- // You might use THIS code if you were scaling
- // graphics of known size to fit on the page.
-
- // We know the graphic is 200x200. If we didn't know this,
- // we'd need to calculate it.
- float maxX = 200;
- float maxY = 200;
-
- // Let's have at least 50 device units margin
- float marginX = 50;
- float marginY = 50;
-
- // Add the margin to the graphic size
- maxX += (2*marginX);
- maxY += (2*marginY);
-
- // Get the size of the DC in pixels
- int w, h;
- dc->GetSize(&w, &h);
-
- // Calculate a suitable scaling factor
- float scaleX=(float)(w/maxX);
- float scaleY=(float)(h/maxY);
-
- // Use x or y scaling factor, whichever fits on the DC
- float actualScale = wxMin(scaleX,scaleY);
-
- // Calculate the position on the DC for centring the graphic
- float posX = (float)((w - (200*actualScale))/2.0);
- float posY = (float)((h - (200*actualScale))/2.0);
-
- // Set the scale and origin
- dc->SetUserScale(actualScale, actualScale);
- dc->SetDeviceOrigin( (long)posX, (long)posY );
-
- frame->Draw(*dc);
+ // You might use THIS code if you were scaling graphics of known size to fit
+ // on the page. The commented-out code illustrates different ways of scaling
+ // the graphics.
+
+ // We know the graphic is 230x350. If we didn't know this, we'd need to
+ // calculate it.
+ wxCoord maxX = 230;
+ wxCoord maxY = 350;
+
+ // This sets the user scale and origin of the DC so that the image fits
+ // within the paper rectangle (but the edges could be cut off by printers
+ // that can't print to the edges of the paper -- which is most of them. Use
+ // this if your image already has its own margins.
+// FitThisSizeToPaper(wxSize(maxX, maxY));
+// wxRect fitRect = GetLogicalPaperRect();
+
+ // This sets the user scale and origin of the DC so that the image fits
+ // within the page rectangle, which is the printable area on Mac and MSW
+ // and is the entire page on other platforms.
+// FitThisSizeToPage(wxSize(maxX, maxY));
+// wxRect fitRect = GetLogicalPageRect();
+
+ // This sets the user scale and origin of the DC so that the image fits
+ // within the page margins as specified by g_PageSetupData, which you can
+ // change (on some platforms, at least) in the Page Setup dialog. Note that
+ // on Mac, the native Page Setup dialog doesn't let you change the margins
+ // of a wxPageSetupDialogData object, so you'll have to write your own dialog or
+ // use the Mac-only wxMacPageMarginsDialog, as we do in this program.
+ FitThisSizeToPageMargins(wxSize(maxX, maxY), *g_pageSetupData);
+ wxRect fitRect = GetLogicalPageMarginsRect(*g_pageSetupData);
+
+ // This sets the user scale and origin of the DC so that the image appears
+ // on the paper at the same size that it appears on screen (i.e., 10-point
+ // type on screen is 10-point on the printed page) and is positioned in the
+ // top left corner of the page rectangle (just as the screen image appears
+ // in the top left corner of the window).
+// MapScreenSizeToPage();
+// wxRect fitRect = GetLogicalPageRect();
+
+ // You could also map the screen image to the entire paper at the same size
+ // as it appears on screen.
+// MapScreenSizeToPaper();
+// wxRect fitRect = GetLogicalPaperRect();
+
+ // You might also wish to do you own scaling in order to draw objects at
+ // full native device resolution. In this case, you should do the following.
+ // Note that you can use the GetLogicalXXXRect() commands to obtain the
+ // appropriate rect to scale to.
+// MapScreenSizeToDevice();
+// wxRect fitRect = GetLogicalPageRect();
+
+ // Each of the preceding Fit or Map routines positions the origin so that
+ // the drawn image is positioned at the top left corner of the reference
+ // rectangle. You can easily center or right- or bottom-justify the image as
+ // follows.
+
+ // This offsets the image so that it is centered within the reference
+ // rectangle defined above.
+ wxCoord xoff = (fitRect.width - maxX) / 2;
+ wxCoord yoff = (fitRect.height - maxY) / 2;
+ OffsetLogicalOrigin(xoff, yoff);
+
+ // This offsets the image so that it is positioned at the bottom right of
+ // the reference rectangle defined above.
+// wxCoord xoff = (fitRect.width - maxX);
+// wxCoord yoff = (fitRect.height - maxY);
+// OffsetLogicalOrigin(xoff, yoff);
+
+ frame->Draw(*GetDC());
projects / wxWidgets.git / blobdiff