Customizing Page Settings in GDI+

This article has been excerpted from book "Graphics Programming with GDI+".

We have already discussed PageSetupDialog, which allows us to adjust page settings. This is all taken care of by the dialog internally. But what if we need a custom page setup dialog? Sometimes we won't want to use the default dialogs provided by Windows. For example, suppose we want to change the text of the dialog or don't want the user to have page selection or anything else that is not available on the default Windows dialogs.

The System.Drawing.Printing namespace also defines functionality to manage page settings programmatically.

The PageSettings Class

Page settings are the properties of a page that are being used when a page is printer, including colors, page margins, paper size, page bounds, and page resolution.

The PageSettings class represents page settings in the .NET Framework library. This class provides members to specify page settings. It is used by the Printdocument.DefultPageSettings property to specify the page settings of a PrintDocument object. Table 11.10 describes the properties of the PageSettings class.

Besides the properties described in Table 11.10, the PageSettings class provides three methods: Clone, CopyToHdevmode, and SetHdevmode. The Clone method simply creates a copy of the PageSettings object. CopyToHdevmode copies relevant information from the PageSettings object from the specified DEVMODE structure, and SetHdevmode copies relevant information to the PageSettings object from the specified DEVMODE structure. The DEVMODE structure is used by WIN32 programmers.

Page Margins

The Margins class represents a page margin in the .NET Framework library. It allows you to get the current page margin settings and set new margin settings. This class has four properties - Left, Right, Top, and Bottom – which represent the left, right, top, and bottom margins, respectively, in hundredths of an inch. This class is used by the Margins property of the PageSettings class. We will use this class and its members in our examples.

TABLE 11.10: PageSettings properties

Property	Description
Bounds	Returns the size of the page.
Color	Indicates whether the page should be printed in color. Both get and set. The default is determined by the printer.
Landscape	Indicates whether the page is printed in landscape or portrait orientation. Both get and set. The default is determined by the printer.
Margins	Identifies the page margins. Both get and set.
PaperSize	Identifies the paper size. Both get and set.
PaperSource	Identifies the paper source (a printer tray). Both get and set.
PrinterResolution	Identifies the printer resolution for the page. Both get and set.
PrinterSettings	Identifies the printer settings associated with the page. Both get and set.

Creating a Custom Paper Size

As mentioned earlier, the PaperSize class specifies the size and type of paper. You can create you own custom paper sizes. For example, Listing 11.37 creates a custom paper size with a height of 200 and width of 100.

LISTING 11.37: Creating a custom paper size

        //Create a custom paper size and add it to the list
        PaperSize customPaperSize = new PaperSize();
        customPaperSize.PaperName = "Custom Size";
        customPaperSize.Width = 100;

The PaperKind Enumeration

The PaperKind enumeration, as we saw earlier, is used by the Kind property to specify standard paper sizes. This enumeration has over 100 members. Among them are A2, A3, A3Extra, A3ExtraTransverse, A3Rotated, A3Transverse, A4, A5, A6, Custom, DCEnvelope, Executive, InviteEnvelope, ItalyEnvelope, JapanesePostCard, Ledger, Legal, LegalExtra, Letter, LetterExtra, LetterSmall, Standard10x11 (10x14, 10x17, 12x11, 15x11, 9x11), Statement, and Tabloid.

The PaperSourceKind Enumeration

The PaperSourceKind enumeration represents standard paper sources. Table 11.11 describes the members of the PaperSourceKind enumeration.

TABLE 11.11: PaperSoruceKind members

Member	Description
AutomaticFeed	Automatically fed paper
Cassette	A paper cassette
Custom	A printer-specific paper source
Envelope	An Envelope
FormSource	The printer's default input bin
LargeCapacity	The printer's large-capacity bin
LargeFormat	Large-format paper
Lower	The lower bin of a printer
Manual	Manually fed paper
ManualFeed	Manually fed envelope
Middle	The middle bin of a printer
SmallFormat	Small-format paper
TractorFeed	A tractor feed
Upper	The upper bin of a printer

Page Settings in Action

Now let's create an application that will allow us to get and set page settings. In this application we will create a custom dialog.

