCanvas.Width < rcCanvas.Width)
{
_virtualCanvas.Width = rcCanvas.Width;
_virtualPage.X = leftBorder + (rcCanvas.Width - horzBorders - _virtualPage.Width) / 2;
}
if (_virtualCanvas.Height < rcCanvas.Height)
{
_virtualCanvas.Height = rcCanvas.Height;
_virtualPage.Y = topBorder + (rcCanvas.Height - vertBorders - _virtualPage.Height) / 2;
}
zoomChanged = zoomOld != _zoom || zoomPercentOld != _zoomPercent;
if (zoomChanged)
OnZoomChanged(new EventArgs());
}
internal void CalculatePreviewDimension()
{
bool zoomChanged;
CalculatePreviewDimension(out zoomChanged);
}
internal bool RenderPage(Graphics gfx)
{
//delete m_RenderContext;
//m_RenderContext = new HdcRenderContext(wdc.m_hdc);
gfx.TranslateTransform(-_posOffset.X, -_posOffset.Y);
gfx.SetClip(new Rectangle(_virtualPage.X + 1, _virtualPage.Y + 1, _virtualPage.Width - 1, _virtualPage.Height - 1));
float scaleX = _virtualPage.Width / _pageSize.Width;
float scaleY = _virtualPage.Height / _pageSize.Height;
//gfx.SetSmoothingMode(SmoothingModeAntiAlias);
//PaintBackground(gfx);
#if DRAW_BMP
Matrix matrix = new Matrix();
matrix.Translate(virtualPage.X, virtualPage.Y);
matrix.Translate(-posOffset.X, -this.posOffset.Y);
//matrix.Scale(scaleX, scaleY);
gfx.Transform = matrix;
#if DRAW_X
gfx.DrawLine(Pens.Red, 0, 0, pageSize.Width, pageSize.Height);
gfx.DrawLine(Pens.Red, 0, pageSize.Height, pageSize.Width, 0);
#endif
if (renderEvent != null)
{
Bitmap bmp = new Bitmap(virtualPage.Width, this.virtualPage.Height, gfx);
Graphics gfx2 = Graphics.FromImage(bmp);
gfx2.Clear(pageColor);
gfx2.ScaleTransform(scaleX, scaleY);
gfx2.SmoothingMode = SmoothingMode.HighQuality;
XGraphics xgfx = XGraphics.FromGraphics(gfx2, new XSize(pageSize.Width, this.pageSize.Height));
try
{
renderEvent(xgfx);
gfx.DrawImage(bmp, 0, 0);
}
finally
{
bmp.Dispose();
}
}
#else
Matrix matrix = new Matrix();
matrix.Translate(_virtualPage.X, _virtualPage.Y);
matrix.Translate(-_posOffset.X, -_posOffset.Y);
matrix.Scale(scaleX, scaleY);
gfx.Transform = matrix;
#if DRAW_X
gfx.DrawLine(Pens.Red, 0, 0, pageSize.Width, pageSize.Height);
gfx.DrawLine(Pens.Red, 0, pageSize.Height, pageSize.Width, 0);
#endif
if (_renderAction != null)
{
gfx.SmoothingMode = SmoothingMode.HighQuality;
XGraphics xgfx = XGraphics.FromGraphics(gfx, new XSize(_pageSize.Width, _pageSize.Height), PageGraphicsUnit);
try
{
_renderAction(xgfx);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Exception");
}
}
#endif
// Old C++ stuff, may be useful later...
