X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/880efa2a137ce3e3f39236d0dc85f5d2dacdda12..6d6de9f10f812d5e375d1283b12db490a6477b08:/docs/doxygen/overviews/richtextctrl.h diff --git a/docs/doxygen/overviews/richtextctrl.h b/docs/doxygen/overviews/richtextctrl.h index 6f3dd7ea4b..9203214d50 100644 --- a/docs/doxygen/overviews/richtextctrl.h +++ b/docs/doxygen/overviews/richtextctrl.h @@ -3,7 +3,7 @@ // Purpose: topic overview // Author: wxWidgets team // RCS-ID: $Id$ -// Licence: wxWindows license +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// /** @@ -17,6 +17,8 @@ @li @ref overview_richtextctrl_styles @li @ref overview_richtextctrl_dialogs @li @ref overview_richtextctrl_impl +@li @ref overview_richtextctrl_nested_object +@li @ref overview_richtextctrl_context_menus @li @ref overview_richtextctrl_roadmap @@ -58,7 +60,7 @@ editing, wxStyledTextCtrl is a better choice. Despite its name, it cannot currently read or write RTF (rich text format) files. Instead, it uses its own XML format, and can also read and write plain -text. In future we expect to provide RTF file capabilities. Custom file formats +text. In future we expect to provide RTF or OpenDocument file capabilities. Custom file formats can be supported by creating additional file handlers and registering them with the control. @@ -250,7 +252,8 @@ between controls. @section overview_richtextctrl_styles Text Styles -Styling attributes are represented by wxTextAttr. +Styling attributes are represented by wxTextAttr, or for more control over +attributes such as margins and size, the derived class wxRichTextAttr. When setting a style, the flags of the attribute object determine which attributes are applied. When querying a style, the passed flags are ignored @@ -351,7 +354,8 @@ editing functionality. wxRichTextFormattingDialog can be used for character or paragraph formatting, or a combination of both. It's a wxPropertySheetDialog with the following -available tabs: Font, Indents @& Spacing, Tabs, Bullets, Style, and List Style. +available tabs: Font, Indents @& Spacing, Tabs, Bullets, Style, Borders, +Margins, Background, Size, and List Style. You can select which pages will be shown by supplying flags to the dialog constructor. In a character formatting dialog, typically only the Font page will be shown. In a paragraph formatting dialog, you'll show the Indents @& @@ -380,7 +384,7 @@ has one such buffer. The content is represented by a hierarchy of objects, all derived from wxRichTextObject. An object might be an image, a fragment of text, a paragraph, -or a whole buffer. Objects store a wxTextAttr containing style information; a +or a further composite object. Objects store a wxRichTextAttr containing style information; a paragraph object can contain both paragraph and character information, but content objects such as text can only store character information. The final style displayed in the control or in a printout is a combination of base style, @@ -412,6 +416,54 @@ objects with the same style where just one would do. So a Defragment function is called when updating the control's display, to ensure that the minimum number of objects is used. +@section overview_richtextctrl_nested_object Nested Objects + +wxRichTextCtrl supports nested objects such as text boxes and tables. To achieve +compatibility with the existing API, there is the concept of @e object @e focus. +When the user clicks on a nested text box, the object focus is set to that +container object so all keyboard input and API functions apply to that +container. The application can change the focus using wxRichTextCtrl::SetObjectFocus. +Call this function with a @null parameter to set the focus back to the top-level +object. + +An event will be sent to the control when the focus changes. + +When the user clicks on the control, wxRichTextCtrl determines which container to set +as the current object focus by calling the found container's overrided wxRichTextObject::AcceptsFocus +function. For example, although a table is a container, it must not itself be +the object focus because there is no text editing at the table level. Instead, a cell +within the table must accept the focus. + +Since with nested objects it is not possible to represent a section with merely +a start position and an end position, the class wxRichTextSelection is provided +which stores multiple ranges (for non-contiguous selections such as table cells) and +a pointer to the container object in question. You can pass wxRichTextSelection +to wxRichTextCtrl::SetSelection or get an instance of it from wxRichTextCtrl::GetSelection. + +When selecting multiple objects, such as cell tables, the wxRichTextCtrl dragging handler code calls the +function wxRichTextObject::HandlesChildSelections to determine whether the children +can be individual selections. Currently only table cells can be multiply-selected +in this way. + +@section overview_richtextctrl_context_menus Context menus and property dialogs + +There are three ways you can make use of context menus: you can let wxRichTextCtrl handle everything and provide a basic menu; +you can set your own context menu using wxRichTextCtrl::SetContextMenu but let wxRichTextCtrl handle showing it and adding property items; +or you can override the default context menu behaviour by adding a context menu event handler +to your class in the normal way. + +If you right-click over a text box in cell in a table, you may want to edit the properties of +one of these objects - but which properties will you be editing? + +Well, the default behaviour allows up to three property-editing menu items simultaneously - for the object clicked on, +the container of that object, and the container's parent (depending on whether any of these +objects return @true from their wxRichTextObject::CanEditProperties functions). +If you supply a context menu, add a property command item using the wxID_RICHTEXT_PROPERTIES1 identifier, +so that wxRichTextCtrl can find the position to add command items. The object should +tell the control what label to use by returning a string from wxRichTextObject::GetPropertiesMenuLabel. + +Since there may be several property-editing commands showing, it is recommended that you don't +include the word Properties - just the name of the object, such as Text Box or Table. @section overview_richtextctrl_roadmap Development Roadmap @@ -433,17 +485,17 @@ This is an incomplete list of bugs. This is a list of some of the features that have yet to be implemented. Help with them will be appreciated. -@li RTF input and output -@li Conversion from HTML +@li support for composite objects in some functions where it's not yet implemented, for example ApplyStyleSheet +@li Table API enhancements and dialogs; improved table layout especially row spans and fitting +@li Conversion from HTML, and a rewrite of the HTML output handler that includes CSS, +tables, text boxes, and floating images, in addition to a simplified-HTML mode for wxHTML compatibility @li Open Office input and output -@li Floating images, with content wrapping around them +@li RTF input and output @li A ruler control @li Standard editing toolbars -@li Tables @li Bitmap bullets -@li Borders -@li Text frames @li Justified text, in print/preview at least +@li scaling: either everything scaled, or rendering using a custom reference point size and an optional dimension scale There are also things that could be done to take advantage of the underlying text capabilities of the platform; higher-level text formatting APIs are