We start by creating a new Windows application in VS .NET. We add some controls to the form, with the result shown in Figure 11.22. The Available Printers combo box displays all available printers. The Size and Source combo boxes display paper sizes and sources, respectively. The Paper Orientation section indicates whether paper is oriented in landscape mode or portrait mode. The Paper Margins text boxes obviously represent left, right, top and bottom margins. The Bounds property is represented by the Bounds (Rectangle) text box. The Color Printing check box indicates whether the printer supports color printing. The Set Properties button allows us to enter new values in the controls.

The form's load event (see Listing 11.38) loads all the required PageSettings-related settings using the LoadPrinters, LoadPaperSizes, LoadPaperSources, and ReadOtherSettings methods.



FIGURE 11.22: The custom page settings dialog

LISTING 11.38: The form's load event handler

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            //Load all available printers
            LoadPrinters();
            //Load paper sizes
            LoadPaperSizes();
            //Load paper sources
            LoadPaperSources();
            //Load other settings
            ReadOtherSettings();
        }

The LoadPrinters, LoadPaperSizes, LoadPaperSoruces, and ReadOtherSettings methods are used to load printers, paper sizes, paper sources, and other properties, respectively. The LoadPrinters method is given in Listing 11.39. We simply read the InstalledPrinters property of PrinterSettings and add printer to the printersList combo box.

LISTING 11.39: Loading printers

        private void LoadPrinters()
        {
            //Load all avaiable printers
            foreach (String printer in
            PrinterSettings.InstalledPrinters)
            {
                printerList.Items.Add(printer.ToString());
            }
            printersList.Select(0, 1);
        }

The LoadPaperSizes method (see Listing 11.40), loads all available paper sizes to the combo box. We read the PaperSizes property of PrinterSettings and add the paper type to the combo box. Then we create a custom paper size and add this to the combo box as well. This example will give you an idea of how to create your own custom paper sizes.

LISTING 11.40: Loading paper sizes

        private void LoadPaperSizes()
        {
            PaperSizeCombo.DisplayMember = "PaperName";
            PrinterSettings settings = new PrinterSettings();
            //Get all paper sizes and add them to the combo box list
            foreach (PaperSize size in settings.PaperSizes)
            {
                PaperSizeCombo.Items.Add(size.Kind.ToString());
                //You can even read the paper name and all PaperSize properties by uncommenting these two lines:
                //PaperSizeCombo.Items.Add
                //(size.PaperName.ToString());
                //PaperSizeCombo.Items.Add (size.ToString());
            }
            //Create a custom paper size and add it to the list
            PaperSize customPaperSize =
            new PaperSize("Custom Size", 50, 100);
            //You can also change properties
            customPaperSize.PaperName = ""New Custo, Size";
            customPaperSize.Height = 200;
            customPaperSize.width = 100;
            //Don't assign the Kind property. It's read-only.
            //customPaperSize.Kind = PaperKind.A4;
            //Add custom size
            PaperSizeCombo.Items.Add(customPaperSize);
        }

The LoadPaperSources methods (see Listing 11.41), reads all available paper sources and adds them to the PaperSourceCombo combobox. We use the PaperSoruces property of PrinterSettings to read the paper sources.

LISTING 11.41: Loading paper sources

        private void LoadPaperSources()
        {
            PrinterSettings settings = new PrinterSettings();
            PaperSourceCombo.DisplayMember = "SourceName";
            //Add all paper sources to the combo box
            foreach (PaperSource source in settings.PaperSources)
            {
                PaperSourcesCombo.Items.Add(source.ToString());
                //You can even add Kind and SourceName
                //by uncommenting the following two lines:
                //PaperSourceCombo.Items.Add
                //(Source.Kind.ToString());
                //PaperSourceCombo.Items.Add
                //(source.SourceName.ToString());
            }
        }

The last method, ReadOtherSettnigs, reads other properties of a printer, such as whether it supports color, margins, and bounds. Listing 11.42 shows the ReadOtherSettings method.