#if false
switch (m_mode)
{
case RenderModeDirect:
{
delete m_PreviewMetafile;
m_PreviewMetafile = NULL;
float cxPage = Metric::MillimetersToPoints(m_dimPage.cx / 10.0f);
float cyPage = Metric::MillimetersToPoints(m_dimPage.cy / 10.0f);
float scaleX = virtualPage.Width / cxPage;
float scaleY = virtualPage.Height / cyPage;
Graphics gfx(m_RenderContext);
gfx.SetSmoothingMode(SmoothingModeAntiAlias);
PaintBackground(gfx, &virtualPage);
Matrix matrix;
matrix.Translate((float)virtualPage.X, (float)virtualPage.Y);
matrix.Translate((float) - m_posOffset.x, (float) -m_posOffset.y);
matrix.Scale(scaleX, scaleY);
m_RenderContext->SetDefaultViewMatrix(&matrix);
gfx.ResetTransform();
if (m_PreviewRenderer && m_PreviewRenderer->CanRender())
m_PreviewRenderer->Render(&gfx, m_Page);
}
break;
case RenderModeMetafile:
{
Graphics gfx(m_RenderContext);
if (m_PreviewMetafile == NULL)
{
float cxPage = Metric::MillimetersToPoints(m_dimPage.cx / 10.0f);
float cyPage = Metric::MillimetersToPoints(m_dimPage.cy / 10.0f);
//float factor = 72.0f / 96.0f;
Rect rcLogicalPage(0, 0, (int)cxPage, (int)cyPage);
RectF rcFLogicalPage(0, 0, cxPage, cyPage);
//DeviceName devname;
//DESKTOP::QueryDefaultPrinter(devname); //HACK DRUCKER MUSS DA SEIN!
//DeviceMode devmode(devname);
//HDC hdc = ::CreateIC(devname.m_szDriver, devname.m_szDevice, devname.m_szOutput, devmode.m_pdm);
//HDC hdc = m_Graphics->GetHDC();
//HDC hdc = ::GetDC(NULL);
HDC hdc = ::CreateIC("DISPLAY", NULL, NULL, NULL);
float dpiX = gfx.GetDpiX();
float dpiY = gfx.GetDpiY();
// Even Petzold would be surprised about that...
// Display | LaserJet
// DPI 96 : 120 | 300
// physical device size in MM ---------------------------------------------
int horzSizeMM = ::GetDeviceCaps(hdc, HORZSIZE); // = 330 : 254 | 198 (not 210)
int vertSizeMM = ::GetDeviceCaps(hdc, VERTSIZE); // = 254 : 203 | 288 (hot 297)
// device size in pixel
int horzSizePixel = ::GetDeviceCaps(hdc, HORZRES); // = 1280 : 1280 | 4676
int vertSizePixel = ::GetDeviceCaps(hdc, VERTRES); // = 1024 : 1024 | 6814
// 'logical' device resolution in DPI
int logResX = ::GetDeviceCaps(hdc, LOGPIXELSX); // = 96 : 120 | 600
int logResY = ::GetDeviceCaps(hdc, LOGPIXELSY); // = 96 : 120 | 600
// physical pixel size in .01 MM units
// accidentally(?) the result of GetPhysicalDimension!
//float X1 = 100.0f * horzSizeMM / horzSizePixel; // = 25.781250 : 19.843750 | 4.2343884
//float Y1 = 100.0f * vertSizeMM / vertSizePixel; // = 24.804688 : 19.824219 | 4.2265925
// now we can get the 'physical' device resolution...
float phyResX = horzSizePixel / (horzSizeMM / 25.4f); // = 98.521210 : 128.00000 | 599.85052
float phyResY = vertSizePixel / (vertSizeMM / 25.4f); // = 102.40000 : 128.12611 | 600.95691
// ...and rescale the size of the meta rectangle.
float magicX = logResX / phyResX; // = 0.97440946 : 0.93750000 | 1.0002491
float magicY = logResY / phyResY; // = 0.93750000 : 0.93657720 | 0.99840766
// use A4 page in point
// adjust size of A4 page so that meta file fits with DrawImage...
RectF rcMagic(0, 0, magicX * cxPage, magicY * cyPage);
m_PreviewMetafile = new Metafile(hdc, rcMagic, MetafileFrameUnitPoint,
EmfTypeEmfPlusOnly, L"some description");
SizeF size;
float horzRes, vertRes;
float height, width;
MetafileHeader metafileHeader;
// GetPhysicalDimension returns physical size of a pixel in .01 MM units!!
