pwix:modal

What is it ?

A Bootstrap-based Meteor package which provides draggable and resizable modal dialogs.

Installation

As simple as:

    meteor add pwix:modal

Usage

Just call

    Modal.run( parms )

and you're done!

Without any parameters, the displayed modal will have a header with a dismiss button but no title, an empty body, and a footer with a single OK button.

See below for the available parameters.

Opening several modals

Though the Bootstrap documentation prevents against it, this package let you open more than only one modal at a time. Each is stacked on top of the previous one, and take the focus while it is active and no modal is opened on top of it.

Configuring

The package's behavior can be configured through a call to the Modal.configure() method, with just a single javascript object argument, which itself should only contains the options you want override.

Known configuration options are:

verbosity

The verbosity level as:
- Modal.C.Verbose.NONE
or an OR-ed value of integer constants:
- Modal.C.Verbose.CONFIGURE
  
  Trace configuration operations
- Modal.C.Verbose.FOCUS
  
  Trace the focus() function
- Modal.C.Verbose.NOMODAL
  
  Trace the modal research when there is none
- Modal.C.Verbose.RESIZING
  
  Trace resizing informations
- Modal.C.Verbose.STACK
  
  Trace push into and pop from stack
Defaults to Modal.C.Verbose.NONE.

Remind too that Meteor packages are instanciated at application level. They are so only configurable once, or, in other words, only one instance has to be or can be configured. Addtionnal calls to Modal.configure() will just override the previous one. You have been warned: only the application should configure a package.

What does it provide ?

`Modal`

The globally exported object.

Methods

Modal.run({ parms })

Creates and shows a modal dialog with parms parameters object. Known parameters are:
- mdAutoFocus
  
  Whether we should try to initialize the focus ourselves,or let the application manage it.
  
  When true, we try to set the focus on the first inputable field of the body, or the last button of the footer.
  
  Though this default aims to make the package easier to use, the application should be conscious that it also prevents the application to put the focus itself.
  
  Defaults to true.
- mdBeforeClose
  
  A function to be called when the user asks for close the modal, by clicking on the backdrop, or the close button of the header, or a close button in the footer. This function let the application allows or forbid the close:
  - the function takes a unique argument, which is the modal identifier
  - if the function returns true, the modal will be closed
  - if the function returns false, the modal will not.
  The default is to leave the modal be closed when the user asks for that.
- mdBody
  
  The name of a Blaze template to be rendered as the dialog body.
  
  No default.
- mdButtons
  
  The buttons to be displayed in the standard footer, as a string, an object or an array of strings or objects.
  
  Only considered if a specific footer is not asked (see mdFooter parm).
  
  Default is to have one OK button.
  
  When provided as an array, the buttons are displayed from left to right.
  
  See also Buttons management for the syntax of this data.
- mdClasses
  
  A string which contains the classes to be added to the '.modal' element.
  
  No default.
- mdClassesBody
  
  A string which contains the classes to be added to the '.modal-body' element.
  
  No default.
- mdClassesContent
  
  A string which contains the classes to be added to the '.modal-content' element.
  
  No default.
- mdClassesFooter
  
  A string which contains the classes to be added to the '.modal-footer' element.
  
  No default.
- mdClassesHeader
  
  A string which contains the classes to be added to the '.modal-header' element.
  
  No default.
- mdCloseByBackdrop
  
  Whether clicking outside of the dialog should close it.
  
  Defaults to true.
- mdCloseByHeader
  
  Whether the header holds a Close button.
  
  Defaults to true.
- mdCloseByKeyboard
  
  Whether Escape key closes the modal.
  
  Defaults to true.
- mdFooter
  
  The name of a Blaze template to be rendered as the dialog footer.
  
  Default is to render a standard footer with at least one OK button.
  
  If both are specified, mdFooter takes precedence on mdButtons.
- mdFullScreen
  
  Whether the modal should be displayed in full screen mode.
  
  This is nonetheless a rather bad idea in XS and S devices where the pagination should rather be reviewed.
  
  And also a bad idea on larger displays, as this lead to very too big dialogs.
  
  Reserve this use to dedicated less-than-MD devices.
- mdSizeKey
  
  The string name of the localStorage item which will record the last used width and height.
  
  No default.
  
  Using this feature requires the user has accepted the use of functional cookies. The size will be stored as a localStorage item.
- mdTarget
  
  The target of the events as a jQuery object.
  
