Ext.ux.grid.Editor é uma extensão da classe Ext.grid.EditorGridPanel, do framework ExtJS que oferece ao usuário um grid (tabela) com paginação e ordenação de colunas, adição, exclusão e modificação de registros.

As operações CRUD (Create, Read, Update, Delete) podem ser realizadas através da edição direta nas linhas do grid ou através de formulário (bastando passar a configuração editForm para ativar os formulários).

Este é uma user extension para quem conhece um pouco de ExtJS. Embora esteja em estágio Alfa, pode tranquilamente ser utilizada.

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Ext.ns('Ext.ux.grid');
Ext.ux.grid.Editor = Ext.extend(Ext.grid.EditorGridPanel, {
    autoHeight: true
    ,border: false
    ,sm: new Ext.grid.CellSelectionModel({
        singleSelect:true
    })
    ,loadMask: new Ext.LoadMask(Ext.getBody(),{
        msg: 'Lendo dados no servidor ...'
        ,removeMask: true
    })
    ,stripeRows: true
    ,maskDisabled: true
    ,initComponent: function(){
        this.viewConfig = {
            forceFit: true
            ,emptyText: 'Sem registros para exibir!'
        };

        this.store.autoDestroy = true;
        this.store.autoLoad = true;
        this.store.autoSave = false;
        this.store.remoteSort = false;
        this.store.writer = new Ext.data.JsonWriter({
            encode: true
            ,writeAllFields: true
        });
        this.store.reader = new Ext.data.JsonReader({
            successProperty: 'success'
            ,messageProperty: 'message'
            ,totalProperty: 'total'
        });
        this.store.baseParams = {
            start: 0
            ,limit: Ext.PAGESIZE
        };


        this.store.waitMsg = 'Salvando registro ...';
        this.store.waitTitle = 'Aguarde ...';

        this.store = new Ext.data.JsonStore(this.store);

        this.tbar = new Ext.Toolbar({
            items: [{
                    text: 'Novo'
                    ,iconCls: 'x-icon-add'
                    ,handler: this.onAdd
                    ,scope: this
            },{
                    text: 'Salvar'
                    ,id: 'btn-save'
                    ,iconCls: 'x-icon-save'
                    ,disabled: true
                    ,handler: this.onSave
                    ,scope: this
            },{
                    text: 'Editar'
                    ,id: 'btn-edit'
                    ,iconCls: 'x-icon-edit'
                    ,handler: this.onEdit
                    ,scope: this
                    ,disabled: true
            },{
                    text: 'Apagar'
                    ,id: 'btn-delete'
                    ,iconCls: 'x-icon-delete'
                    ,handler: this.onDestroy
                    ,scope: this
                    ,disabled: true
            },{
                    text: 'Cancelar'
                    ,id: 'btn-cancel'
                    ,iconCls: 'x-icon-cancel'
                    ,handler: this.onCancel
                    ,scope: this
                    ,disabled: true
            }]
        });
        this.bbar = new Ext.PagingToolbar({
            pageSize: Ext.PAGESIZE
            ,store: this.store
            ,displayInfo: true
            ,afterPageText: 'de {0}'
            ,beforePageText: 'Página'
            ,firstText: 'Primeira página'
            ,lastText: 'Última página'
            ,nextText: 'Próxima página'
            ,prevText: 'Página anterior'
            ,refreshText: 'Atualizar'
            ,displayMsg: 'Mostrando registros {0} a {1} do total de {2}'
            ,emptyMsg: 'Sem registros para exibir'
        });

        Ext.ux.grid.Editor.superclass.initComponent.call(this);