m_PreviewMetafile->GetPhysicalDimension(&size);
horzRes = (float)m_PreviewMetafile->GetHorizontalResolution();
vertRes = (float)m_PreviewMetafile->GetVerticalResolution();
height = (float)m_PreviewMetafile->GetHeight();
width = (float)m_PreviewMetafile->GetWidth();
m_PreviewMetafile->GetMetafileHeader(&metafileHeader);
Graphics gfxMf(m_PreviewMetafile);
dpiX = gfxMf.GetDpiX();
dpiY = gfxMf.GetDpiY();
m_PreviewMetafile->GetPhysicalDimension(&size);
horzRes = (float)m_PreviewMetafile->GetHorizontalResolution();
vertRes = (float)m_PreviewMetafile->GetVerticalResolution();
height = (float)m_PreviewMetafile->GetHeight();
width = (float)m_PreviewMetafile->GetWidth();
m_PreviewMetafile->GetMetafileHeader(&metafileHeader);
gfxMf.SetPageUnit(UnitPoint);
if (m_PreviewRenderer && m_PreviewRenderer->CanRender())
m_PreviewRenderer->Render(&gfxMf, m_Page);
::DeleteDC(hdc);
}
if (m_PreviewMetafile)
{
gfx.SetSmoothingMode(SmoothingModeAntiAlias);
PaintBackground(gfx, &virtualPage);
//Matrix matrix(1, 0, 0, 1, (float) - m_posOffset.x, (float) - m_posOffset.y);
m_RenderContext->SetDefaultViewMatrix(&matrix);
gfx.ResetTransform();
gfx.DrawImage(m_PreviewMetafile, virtualPage);
}
}
break;
case RenderModeBitmap:
break;
}
#endif
return true;
}
/// <summary>
/// Paints the background and the empty page.
/// </summary>
internal void PaintBackground(Graphics gfx)
{
// Draw sharp paper borders and shadow.
gfx.SmoothingMode = SmoothingMode.None;
//gfx.SetCompositingMode(CompositingModeSourceOver); // CompositingModeSourceCopy
//gfx.SetCompositingQuality(CompositingQualityHighQuality);
gfx.TranslateTransform(-_posOffset.X, -_posOffset.Y);
// Draw outer area. Use clipping to prevent flickering of page interior.
gfx.SetClip(new Rectangle(_virtualPage.X, _virtualPage.Y, _virtualPage.Width + 3, _virtualPage.Height + 3), CombineMode.Exclude);
gfx.SetClip(new Rectangle(_virtualPage.X + _virtualPage.Width + 1, _virtualPage.Y, 2, 2), CombineMode.Union);
gfx.SetClip(new Rectangle(_virtualPage.X, _virtualPage.Y + _virtualPage.Height + 1, 2, 2), CombineMode.Union);
gfx.Clear(_desktopColor);
#if DRAW_X
gfx.DrawLine(Pens.Blue, 0, 0, virtualCanvas.Width, virtualCanvas.Height);
gfx.DrawLine(Pens.Blue, virtualCanvas.Width, 0, 0, virtualCanvas.Height);
#endif
gfx.ResetClip();
#if !DRAW_BMP
// Fill page interior.
SolidBrush brushPaper = new SolidBrush(_pageColor);
gfx.FillRectangle(brushPaper, _virtualPage.X + 1, _virtualPage.Y + 1, _virtualPage.Width - 1, _virtualPage.Height - 1);
#endif
//// draw non printable area
//if (m_ShowNonPrintableArea)
//{
//SolidBrush brushNPA(+DESKTOP::QuerySysColor((SYSCLR_3DLIGHT)) | 0xFF000000);
//
//gfx.FillRectangle(&brushNPA, virtualPage.X, virtualPage.Y, virtualPage.Width, rcPrintableArea.Y - virtualPage.Y);
//gfx.FillRectangle(&brushNPA, virtualPage.X, virtualPage.Y, rcPrintableArea.X - virtualPage.X, virtualPage.Height);
//gfx.FillRectangle(&brushNPA, rcPrintableArea.X + rcPrintableArea.Width,
//virtualPage.Y, virtualPage.X + virtualPage.Width - (rcPrintableArea.X + rcPrintableArea.Width), virtualPage.Height);
//gfx.FillRectangle(&brushNPA, virtualPage.X, rcPrintableArea.Y + rcPrintableArea.Height,
//virtualPage.Width, virtualPage.Y + virtualPage.Height - (rcPrintableArea.Y + rcPrintableArea.Height));
//}
//DrawDash(gfx, virtualPage);
// Draw page border and shadow.
