CSS

Under Construction

Introduction

Lianja Apps can be styled using CSS to your preferred theme or themes.

Defining

Use the CSS Style Attribute in the App Inspector Attributes tab or Attributes Dialog to specify the CSS properties.

CSS Style can be set to the name of a CSS file.

Use the 'app:/' prefix for a CSS file in the App:

CSS Style: app:/myapp.css

and the 'lib:/' prefix for a CSS file in the library.

CSS Style: lib:/myapp.css

The CSS file can contain CSS property definitions for a single UI element, multiple elements or for the whole App or multiple Apps. In the App Settings, the App CSS Style file will be created in the library by default, allowing the same CSS file to be used by multiple Apps.

Alternatively, CSS Style can be set to a character string. Each property definition is terminated with a semi-colon (;), for example:

CSS Style: border: 2px solid green; font: bold italic large "Times New Roman";

To access CSS Style in code using setAttribute() and getAttribute() the attribute name is cssStyle.

Lianja.get("page1.section1.field1").setAttribute('cssStyle','border: 2px solid green; font: bold italic large "Times New Roman";')

? Lianja.get("page1.section1.field1").getAttribute('cssStyle')

As well as the primary CSS Style attribute the following sub-component styles can also be defined (the setAttribute() / getAttribute() attribute names are shown in brackets where available):

App:

Page defaults:
- Navigation bar CSS
- Page menu CSS
Section defaults:
- Header CSS
- Section CSS

Page:

Navigation Panel: CSS Style (leftSidebarTreeStylesheet)

Section:

Header: Header CSS Style (headerCssStyle)
Subtitle: CSS Style (subtitleCssStyle)
Footer: Footer button CSS (footerButtonCss)

Checklistview Gadget:

Data: CSS Style (gadgetCssStyle)

Grid Gadget:

Data: CSS Style (gadgetCssStyle)

Treeview Gadget:

Data: CSS Style (gadgetCssStyle)

Listview Gadget:

Data: CSS Style (gadgetCssStyle)

Custom Sections and Custom Gadgets

In Custom Sections and Custom Gadgets using the Lianja UI Framework, the equivalent property is stylesheet (css is also supported).

Selectors

In CSS files, selectors define the individual object or type of object to be styled.

Universal Selector

The asterisk (*) selects all objects.

It can be used on its own:

* {
	font:italic bold 12px/30px Georgia, serif;
}

or following an ID or Type selector to specify that properties should be cascaded to all objects lower in the hierarchy:

lianja_ui_page * {
	font: italic bold 12px/30px Georgia, serif;	
	background:black;
	color:white;
}

or preceding a Property selector to specify that it should apply to all objects with that property value:

* [user_attr1="16"] {
	border: 20px solid red; 
}

Note that this is the default behavior, so the * is not required.

ID Selectors

The ID selector for a named object is #id, for example:

#page1_section1_field1

In an App, each UI element is given a unique object id.

Page: pageid (Page 'name' attribute).

Section: pageid + "_" + sectionid (Section 'name' attribute).

Formitem: pageid + "_" + sectionid + "_" + formitemid (Form Section Field/Gadget or Canvas Section Advanced Control 'name' attribute).

#page1 * {
	background:black;
	color:green;
}
#page1_section1 * {
	background:blue;
	color:red;
}
#page1_section1_field1 * {
	background:red;
	color:yellow;
}

In Custom Sections and Custom Gadgets using the Lianja UI Framework, the elements use the name property that you assign to them.

#nShipperID {
	background:blue;
	color:yellow;
}

Type Selectors

Pages, Sections and Formitems

The following selectors can be used for Lianja Pages, Sections and Formitems (Fields, Gadgets, Advanced Controls):

lianja_ui_page

[lianja_ui_page_footer]

[lianja_ui_page_header]

[lianja_ui_page_panel]

lianja_ui_section

[lianja_ui_section_footer]

lianja_ui_section_formitem

[lianja_ui_section_formitem_data]

[lianja_ui_section_formitem_divider]

[lianja_ui_section_formitem_gadget]

[lianja_ui_section_formitem_label]

[lianja_ui_section_formitem_separator]

[lianja_ui_section_formitem_subtitle]

UI Framework

lianja_ui_checkbox

lianja_ui_combobox

lianja_ui_commandbutton

lianja_ui_container

lianja_ui_control

lianja_ui_datetextbox

lianja_ui_datetimetextbox

lianja_ui_editbox

lianja_ui_editor

lianja_ui_form

lianja_ui_grid

Sub-control: lianja_ui_grid::item

lianja_ui_header

lianja_ui_label

lianja_ui_listbox

lianja_ui_menu

lianja_ui_menubar

lianja_ui_menuitem

lianja_ui_navbar

lianja_ui_optionbutton

lianja_ui_pageframe

lianja_ui_pagesidebar

lianja_ui_popupmenu

lianja_ui_progressbar

lianja_ui_richeditbox

lianja_ui_spinner

lianja_ui_splitter

lianja_ui_tabpage

lianja_ui_textbox

lianja_ui_toolbar

lianja_ui_toolbox

lianja_ui_tree

Sub-control: lianja_ui_tree::item

Property Selectors

Selectors may be based on the value of a 'custom attribute' or user-added property.

For example, a Form Section Field has a custom attribute defined:

Custom attributes: attr1=16

The 'Custom attributes' can be found at the bottom of the Data section in the Attributes dialog or App Inspector Attributes tab.

The CSS file has the following entry which will be applied to the Field:

[user_attr1="16"] {
	color:blue; 
}

Note that the custom attribute is 'attr1' and that it is referred to in the CSS selector as 'user_attr1'. Also, that the value should be in quotes - here "16".

Custom attributes should also have the 'user_' prefix specified when accessed using Lianja.get(), i.e.

Lianja.get("page1.section1.field1").user_attr1

The same Property Selector above will also be applied to a Checkbox Gadget where the property and its value have been set using the addProperty() method.

oCheck = Lianja.get("page1.section1.field10")
oCheck.addproperty("user_attr1","16")

Note that here the property is 'user_attr1', matching the name in the CSS selector.

UI State Selectors

UI State Selectors are special built-in Property Selectors for Canvas Section editable Advanced Controls.

Select based on whether the Mandatory attribute is true or false:

[lianja_uistate_mandatory="true"]

[lianja_uistate_mandatory="false"]

Select based on whether Validation returned true or false:

[lianja_uistate_valid="true"]

[lianja_uistate_valid="false"]

Pseudo-State Selectors

Selectors may contain pseudo-states. They are prefixed with a colon (:).

hover

lianja_ui_grid::item:!hover { 
	background:pink;
}
lianja_ui_grid::item:hover { 
	background:yellow;
}

CSS

Contents

See Also