        Ext.TITLEDEFAULT = this.title;
        Ext.ICONCLSDEFAULT = this.iconCls;

        this.success = true;
        this.error = new Array();

        this.addListener('rowdblclick', function(){
            this.onEdit();
        }, this);

        this.addListener('cellclick', function(){
            this.enableBtnEdit();
            this.enableBtnDelete();
        }, this);

        this.store.addListener('save', function(str){
            this.setTitle(Ext.TITLEDEFAULT);
            this.setIconClass(Ext.ICONCLSDEFAULT);

            if(this.success === false){
                Ext.Msg.show({
                    title: 'Erro ao salvar'
                    ,msg: this.error
                    ,buttons: Ext.Msg.OK
                    ,icon: Ext.Msg.ERROR
                });
            }else{
                Ext.Msg.show({
                    title: 'Sucesso ao salvar'
                    ,msg: 'Registros salvos com sucesso!'
                    ,buttons: Ext.Msg.OK
                    ,icon: Ext.Msg.INFO
                });
                this.store.reload();
            }
        }, this);

        this.store.addListener('exception', function(proxy, type, action, options, response, arg){
            if(type == 'remote'){
                if(response.raw.read === true){
                    Ext.Msg.show({
                        title: 'Erro ao ler dados'
                        ,msg: response.raw.message
                        ,buttons: Ext.Msg.OK
                        ,icon: Ext.Msg.ERROR
                    });
                }else{
                    this.error += response.raw.message;
                    this.success = false;
                }

            }else if(type == 'response'){
                var res = Ext.util.JSON.decode(response.responseText);

                if(res.read === true){
                    Ext.Msg.show({
                        title: 'Erro ao ler dados'
                        ,msg: res.message
                        ,buttons: Ext.Msg.OK
                        ,icon: Ext.Msg.ERROR
                    });
                }else{
                    if(res.success === false){
                        this.error += res.message;
                        this.success = false;
                    }
                }
            }
        }, this);

        this.store.addListener('write', function(proxy, action, data, response, record, options){
            if(response.raw.success === false){
                this.error += response.raw.message;
                this.success = false;
            }
        }, this);

    }
    ,showError: function(){
        
    }
    ,onAdd: function(btn, ev){
        if(this.editForm){
            this.createInForm();
        }else{
            this.createInLine();
        }
    }
    ,createInLine: function(){
        this.setTitle(Ext.TITLEDEFAULT + ' [MODIFICADO]');
        this.setIconClass('x-icon-edit');
        var u = new this.store.recordType();
        this.stopEditing();
        this.store.insert(0, u);
        this.startEditing(0,1);
        this.enableBtnSave();
        this.enableBtnCancel();
    }
    ,createInForm: function(){
        this.setTitle(Ext.TITLEDEFAULT + ' [MODIFICADO]');
        this.setIconClass('x-icon-edit');
        this.disable();
        this.stopEditing();
        var form = this.createForm(this.editForm, 'create');
        
        var win = new Ext.Window({
            title: 'Adição de registro'
            ,iconCls: 'x-icon-add'
        });
        win.add(form);
        win.show();

