added scroll bar ui

[fishladder.git] / vg / vg_ui.h

diff --git a/vg/vg_ui.h b/vg/vg_ui.h
index a2cc77057af0da407c4681fe83333acdbd3a5570..35a3e3b8df9294a8ab30aac94f4d2d41a33bbb72 100644 (file)
--- a/vg/vg_ui.h
+++ b/vg/vg_ui.h
@@ -98,6 +98,35 @@ struct ui_ctx
        int click_state;        // 0: released, 1: on down, 2: pressed, 3: on release
 };
 
+// Shortnames
+#define gui_draw(...) ui_draw( &ui_global_ctx, __VA_ARGS__)
+#define gui_current(...) ui_current( &ui_global_ctx, __VA_ARGS__)
+#define gui_new_node() ui_new_node( &ui_global_ctx )
+#define gui_hasmouse(...) ui_hasmouse( &ui_global_ctx, __VA_ARGS__)
+#define gui_end() ui_end( &ui_global_ctx )
+#define gui_end_down() ui_end_down( &ui_global_ctx )
+#define gui_end_right() ui_fill_right( &ui_global_ctx )
+#define gui_fill_y() ui_fill_y( &ui_global_ctx)
+#define gui_fill_x() ui_fill_x( &ui_global_ctx)
+#define gui_align_bottom() ui_align_bottom( &ui_global_ctx )
+#define gui_align_right() ui_align_right( &ui_global_ctx )
+#define gui_align_top() ui_align_top( &ui_global_ctx )
+#define gui_align_left() ui_align_left( &ui_global_ctx )
+#define gui_clamp_rect(...) ui_clamp_rect( &ui_global_ctx, __VA_ARGS__)
+#define gui_group_id(...) ui_group_id( &ui_global_ctx, __VA_ARGS__)
+#define gui_capture_mouse(...) ui_capture_mouse( &ui_global_ctx, __VA_ARGS__)
+#define gui_set_clip(...) ui_set_clip( &ui_global_ctx, __VA_ARGS__)
+#define gui_release_clip() ui_release_clip( &ui_global_ctx )
+#define gui_fill_rect_uv(...) ui_fill_rect_uv( &ui_global_ctx, __VA_ARGS__)
+#define gui_fill_rect(...) ui_fill_rect( &ui_global_ctx, __VA_ARGS__)
+#define gui_text(...) ui_text( &ui_global_ctx, __VA_ARGS__)
+#define gui_begin(...) ui_begin( &ui_global_ctx, __VA_ARGS__)
+#define gui_resolve(...) ui_resolve( &ui_global_ctx, __VA_ARGS__)
+#define gui_set_mouse(...) ui_set_mouse( &ui_global_ctx, __VA_ARGS__)
+#define gui_button(...) ui_button( &ui_global_ctx, __VA_ARGS__)
+#define gui_window(...) ui_window( &ui_global_ctx, __VA_ARGS__)
+#define gui_want_mouse() ui_want_mouse( &ui_global_ctx )
+
 // Globals
 // ===========================================================================================================
 
@@ -420,6 +449,11 @@ static void ui_capture_mouse( ui_ctx *ctx, u32 id )
        }
 }
 
+static int ui_want_mouse( ui_ctx *ctx )
+{
+       return ctx->capture_mouse_id == 0? 0: 1;
+}
+
 static void ui_set_clip( ui_ctx *ctx, ui_rect clip )
 {
        ctx->clipping[0] = clip[0];
@@ -589,6 +623,9 @@ static void ui_begin( ui_ctx *ctx, ui_px res_x, ui_px res_y )
        ctx->num_indices = 0;
        
        ui_release_clip( ctx );
+       
+       if( ctx->click_state == 0 )
+               ctx->capture_mouse_id = 0;
 }
 
 static void ui_resolve( ui_ctx *ctx )
@@ -625,6 +662,14 @@ struct ui_window
        ui_px drag_offset[2];
 };
 
+enum button_state
+{
+       k_button_released = 0,
+       k_button_start_click,
+       k_button_click,
+       k_button_hold
+};
+
 static int ui_button( ui_ctx *ctx, u32 id )
 {
        ui_new_node( ctx );
@@ -634,19 +679,22 @@ static int ui_button( ui_ctx *ctx, u32 id )
                if( ui_hasmouse(ctx) )
                {
                        ui_fill_rect( ctx, ctx->cursor, 0xffcccccc );
-               
+                       
                        if( ctx->click_state == 1 )
-                               ctx->capture_lock = 1;
-                       else if( ctx->capture_lock && ctx->click_state == 3 )
                        {
-                               return 1;
+                               ctx->capture_lock = 1;
+                               return k_button_start_click;
                        }
+                       else if( ctx->capture_lock && ctx->click_state == 3 )
+                               return k_button_click;
+                       else if( ctx->capture_lock && ctx->click_state == 2 )
+                               return k_button_hold;
                }
                else
                        ui_fill_rect( ctx, ctx->cursor, 0xff999999 );
        }
        
-       return 0;
+       return k_button_released;
 }
 
 static int ui_window( ui_ctx *ctx, struct ui_window *window, u32 control_group )
@@ -721,3 +769,68 @@ static int ui_window( ui_ctx *ctx, struct ui_window *window, u32 control_group )
        
        return 1;
 }
+
+struct ui_scrollbar
+{
+       int     drag;
+       ui_px drag_offset;
+       
+       ui_px py;
+       ui_px bar_height;
+       ui_px view_height;
+};
+
+static void ui_scrollbar( ui_ctx *ctx, struct ui_scrollbar *scrollbar, u32 id )
+{
+       scrollbar->view_height = ctx->cursor[3];
+
+       if( scrollbar->drag )
+       {
+               scrollbar->py = ctx->mouse[1]+scrollbar->drag_offset;
+               scrollbar->py = VG_MAX( scrollbar->py, 0 );
+               scrollbar->py = VG_MIN( scrollbar->py, ctx->cursor[3] - scrollbar->bar_height );
+               
+               if( ctx->click_state == 0 || ctx->click_state == 3 )
+                       scrollbar->drag = 0;
+       }
+       
+       ui_new_node( ctx );
+       {
+               ui_fill_rect( ctx, ctx->cursor, 0xff000000 );
+               ui_capture_mouse( ctx, __COUNTER__ );
+               
+               ctx->cursor[1] += scrollbar->py;
+               ctx->cursor[3] = scrollbar->bar_height;
+               
+               ui_new_node( ctx );
+               {
+                       ui_capture_mouse( ctx, __COUNTER__ );
+                       struct ui_vert *drag_bar = ui_fill_rect( ctx, ctx->cursor, 0xff555555 );
+
+                       if( ui_hasmouse( ctx ) || scrollbar->drag )
+                       {
+                               drag_bar[0].colour = 0xff777777;
+                               drag_bar[1].colour = 0xff777777;
+                               drag_bar[2].colour = 0xff777777;
+                               drag_bar[3].colour = 0xff777777;
+                       
+                               // start drag
+                               if( ctx->click_state == 1 )
+                               {
+                                       scrollbar->drag = 1;
+                                       scrollbar->drag_offset = scrollbar->py - ctx->mouse[1];
+                               }
+                       }
+               }
+               ui_end_down( ctx );
+       }
+       ui_end( ctx );
+}
+
+static ui_px ui_calculate_content_scroll( struct ui_scrollbar *scrollbar, ui_px content )
+{
+       float overlap = vg_maxf( 0.0f, (float)(content - scrollbar->view_height) );
+       
+       float range = scrollbar->view_height - scrollbar->bar_height;
+       return ((float)scrollbar->py / range) * overlap;
+}