LISTING 11.42: Loading other properties of a printer

        private void ReadOtherSettngs()
        {
            //Set other default properties
            PrinterSettings settings = new PrinterSettings();
            PageSettings pgSettings =
            settings.DefaultPageSettings;
            //Color printing
            if (pgSettnigs.Color)
                ColorPrintingBox.Checked = true;
            else
                ColorPrintingBox.Checked = false;
            //Page margins
            leftMarginBox.Text =
            pgSettings.Bound.Left.ToString();
            rightMarginBox.Text =
            pgSettings.Bound.Right.ToString();
            topMarginBox.Text =
            pgSettings.Bound.Top.ToString();
            bottomMarginBox.Text =
            pgSettings.Bound.Bottom.ToString();
            //Landscape or portrait
            if (pgSettings.Landscape)
                landscapeButton.Checked = true;
            else
                portraitButton.Checked = ture;
            //Bounds
            boundsTextBox.Text =
            pgSettings.Bounds.ToString();
        }

Note : Remember that you need to add a reference to the System.Drawing.Printing namespace to your application whenever you use classes from this namespace.



FIGURE 11.23: The PageSetupDialog sample in action

Now if we run the application, its form looks like Figure 11.23. Each of the Windows controls displays its intended property.

Finally, we want to save settings through the Set Properties button click and write code for a Cancel button. On the Set Properties button click, we set the properties using PrinterSettings. Make sure printer is available in the Available Printers combo box. The Cancel button simply closes the dialog.

The code for the Set Properties and Cancel button click event handlers is given in Listing 11.43, in which we set the page settings, color, and landscape properties of a page.

LISTING 11.43: Saving paper settings

        private void SetPropertiesBtn_click(object sender, System.EventArge e)
        {
            //Set other default properties
            PrinterSettings setting = new PrinterSettings();
            PageSettings pgSettings =
            settings.DefaultPageSettings;
            //Color printing?
            if (ColorPrintingBox.Checked)
                pgSettings.Color = true;
            else
                pgSettings.Color = false;
            //Landscape or portrait?

            if (landscapeButton.Checked)
                pgSettings.Landscape = true;
            else
                pgSettings.Landscape = false;
        }

        private void CancelBtn_Click(object sender, System.EventArgs e)
        {
            this.Close();
        }

The preceding discussion should enable you to customize page settings in the way that you want, instead of using the standard page settings dialog provided in the PageSettingsDialog class.

Note: Even though the printing facility defined in the System.Drawing.Printing namespace allows developers to customize the standard Windows dialogs, I recommend that you use the standard Windows dialogs unless you can't live without customizing them.

The PrintRange Enumeration

The PrintRange enumeration is used to specify the part of a document to print. This enumeration is used by the PrinterSettings and PrintDialog classes. Table 11.12 describes the members of the PrintRange enumeration.

You can use the PrintRange property of the PrinterSettings object to set the print range. Here's an example of code that does this:

PrinterSettings.PrintRange = PrintRange.SomePages;

TABLE 11.12: PrintRange members

Member	Description
AllPages	All pages are printed.
Selection	The selected pages are printed.
SomePages	The pages between FromPage and ToPage are printed.

Conclusion

Hope the article would have helped you in understanding Customizing Page Settings in GDI+. Read other articles on GDI+ on the website.

This book teaches .NET developers how to work with GDI+ as they develop applications that include graphics, or that interact with monitors or printers. It begins by explaining the difference between GDI and GDI+, and covering the basic concepts of graphics programming in Windows.