        win.addListener('beforeclose', function(panel){
            this.store.reload();
            this.enable();
        }, this);
    }
    ,onEdit: function(btn, ev){
        if(this.getSelectionModel().hasSelection()){
            if(this.editForm){
                this.editInForm(this);
            }else{
                this.editInLine(this);
            }
        }else{
            Ext.Msg.show({
                title: 'Erro na edição'
                ,msg: 'Não há nenhum registro selecionado!'
                ,buttons: Ext.Msg.OK
                ,icon: Ext.MessageBox.ERROR
            });
        }
    }
    ,onSave: function(btn, ev){
        this.disableBtnSave();
        this.disableBtnEdit();
        this.disableBtnDelete();
        this.disableBtnCancel();
        this.store.save();
    }
    ,onDestroy: function(){
        var index = this.getSelectionModel().getSelectedCell();
        if(!index){
            Ext.Msg.show({
                title: 'Erro na exclusão'
                ,msg: 'Não há nenhum registro selecionado!'
                ,buttons: Ext.Msg.OK
                ,icon: Ext.MessageBox.ERROR
            });
        }else{
            this.enableBtnSave();
            this.enableBtnCancel();
            var rec = this.store.getAt(index[0]);
            this.store.remove(rec);
        }
    }
    ,onCancel: function(btn, ev){
        this.setTitle(Ext.TITLEDEFAULT);
        this.setIconClass(Ext.ICONCLSDEFAULT);
        this.store.rejectChanges();
        this.disableBtnSave();
        this.disableBtnEdit();
        this.disableBtnDelete();
        this.disableBtnCancel();
    }
    ,enableBtnSave: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-save');
        btn.setDisabled(false);
    }
    ,disableBtnSave: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-save');
        btn.setDisabled(true);
    }
    ,enableBtnEdit: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-edit');
        btn.setDisabled(false);
    }
    ,disableBtnEdit: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-edit');
        btn.setDisabled(true);
    }
    ,enableBtnDelete: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-delete');
        btn.setDisabled(false);
    }
    ,disableBtnDelete: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-delete');
        btn.setDisabled(true);
    }
    ,enableBtnCancel: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-cancel');
        btn.setDisabled(false);
    }
    ,disableBtnCancel: function(){
        var tbar = this.getTopToolbar();
        var btn = tbar.get('btn-cancel');
        btn.setDisabled(true);
    }
    ,editInLine: function(){
        this.setTitle(Ext.TITLEDEFAULT + ' [MODIFICADO]');
        this.setIconClass('x-icon-edit');
        this.enableBtnSave();
        this.enableBtnEdit();
        this.enableBtnCancel();
        var rec = this.getSelectionModel().getSelectedCell();
        this.startEditing(rec[0], rec[1]);
    }
    ,editInForm: function(){
        this.setTitle(Ext.TITLEDEFAULT + ' [MODIFICADO]');
        this.setIconClass('x-icon-edit');
        this.disable();
        this.stopEditing();
        var form = this.createForm(this.editForm, 'update');
        var rec = this.getSelectionModel().getSelectedCell();
        var row = rec[0];
        var record = this.store.getAt(row);
        form.getForm().loadRecord(record);
        
        var win = new Ext.Window({
            title: 'Edição de registro'
            ,iconCls: 'x-icon-edit'
        });
        win.add(form);
        win.show();

        win.addListener('beforeclose', function(panel){
            this.store.reload();
            this.enable();
        }, this);

    }
    ,createForm: function(fields, action){
        var form = new Ext.form.FormPanel({
            border: false
            ,id: 'edit-form'
            ,bodyStyle:'padding:5px 5px 5px 5px'
            ,url: this.store.url
            ,items: fields
            ,buttons: [{
                    text: 'Salvar'
                    ,iconCls: 'x-icon-save'
                    ,handler: function(){
                        var el = Ext.ComponentMgr.get('edit-form');
                        el.getForm().submit({
                            method: 'POST'
                            ,waitMsg: 'Salvando registro ...'
                            ,waitTitle: 'Aguarde ...'
                            ,success: function(frm, act){
                                Ext.Msg.show({
                                    title: 'Registro salvo!'
                                    ,msg: act.result.message
                                    ,buttons: Ext.Msg.OK
                                    ,icon: Ext.MessageBox.INFO
                                });
                            }
                            ,failure: function(frm, act){
                                if(act.failureType === 'server'){
                                    var msg = act.result.message;
                                }else{
                                    var msg = 'Erro desconhecido!';
                                }
                                Ext.Msg.show({
                                    title: 'Erro ao salvar registro! [' + act.failureType + ']'
                                    ,msg: msg
                                    ,buttons: Ext.Msg.OK
                                    ,icon: Ext.MessageBox.ERROR
                                });
                            }
                        });
                    }
                    ,scope: this
            },{
                text: 'Desfazer'
                ,iconCls: 'x-icon-undo'
                ,handler: function(){
                    var el = Ext.ComponentMgr.get('edit-form');
                    el.getForm().reset();
                }
            },{
                text: 'Fechar'
                ,iconCls: 'x-icon-close'
                ,handler: function(){
                    this.setTitle(Ext.TITLEDEFAULT);
                    this.setIconClass(Ext.ICONCLSDEFAULT);
                    var el = Ext.ComponentMgr.get('edit-form');
                    var parent = el.getBubbleTarget();
                    parent.close();
                    this.enable();
                }
                ,scope: this
            }]
        });

        form.add({
            name: 'xaction'
            ,xtype: 'hidden'
            ,value: action
        });

        return form;
    }
});

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