krpano/tour/plugins/swipe_gallery.xml

<krpano version="1.18">

	<action name="make_gallery">
		trace(%0 %1);
		
		<!-- config -->
		set(min_movement, 50);              <!-- minimal movement in pixels needed to swipe picture -->
		set(show_arrows,  true);            <!-- show gallery arrows -->
		
		<!-- creating galery -->
		if (%1 != null,
			<!-- removing previous gallery -->
			for(copy(i, plugin.count), i GE 0, dec(i),
				if(plugin[get(i)].parent == gallery_scrollarea,
					removeplugin(get(i));
				);
			);
			
			set(activeGallery, %1);
		
			<!-- scroller's width -->
			mul(layer[gallery_scrollarea].width, stagewidth, gallery[%1].img.count);
			layer[gallery_scrollarea].setcenter(0,0);
			set(pic_id, 0);
        	

			<!-- adding images -->
			for(set(i,0), i LT gallery[%1].img.count, inc(i),
				set(iname, get(gallery[%1].img[get(i)].name));
				txtadd(cname, get(gallery[%1].img[get(i)].name), '_container');
				addlayer(get(cname));
				set(layer[get(cname)].type, container);
				set(layer[get(cname)].parent, gallery_scrollarea);
				set(layer[get(cname)].width, get(stagewidth));
				set(layer[get(cname)].height, get(stageheight));
				set(layer[get(cname)].bgcolor, 0x000000);
				set(layer[get(cname)].bgalpha, 0.0);
				set(layer[get(cname)].bgcapture, true);
				set(layer[get(cname)].align, left);
				set(layer[get(cname)].edge, center);
				mul(layer[get(cname)].x, stagewidth, i);
				div(layer[get(cname)].ox, stagewidth, 2);
				set(layer[get(cname)].id, get(i));
				set(layer[get(cname)].ondown, set(gallery_scrollarea_start_pos, get(layer[gallery_scrollarea].x)));
				set(layer[get(cname)].onup, move_image());
				
				addlayer(get(iname));
				set(layer[get(iname)].url, get(gallery[%1].img[get(i)].url));
				set(layer[get(iname)].parent, gallery_scrollarea);
				set(layer[get(iname)].align, left);
				set(layer[get(iname)].edge, center);
				mul(layer[get(iname)].x, stagewidth, i);
				div(layer[get(iname)].ox, stagewidth, 2);
				set(layer[get(iname)].enabled, false);
				set(layer[get(iname)].onloaded, if (pixelwidth GT stagewidth OR pixelheight GT stageheight, div(hscale, stagewidth, pixelwidth); div(vscale, stageheight, pixelheight); if (hscale GT vscale, copy(height, stageheight); set(width, PROP); , copy(width, stagewidth); set(height, PROP))));
			);
			,
			trace(%0: missed gallery name);
		);
		
		<!-- showing/hidding arrows -->
		if(show_arrows == true AND gallery[%1].img.count GT 1,
			set(layer[arrow_left].visible, false);
			set(layer[arrow_right].visible, true);
			,
			set(layer[arrow_left].visible, false);
			set(layer[arrow_right].visible, false);
		);
	</action>
	 	
	<action name="move_image">
		trace(%0 %1);

		sub(gallery_scrollarea_direction, gallery_scrollarea_start_pos, layer[gallery_scrollarea].x);
		
		<!-- 'moving' by arrows clicking (parames left/right) -->
		if(%1 == left, set(gallery_scrollarea_direction, -500));
		if(%1 == right, set(gallery_scrollarea_direction, 500));
		
		Math.abs(movement, gallery_scrollarea_direction);
		
		if (movement GT min_movement,
			if(gallery_scrollarea_direction LT 0,
				<!-- move right -->
				dec(pic_id);
				if(pic_id LT 0, inc(pic_id));
				,
				<!-- move left -->
				inc(pic_id);
				if(pic_id GE gallery[get(activeGallery)].img.count, dec(pic_id));
			);
			
			<!-- updating arrows status -->
			if(show_arrows == true,
				sub(last_img_id, gallery[get(activeGallery)].img.count, 1);
				if(pic_id LE 0, set(layer[arrow_left].visible, false), set(layer[arrow_left].visible, true));
				if(pic_id LT  last_img_id, set(layer[arrow_right].visible, true), set(layer[arrow_right].visible, false));
			);
		);

		mul(gallery_scrollarea_new_pos, pic_id, stagewidth);
		div(stagewidth2, stagewidth, 2);
		add(gallery_scrollarea_new_pos, stagewidth2);
		
		layer[gallery_scrollarea].scrolltocenter(get(gallery_scrollarea_new_pos),0);
		
	</action>
	
	<action name="hide_gallery">
		tween(layer[gallery].alpha, 0);
	</action>
	
	<action name="show_gallery">
		set(foo,%1);
		if(%1 != activeGallery, 
			make_gallery(%1);
		); 

		tween(layer[gallery].alpha, 1);
	</action>
	
</krpano>