Pen penPaperBorder = SystemPens.WindowText;
Brush brushShadow = SystemBrushes.ControlDarkDark;
gfx.DrawRectangle(penPaperBorder, _virtualPage);
gfx.FillRectangle(brushShadow, _virtualPage.X + _virtualPage.Width + 1, _virtualPage.Y + 2, 2, _virtualPage.Height + 1);
gfx.FillRectangle(brushShadow, _virtualPage.X + 2, _virtualPage.Y + _virtualPage.Height + 1, _virtualPage.Width + 1, 2);
}
/// <summary>
/// Check clipping rectangle calculations.
/// </summary>
[Conditional("DEBUG")]
void DrawDash(Graphics gfx, Rectangle rect)
{
Pen pen = new Pen(Color.GreenYellow, 1);
pen.DashStyle = DashStyle.Dash;
gfx.DrawRectangle(pen, rect);
}
/// <summary>
/// Adjusts scroll bars.
/// </summary>
void SetScrollBarRange()
{
// Windows 7 issue: Must invalidate scroll bars to ensure that
// the arrows are painted correctly.
Rectangle clientRect = _canvas.ClientRectangle;
Size clientAreaSize = clientRect.Size;
// Scroll range
int dx = _virtualCanvas.Width - clientAreaSize.Width;
int dy = _virtualCanvas.Height - clientAreaSize.Height;
//bool extendX = clientAreaSize.Width < virtualCanvas.Width;
//bool extendY = clientAreaSize.Height < virtualCanvas.Height;
if (ShowScrollbars && _hScrollBar != null)
{
if (_posOffset.X > dx)
_hScrollBar.Value = _posOffset.X = dx;
if (dx > 0)
{
_hScrollBar.Minimum = 0;
_hScrollBar.Maximum = _virtualCanvas.Width;
_hScrollBar.SmallChange = clientAreaSize.Width / 10;
_hScrollBar.LargeChange = clientAreaSize.Width;
_hScrollBar.Enabled = true;
}
else
{
_hScrollBar.Minimum = 0;
_hScrollBar.Maximum = 0;
_hScrollBar.Enabled = false;
}
_hScrollBar.Invalidate();
}
if (ShowScrollbars && _vScrollBar != null)
{
if (_posOffset.Y > dy)
_vScrollBar.Value = _posOffset.Y = dy;
if (dy > 0)
{
_vScrollBar.Minimum = 0;
_vScrollBar.Maximum = _virtualCanvas.Height;
_vScrollBar.SmallChange = clientAreaSize.Height / 10;
_vScrollBar.LargeChange = clientAreaSize.Height;
_vScrollBar.Enabled = true;
}
else
{
_vScrollBar.Minimum = 0;
_vScrollBar.Maximum = 0;
_vScrollBar.Enabled = false;
}
_vScrollBar.Invalidate();
}
}
///// <summary>
///// Calculates two interesting values...
///// </summary>
//public static void GetMagicValues(IntPtr hdc, out float magicX, out float magicY)
//{
// // Even Petzold would be surprised about that...