  Default is let bubble the events.
  
  Note that at the time of the modal creation, you are not yet able to set the rendered template as the events target (as it has not yet been rendered). See also Modal.target().
  
  Note also that the modal will be attached to the body of the page. Events will so bubble directly from the modal to the body.
- mdTitle
  
  The title of the dialog.
  
  No default.
This method returns a string which is the unique identifier of the new modal.
Modal.buttonFind( button_id [, id ] )

Returns the specfied button as a jQuery object for the specified opened modal, defaulting to the topmost one.

Because this method makes a search on the data-md-btn-id attribute, it may be irrelevant when a specific footer has been defined.
Modal.close()

Close the current modal dialog from the caller.

Of course, and if this has not been prevented in the modal configuration, it is still possible to close the modal dialog via the usual ways:
- from the dismiss button in the header
- from the Close (resp. Cancel) button in the footer,
- or by clicking anywhere outside of the modal.
Modal.count()

Returns the count of opened modals.
Modal.focus( arg )

Set the focus on a field.

arg is a parameter object which may contain:
- id: the modal identifier, defaulting to the topmost one
- field: the targeted field as a jQuery object, defaulting to the first inputable or the last button.
The application may have its own opinion about which is the first inputable field, or, in other words, which field should be the default when the user presses a key. It will most probably to set the focus from its own onRendered() function. But this later is triggered before ours. So, because we are executed last, we cannot provide any suitable default.

As a consequence, each client application shoud call this function itself if it wants the user has any suitable default.
Modal.set( arg )

A generic method to configure a running modal.

arg must be a Javascript object with following keys:
- id: the identifier of the to-be-configured modal, defaulting to the current topmost
- autoFocus: when specified, whether the focus is automatically managed by the modal itself.
  
  See the mdAutoFocus parameter to get a full description.
- beforeClose: when specified, the function to be called by the modal to get an authorization to close.
  
  See the mdBeforeClose parameter to get a description of the function.
- body: when specified, the name of the Blaze template to be set as the modal body
- buttons: when specified, an object or an array of object, each object providing the properties to be set on a button, as:
  - id: mandatory
  - label
  - classes
  - enabled
  - name
  - type
  - html
  - cb
  - dismiss
  If a button has not been previously defined, then it is added at the end of the list.
- classes: when specified, classes to be added to the '.modal' element
- classesBody: when specified, classes to be added to the '.modal-body' element
- classesContent: when specified, classes to be added to the '.modal-content' element
- classesFooter: when specified, classes to be added to the '.modal-footer' element
- classesHeader: when specified, classes to be added to the '.modal-header' element
- closeByBackdrop: when specified, whether the dialog should be closed when clicking on the backdrop
- closeByHeader: when specified, whether the header exhibits a dismiss button
- closeByKeyboard: when specified, whether the dialog should be closed when hitting Escape
- footer: when specified, the name of the Blaze template to be set as the modal footer
  
  Just set to null to pass from a specific footer to the standard one.
  
  Specifying a particular footer takes precedence over the standard one.
  
  When a particular footer is specified, then the button methods are no more operationnal, and you have to manage them yourself.
- fullscreen: when specified, whether the dialog should be displayed in full screen mode
- target: when specified, the JQuery object which must receive events for that modal
  
  This method is usually called from the rendered body template onRendered() function. At that time, not only the DOM is rendered for this element, but it is very probable that this is in this template that the triggered events will be useful.
- title: when specified, the title of the modal
Modal.target()

Returns the current modal events target.

Buttons management

When using the standard footer, buttons can be specified either as a string, an array of string, an object or an array of objects.

An accepted string must be one of the button identifiers as defined by the constants.

An accepted object is a full object definition, with keys:

id: the button identifier as a string, mandatory

It may be one of our known button identifiers, or an identifier provided by the caller.
label: the label of the button

If the button identifier is one of ours, then label defaults to the standard (localized) label associated with this button.

If the button identifier is provided by the caller, then label defaults to the identifier itself.
classes: the classes to be set for the button

Defaults to:
- btn-secondary for all but the last buttons
- btn-primary for the last (the rightest) button.
enabled: whether the button defaults to be enabled.

Defaults to true.
name: the name of the button

Defaults to button identifier.
type: the type of the button

Accepted values are:
- submit
- reset
- button
Defaults to button.

Please also note that a type="submit" button will reload the page when activated. This is probably not what you want in a Meteor application.
html: the full button definition <button>...</button> as a HTML string

No default.

