function ModalPicker() {

    var self = this;

    this.cover = Titanium.UI.createWindow({
        backgroundColor: "#fff",
        opacity: 0.3,
        fullscreen: true,
        height: Titanium.Platform.displayCaps.platformHeight,
        bottom: 0,
        zIndex: 1000
    });

    this.picker_view = Titanium.UI.createView({
        height: 251,
        bottom: -251,
        zIndex: 1010
    });

    this.cancel = Titanium.UI.createButton({
        title: 'Cancel',
        /* TODO: Fix this */
        style: Titanium.UI.iPhone.SystemButtonStyle.BORDERED,
        zIndex: 1020
    });

    this.done = Titanium.UI.createButton({
        title: 'Done',
        /* TODO: Fix this */
        style: Titanium.UI.iPhone.SystemButtonStyle.DONE,
        zIndex: 1020
    });

    this.spacer = Titanium.UI.createButton({
        /* TODO: Fix this */
        systemButton: Titanium.UI.iPhone.SystemButton.FLEXIBLE_SPACE,
        zIndex: 1020
    });

    this.picker = Ti.UI.createPicker({
        top: 43
    });

    this.slide_in = Titanium.UI.createAnimation({
        bottom: 0
    });

    this.slide_out = Titanium.UI.createAnimation({
        bottom: -251
    });

    this.init = function () {

        tt.ui.View.add(self.cover);
        self.cover.hide();
        self.picker.selectionIndicator = true;
        self.picker_view.add(self.picker);

        self.toolbar = Titanium.UI.createToolbar({
            top: 0,
            items: [self.cancel, self.spacer, self.done]
        });

        self.picker_view.add(self.toolbar);

        self.cancel.addEventListener('click', function (e) {
            self.cover.hide();
            self.picker_view.animate(self.slide_out);
        });

        tt.ui.View.add(self.picker_view);

    }

    this.show = function (params) {

        self.picker.columns = [];
        self.picker.add(params.data);

        if (self.done.lastEventListener) {
            self.done.removeEventListener('click', self.done.lastEventListener);
        }

        self.done.lastEventListener = params.on_select;
        self.done.addEventListener('click', params.on_select);

        self.cover.show();
        self.picker_view.animate(self.slide_in);

    }

    this.hide = function () {
        self.cover.hide();
        self.picker_view.animate(self.slide_out);
    }

}