// // Physical device size in MM
// int horzSizeMM = GetDeviceCaps(hdc, HORZSIZE);
// int vertSizeMM = GetDeviceCaps(hdc, VERTSIZE);
// //
// // Display size in pixels 1600 x 1200 1280 x 1024
// //
// // My old Sony display with 96 DPI: --- 330 x 254
// // My old Sony display with 120 DPI: --- 254 x 203
// // My current Sony display with 96 DPI: 410 x 310 410 x 310
// // My current Sony display with 120 DPI: 410 x 310 410 x 310
// // My old Sony display with 96 DPI: --- 360 x 290
// // My old Sony display with 120 DPI: --- 360 x 290
// // My LaserJet 6L (300 DPI): 198 (not 210) x 288 (nscot 297)
// // Device size in pixel
// int horzSizePixel = GetDeviceCaps(hdc, HORZRES);
// int vertSizePixel = GetDeviceCaps(hdc, VERTRES);
// //
// // Display size in pixels 1600 x 1200 1280 x 1024
// //
// // My old Sony display with 96 DPI: --- 1280 x 1024
// // My old Sony display with 120 DPI: --- 1280 x 1024
// // My current Sony display with 96 DPI: 1600 x 1200 1280 x 1024
// // My current Sony display with 120 DPI: 1600 x 1200 1280 x 1024
// //
// // My LaserJet 6L (600 DPI): 4676 x 6814
// // 'logical' device resolution in DPI
// int logResX = GetDeviceCaps(hdc, LOGPIXELSX);
// int logResY = GetDeviceCaps(hdc, LOGPIXELSY);
// //
// // Display size in pixels 1600 x 1200 1280 x 1024
// //
// // My old Sony display with 96 DPI: --- 96 x 96
// // My old Sony display with 120 DPI: --- 120 x 120
// // My current Sony display with 96 DPI: 96 x 96 96 x 96
// // My current Sony display with 120 DPI: 120 x 120 120 x 120
// //
// // My LaserJet 6L (600 DPI): 600 x 600
// // physical pixel size in .01 MM units
// // accidentally(?) the result of GetPhysicalDimension!
// //float X1 = 100.0f * horzSizeMM / horzSizePixel; // = 25.781250 : 19.843750 | 4.2343884
// //float Y1 = 100.0f * vertSizeMM / vertSizePixel; // = 24.804688 : 19.824219 | 4.2265925
// // Now we can get the 'physical' device resolution...
// float phyResX = horzSizePixel / (horzSizeMM / 25.4f);
// float phyResY = vertSizePixel / (vertSizeMM / 25.4f);
// //
// // Display size in pixels 1600 x 1200 1280 x 1024
// //
// // My old Sony display with 96 DPI: --- 98.521210 x 102.40000
// // My old Sony display with 120 DPI: --- 128.00000 x 128.12611
// // My current Sony display with 96 DPI: 99.12195 x 98.32258 79.29756 x 83.90193
// // My current Sony display with 120 DPI: 99.12195 x 98.32258 79.29756 x 83.90193
// //
// // My LaserJet 6L (600 DPI): 599.85052 x 600.95691
// // ...and rescale the size of the meta rectangle.
// magicX = logResX / phyResX;
// magicY = logResY / phyResY;
// //
// // Display size in pixels 1600 x 1200 1280 x 1024
// //
// // My old Sony display with 96 DPI: --- 0.97440946 x 0.93750000
// // My old Sony display with 120 DPI: --- 0.93750000 x 0.93657720
// // My current Sony display with 96 DPI: 0.968503952 x 0.976377964 1.21062994 x 1.14419293
// // My current Sony display with 120 DPI: 1.21062994 x 1.22047246 1.51328743 x 1.43024123
// //
// // My LaserJet 6L (600 DPI): 1.0002491 x 0.99840766
//}
//[DllImport("gdi32.dll")]
//static extern int GetDeviceCaps(IntPtr hdc, int capability);
//const int HORZSIZE = 4;
//const int VERTSIZE = 6;
//const int HORZRES = 8;
//const int VERTRES = 10;
//const int LOGPIXELSX = 88;
//const int LOGPIXELSY = 90;
/// <summary>
/// Upper left corner of scroll area.
/// </summary>
Point _posOffset;
/// <summary>
/// Real page size in point.
/// </summary>
SizeF _pageSize = PageSizeConverter.ToSize(PdfSharp.PageSize.A4).ToSizeF();
/// <summary>
/// Page in pixel relative to virtual canvas.
/// </summary>
Rectangle _virtualPage;
/// <summary>
/// The size in pixels of an area that completely contains the virtual page and at least a small
/// border around it. If this area is larger than the canvas window, it is scrolled.
/// </summary>
Size _virtualCanvas;
/// <summary>
/// Printable area in point.
/// </summary>
readonly RectangleF _printableArea;
}
}
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