If this attribute is set, it takes precedence other label, classes, enabled, name and type.
cb: a function (modal_id, button_id) to be called when the button is clicked

The return value of the function is ignored.
dismiss: a boolean value which says whether clicking on the button should dismiss the modal

Defaults to true if there is one single button, to false else.

All others parameters passed when creating the button are kept, and made available in button.parms data passed with md-click event.

Each button, apart those generated directly via the html key, has a date-md-btn-id attribute set to the button identifier.

Please note that all that buttons management is NOT relevant when using a specific footer.

Translations

Modal.i18n.namespace()

Returns the i18n namespace of the package.

Constants

Buttons

Modal.C.Button.OK
Modal.C.Button.CANCEL
Modal.C.Button.CLOSE
Modal.C.Button.SAVE
Modal.C.Button.YES
Modal.C.Button.NO

These are our known, standard, button identifiers. Their labels are localizable.

Events

md-click

A button has been clicked.

The event holds a data object with:
- id: the modal identifier
- button: the button properties with:
  - id: the button identifier (always set)
  - parms: the parameters initially passed when creating the button
- parms: the parameters initialy passed to Modal.run().
If the button holds a truthy dismiss property, or is the only button of the standard footer, then the dialog is closed. In other cases, it is the responsability of the event receiver to close the modal.
md-close

An event sent when the modal is about to close, whatever be the reason.

The event holds a data object with:
- id: the modal identifier
- parms: the parameters initialy passed to Modal.run().
Note that this event is only for information. It does not let the receiver to prevent the modal closing. In order to do that, see the mdBeforeClose parameter.
md-ready

The modal has been rendered, the DOM is ready.

The event holds a data object with:
- id: the modal identifier
- parms: the parameters initialy passed to Modal.run().

Example

Say you have a template you want render in a modal:

    <template name="my_panel">
        <div class="my-panel">

            <form>
                <label for="" class="form-label form-label-sm frs-one">{{ i18n label="title_label" }}</label>
                <input type="text" class="form-control form-control-sm frs-title" placeholder="{{ i18n label="title_placeholder" }}" value="{{ catTitle }}" />

                <label for="" class="form-label form-label-sm frs-one">{{ i18n label="description_label" }}</label>
                <textarea class="form-control form-control-sm frs-description" placeholder="{{ i18n label="description_placeholder" }}" rows="3">{{ catDescription }}</textarea>
            </form>

        </div>
    </template>

From the parent who mades the open decision, just run:

    Modal.run({
        mdBody: 'my_panel',
        mdTitle: 'A simple form',
        mdButtons: [ Modal.C.Button.CANCEL, Modal.C.Button.SAVE ]
    });

In the template JS:

    Template.my_panel.onRendered( function(){
        Modal.setTarget( this.$( '.my-panel' ));
    });

    ...

    Template.my_panel.events({
        'md-click .my-panel'( event, instance, data ){
            if( data.button === Modal.C.Button.SAVE ){
                // do something
                Modal.close();
            }
        }
    });

pwix:modal attaches its modals to the document body.

If you do not set a target, the events will eventually bubble until the body DOM element.

NPM peer dependencies

Starting with v 1.0.0, and in accordance with advices from the Meteor Guide, we no more hardcode NPM dependencies in the Npm.depends clause of the package.js.

Instead we check npm versions of installed packages at runtime, on server startup, in development environment.

Dependencies as of v 1.8.0:

    '@popperjs/core': '^2.11.6',
    'bootstrap': '^5.2.1',
    'lodash': '^4.17.0'

Each of these dependencies should be installed at application level:

    meteor npm install <package> --save

Translations

New and updated translations are willingly accepted, and more than welcome. Just be kind enough to submit a PR on the Github repository.

Cookies and comparable technologies

pwix:modal may use localStorage to record the size of a dialog through the mdSizeKey argument of the Modal.run() method.

Because this is dynamically done on a per dialog basis, and only on the caller request, the package cannot advertize of this use, relying on the caller own declaration.

P. Wieser

Last updated on 2023, Sep. 18th

pwix:modal

pwix:modal

What is it ?

Installation

Usage

Opening several modals

Configuring

What does it provide ?

Modal

Methods

The life of the modal

Buttons management

Translations

Constants

Buttons

Events

Example

Modal attachment in the DOM

NPM peer dependencies

Translations

Cookies and comparable technologies

`Modal`