View mode dialog

This tutorial only applies to Xamarin.Android.

ViewModePickerDialogFragment allows users to: pick page layout mode, select page color mode, rotate pages, and crop pages.

Show view mode dialog

To show a view mode dialog in your activity, create a new instance of ViewModePickerDialogFragment by calling newInstance(PagePresentationMode, boolean, boolean, int):

C#

public void ShowViewModeDialog()
{
    var viewModeDialog = pdftron.PDF.Dialog.ViewModePickerDialogFragment.NewInstance(mPdfViewCtrl.PagePresentationMode,
      false, mReflowControl.Visibility == ViewStates.Visible, 0);
    viewModeDialog.SetStyle((int)DialogFragmentStyle.Normal, Resource.Style.PDFTronAppTheme);
    viewModeDialog.Show(this.SupportFragmentManager, "view_mode_picker");
}

Set view mode dialog listener

In order to let users pick PDF page presentation mode, color mode, etc. you need to implement the corresponding events in the ViewModePickerDialogFragment instance.

C#

viewModeDialog.CustomColorModeSelected += (sender, e) =>
{
    // save the selection so we can retrieve it next time
    PdfViewCtrlSettingsManager.SetCustomColorModeBGColor(this, e.BgColor);
    PdfViewCtrlSettingsManager.SetCustomColorModeTextColor(this, e.TxtColor);
    PdfViewCtrlSettingsManager.SetColorMode(this, PdfViewCtrlSettingsManager.KeyPrefColorModeCustom);
    // Do something with e.BgColor and e.TxtColor
};

viewModeDialog.ViewModeColorSelected += (sender, e) =>
{
    // save the selection so we can retrieve it next time
    PdfViewCtrlSettingsManager.SetColorMode(this, e.ColorMode);
    // Do something with e.ColorMode
};

viewModeDialog.ViewModeSelected += (sender, e) =>
{
    // Do something with e.ViewMode
};

In ViewModeSelected, the selected view mode values are defined in PdfViewCtrlSettingsManager and include the following:

View Mode	Description	Value
KEY_PREF_VIEWMODE_CONTINUOUS_VALUE	Single page in continuous mode is selected.	"continuous"
KEY_PREF_VIEWMODE_SINGLEPAGE_VALUE	Single page presentation mode is selected.	"singlepage"
KEY_PREF_VIEWMODE_FACING_VALUE	Facing two pages presentation mode is selected.	"facing"
KEY_PREF_VIEWMODE_FACINGCOVER_VALUE	Facing two pages with odd page number on right side of PDF is selected.	"facingcover"
KEY_PREF_VIEWMODE_FACING_CONT_VALUE	In continuous mode, Facing two pages presentation mode is selected.	"facing_cont"
KEY_PREF_VIEWMODE_FACINGCOVER_CONT_VALUE	In continuous mode, Facing two pages with odd page number on right side of PDF is selected.	"facingcover_cont"
KEY_PREF_VIEWMODE_ROTATION_VALUE	Rotate pdf pages is selected.	"rotation"
KEY_PREF_VIEWMODE_USERCROP_VALUE	User-level crop pages is selected.	"user_crop"

To learn about setting page presentation mode, see PDFViewCtrl page presentation mode .

To learn about setting page color mode, see PDFViewCtrl color modes .

To learn about reflow, see reflow .

To learn about cropping pages, see crop page dialog .