Elementor\Widget_Image_Gallery::_register_controls PHP Method

    protected function _register_controls()
    {
        $this->start_controls_section('section_gallery', ['label' => __('Image Gallery', 'elementor')]);
        $this->add_control('wp_gallery', ['label' => __('Add Images', 'elementor'), 'type' => Controls_Manager::GALLERY]);
        $this->add_group_control(Group_Control_Image_Size::get_type(), ['name' => 'thumbnail', 'exclude' => ['custom']]);
        $gallery_columns = range(1, 10);
        $gallery_columns = array_combine($gallery_columns, $gallery_columns);
        $this->add_control('gallery_columns', ['label' => __('Columns', 'elementor'), 'type' => Controls_Manager::SELECT, 'default' => 4, 'options' => $gallery_columns]);
        $this->add_control('gallery_link', ['label' => __('Link to', 'elementor'), 'type' => Controls_Manager::SELECT, 'default' => 'file', 'options' => ['file' => __('Media File', 'elementor'), 'attachment' => __('Attachment Page', 'elementor'), 'none' => __('None', 'elementor')]]);
        $this->add_control('gallery_rand', ['label' => __('Ordering', 'elementor'), 'type' => Controls_Manager::SELECT, 'options' => ['' => __('Default', 'elementor'), 'rand' => __('Random', 'elementor')], 'default' => '']);
        $this->add_control('view', ['label' => __('View', 'elementor'), 'type' => Controls_Manager::HIDDEN, 'default' => 'traditional']);
        $this->end_controls_section();
        $this->start_controls_section('section_gallery_images', ['label' => __('Images', 'elementor'), 'tab' => Controls_Manager::TAB_STYLE]);
        $this->add_control('image_spacing', ['label' => __('Spacing', 'elementor'), 'type' => Controls_Manager::SELECT, 'options' => ['' => __('Default', 'elementor'), 'custom' => __('Custom', 'elementor')], 'prefix_class' => 'gallery-spacing-', 'default' => '']);
        $columns_margin = is_rtl() ? '0 0 -{{SIZE}}{{UNIT}} -{{SIZE}}{{UNIT}};' : '0 -{{SIZE}}{{UNIT}} -{{SIZE}}{{UNIT}} 0;';
        $columns_padding = is_rtl() ? '0 0 {{SIZE}}{{UNIT}} {{SIZE}}{{UNIT}};' : '0 {{SIZE}}{{UNIT}} {{SIZE}}{{UNIT}} 0;';
        $this->add_control('image_spacing_custom', ['label' => __('Image Spacing', 'elementor'), 'type' => Controls_Manager::SLIDER, 'show_label' => false, 'range' => ['px' => ['max' => 100]], 'default' => ['size' => 15], 'selectors' => ['{{WRAPPER}} .gallery-item' => 'padding:' . $columns_padding, '{{WRAPPER}} .gallery' => 'margin: ' . $columns_margin], 'condition' => ['image_spacing' => 'custom']]);
        $this->add_group_control(Group_Control_Border::get_type(), ['name' => 'image_border', 'label' => __('Image Border', 'elementor'), 'selector' => '{{WRAPPER}} .gallery-item img']);
        $this->add_control('image_border_radius', ['label' => __('Border Radius', 'elementor'), 'type' => Controls_Manager::DIMENSIONS, 'size_units' => ['px', '%'], 'selectors' => ['{{WRAPPER}} .gallery-item img' => 'border-radius: {{TOP}}{{UNIT}} {{RIGHT}}{{UNIT}} {{BOTTOM}}{{UNIT}} {{LEFT}}{{UNIT}};']]);
        $this->end_controls_section();
        $this->start_controls_section('section_caption', ['label' => __('Caption', 'elementor'), 'tab' => Controls_Manager::TAB_STYLE]);
        $this->add_control('gallery_display_caption', ['label' => __('Display', 'elementor'), 'type' => Controls_Manager::SELECT, 'default' => '', 'options' => ['' => __('Show', 'elementor'), 'none' => __('Hide', 'elementor')], 'selectors' => ['{{WRAPPER}} .gallery-item .gallery-caption' => 'display: {{VALUE}};']]);
        $this->add_control('align', ['label' => __('Alignment', 'elementor'), 'type' => Controls_Manager::CHOOSE, 'options' => ['left' => ['title' => __('Left', 'elementor'), 'icon' => 'align-left'], 'center' => ['title' => __('Center', 'elementor'), 'icon' => 'align-center'], 'right' => ['title' => __('Right', 'elementor'), 'icon' => 'align-right'], 'justify' => ['title' => __('Justified', 'elementor'), 'icon' => 'align-justify']], 'default' => 'center', 'selectors' => ['{{WRAPPER}} .gallery-item .gallery-caption' => 'text-align: {{VALUE}};'], 'condition' => ['gallery_display_caption' => '']]);
        $this->add_control('text_color', ['label' => __('Text Color', 'elementor'), 'type' => Controls_Manager::COLOR, 'default' => '', 'selectors' => ['{{WRAPPER}} .gallery-item .gallery-caption' => 'color: {{VALUE}};'], 'condition' => ['gallery_display_caption' => '']]);
        $this->add_group_control(Group_Control_Typography::get_type(), ['name' => 'typography', 'label' => __('Typography', 'elementor'), 'scheme' => Scheme_Typography::TYPOGRAPHY_4, 'selector' => '{{WRAPPER}} .gallery-item .gallery-caption', 'condition' => ['gallery_display_caption' => '']]);
        $this->end_controls_section();
    }