[re]implement horizontal meter
[ardour.git] / libs / gtkmm2ext / fastmeter.cc
index c930e60be39e86362caf877a7bff8750b40caead..c79b120624476002d91aec03dc7c2bd57f2fdc7a 100644 (file)
@@ -44,6 +44,9 @@ bool FastMeter::no_rgba_overlay = false;
 FastMeter::Pattern10Map FastMeter::vm_pattern_cache;
 FastMeter::PatternBgMap FastMeter::vb_pattern_cache;
 
+FastMeter::Pattern10Map FastMeter::hm_pattern_cache;
+FastMeter::PatternBgMap FastMeter::hb_pattern_cache;
+
 FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o, int len,
                int clr0, int clr1, int clr2, int clr3,
                int clr4, int clr5, int clr6, int clr7,
@@ -99,10 +102,18 @@ FastMeter::FastMeter (long hold, unsigned long dimen, Orientation o, int len,
        if (!len) {
                len = 250;
        }
-       fgpattern = request_vertical_meter(dimen, len, _clr, _stp, _styleflags);
-       bgpattern = request_vertical_background (dimen, len, _bgc, false);
-       pixheight = len;
-       pixwidth = dimen;
+       if (orientation == Vertical) {
+               pixheight = len;
+               pixwidth = dimen;
+               fgpattern = request_vertical_meter(pixwidth + 2, pixheight + 2, _clr, _stp, _styleflags);
+               bgpattern = request_vertical_background (pixwidth + 2, pixheight + 2, _bgc, false);
+
+       } else {
+               pixheight = dimen;
+               pixwidth = len;
+               fgpattern = request_horizontal_meter(pixwidth + 2, pixheight + 2, _clr, _stp, _styleflags);
+               bgpattern = request_horizontal_background (pixwidth + 2, pixheight + 2, _bgc, false);
+       }
 
        pixrect.width = pixwidth;
        pixrect.height = pixheight;
@@ -119,7 +130,7 @@ FastMeter::~FastMeter ()
 
 Cairo::RefPtr<Cairo::Pattern>
 FastMeter::generate_meter_pattern (
-               int width, int height, int *clr, float *stp, int styleflags)
+               int width, int height, int *clr, float *stp, int styleflags, bool horiz)
 {
        guint8 r,g,b,a;
        double knee;
@@ -221,6 +232,24 @@ FastMeter::generate_meter_pattern (
                cairo_surface_destroy (surface);
        }
 
+       if (horiz) {
+               cairo_surface_t* surface;
+               cairo_t* tc = 0;
+               surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, height, width);
+               tc = cairo_create (surface);
+
+               cairo_matrix_t m;
+               cairo_matrix_init_rotate (&m, -M_PI/2.0);
+               cairo_matrix_translate (&m, -height, 0);
+               cairo_pattern_set_matrix (pat, &m);
+               cairo_set_source (tc, pat);
+               cairo_rectangle (tc, 0, 0, height, width);
+               cairo_fill (tc);
+               cairo_pattern_destroy (pat);
+               pat = cairo_pattern_create_for_surface (surface);
+               cairo_destroy (tc);
+               cairo_surface_destroy (surface);
+       }
        Cairo::RefPtr<Cairo::Pattern> p (new Cairo::Pattern (pat, false));
 
        return p;
@@ -229,7 +258,7 @@ FastMeter::generate_meter_pattern (
 
 Cairo::RefPtr<Cairo::Pattern>
 FastMeter::generate_meter_background (
-               int width, int height, int *clr, bool shade)
+               int width, int height, int *clr, bool shade, bool horiz)
 {
        guint8 r0,g0,b0,r1,g1,b1,a;
 
@@ -270,6 +299,25 @@ FastMeter::generate_meter_background (
                cairo_surface_destroy (surface);
        }
 
+       if (horiz) {
+               cairo_surface_t* surface;
+               cairo_t* tc = 0;
+               surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, height, width);
+               tc = cairo_create (surface);
+
+               cairo_matrix_t m;
+               cairo_matrix_init_rotate (&m, -M_PI/2.0);
+               cairo_matrix_translate (&m, -height, 0);
+               cairo_pattern_set_matrix (pat, &m);
+               cairo_set_source (tc, pat);
+               cairo_rectangle (tc, 0, 0, height, width);
+               cairo_fill (tc);
+               cairo_pattern_destroy (pat);
+               pat = cairo_pattern_create_for_surface (surface);
+               cairo_destroy (tc);
+               cairo_surface_destroy (surface);
+       }
+
        Cairo::RefPtr<Cairo::Pattern> p (new Cairo::Pattern (pat, false));
 
        return p;
@@ -279,10 +327,8 @@ Cairo::RefPtr<Cairo::Pattern>
 FastMeter::request_vertical_meter(
                int width, int height, int *clr, float *stp, int styleflags)
 {
-       if (height < min_pattern_metric_size)
-               height = min_pattern_metric_size;
-       if (height > max_pattern_metric_size)
-               height = max_pattern_metric_size;
+       height = max(height, min_pattern_metric_size);
+       height = min(height, max_pattern_metric_size);
 
        const Pattern10MapKey key (width, height,
                        stp[0], stp[1], stp[2], stp[3],
@@ -297,7 +343,7 @@ FastMeter::request_vertical_meter(
        // TODO flush pattern cache if it gets too large
 
        Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
-               width, height, clr, stp, styleflags);
+               width, height, clr, stp, styleflags, false);
        vm_pattern_cache[key] = p;
 
        return p;
@@ -307,10 +353,9 @@ Cairo::RefPtr<Cairo::Pattern>
 FastMeter::request_vertical_background(
                int width, int height, int *bgc, bool shade)
 {
-       if (height < min_pattern_metric_size)
-               height = min_pattern_metric_size;
-       if (height > max_pattern_metric_size)
-               height = max_pattern_metric_size;
+       height = max(height, min_pattern_metric_size);
+       height = min(height, max_pattern_metric_size);
+       height += 2;
 
        const PatternBgMapKey key (width, height, bgc[0], bgc[1]);
        PatternBgMap::iterator i;
@@ -320,12 +365,62 @@ FastMeter::request_vertical_background(
        // TODO flush pattern cache if it gets too large
 
        Cairo::RefPtr<Cairo::Pattern> p = generate_meter_background (
-               width, height, bgc, shade);
+               width, height, bgc, shade, false);
        vb_pattern_cache[key] = p;
 
        return p;
 }
 
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::request_horizontal_meter(
+               int width, int height, int *clr, float *stp, int styleflags)
+{
+       width = max(width, min_pattern_metric_size);
+       width = min(width, max_pattern_metric_size);
+
+       const Pattern10MapKey key (width, height,
+                       stp[0], stp[1], stp[2], stp[3],
+                       clr[0], clr[1], clr[2], clr[3],
+                       clr[4], clr[5], clr[6], clr[7],
+                       clr[8], clr[9], styleflags);
+
+       Pattern10Map::iterator i;
+       if ((i = hm_pattern_cache.find (key)) != hm_pattern_cache.end()) {
+               return i->second;
+       }
+       // TODO flush pattern cache if it gets too large
+
+       Cairo::RefPtr<Cairo::Pattern> p = generate_meter_pattern (
+               height, width, clr, stp, styleflags, true);
+
+       hm_pattern_cache[key] = p;
+       return p;
+}
+
+Cairo::RefPtr<Cairo::Pattern>
+FastMeter::request_horizontal_background(
+               int width, int height, int *bgc, bool shade)
+{
+       width = max(width, min_pattern_metric_size);
+       width = min(width, max_pattern_metric_size);
+       width += 2;
+
+       const PatternBgMapKey key (width, height, bgc[0], bgc[1]);
+       PatternBgMap::iterator i;
+       if ((i = hb_pattern_cache.find (key)) != hb_pattern_cache.end()) {
+               return i->second;
+       }
+       // TODO flush pattern cache if it gets too large
+
+       Cairo::RefPtr<Cairo::Pattern> p = generate_meter_background (
+               height, width, bgc, shade, true);
+
+       hb_pattern_cache[key] = p;
+
+       return p;
+}
+
+
 
 void
 FastMeter::set_hold_count (long val)
@@ -343,6 +438,16 @@ FastMeter::set_hold_count (long val)
 
 void
 FastMeter::on_size_request (GtkRequisition* req)
+{
+       if (orientation == Vertical) {
+               vertical_size_request (req);
+       } else {
+               horizontal_size_request (req);
+       }
+}
+
+void
+FastMeter::vertical_size_request (GtkRequisition* req)
 {
        req->height = request_height;
        req->height = max(req->height, min_pattern_metric_size);
@@ -352,8 +457,29 @@ FastMeter::on_size_request (GtkRequisition* req)
        req->width  = request_width;
 }
 
+void
+FastMeter::horizontal_size_request (GtkRequisition* req)
+{
+       req->width = request_width;
+       req->width = max(req->width, min_pattern_metric_size);
+       req->width = min(req->width, max_pattern_metric_size);
+       req->width += 2;
+
+       req->height  = request_height;
+}
+
 void
 FastMeter::on_size_allocate (Gtk::Allocation &alloc)
+{
+       if (orientation == Vertical) {
+               vertical_size_allocate (alloc);
+       } else {
+               horizontal_size_allocate (alloc);
+       }
+}
+
+void
+FastMeter::vertical_size_allocate (Gtk::Allocation &alloc)
 {
        if (alloc.get_width() != request_width) {
                alloc.set_width (request_width);
@@ -377,10 +503,39 @@ FastMeter::on_size_allocate (Gtk::Allocation &alloc)
        DrawingArea::on_size_allocate (alloc);
 }
 
+void
+FastMeter::horizontal_size_allocate (Gtk::Allocation &alloc)
+{
+       if (alloc.get_height() != request_height) {
+               alloc.set_height (request_height);
+       }
+
+       int w = alloc.get_width();
+       w = max (w, min_pattern_metric_size + 2);
+       w = min (w, max_pattern_metric_size + 2);
+
+       if (w != alloc.get_width()) {
+               alloc.set_width (w);
+       }
+
+       if (pixwidth != w) {
+               fgpattern = request_horizontal_meter (w, request_height, _clr, _stp, _styleflags);
+               bgpattern = request_horizontal_background (w, request_height, highlight ? _bgh : _bgc, highlight);
+               pixwidth = w - 2;
+               pixheight  = request_height - 2;
+       }
+
+       DrawingArea::on_size_allocate (alloc);
+}
+
 bool
 FastMeter::on_expose_event (GdkEventExpose* ev)
 {
-       return vertical_expose (ev);
+       if (orientation == Vertical) {
+               return vertical_expose (ev);
+       } else {
+               return horizontal_expose (ev);
+       }
 }
 
 bool
@@ -397,7 +552,7 @@ FastMeter::vertical_expose (GdkEventExpose* ev)
        cairo_clip (cr);
 
        cairo_set_source_rgb (cr, 0, 0, 0); // black
-       rounded_rectangle (cr, 0, 0, pixrect.width + 2, pixheight + 2, 2);
+       rounded_rectangle (cr, 0, 0, pixwidth + 2, pixheight + 2, 2);
        cairo_stroke (cr);
 
        top_of_meter = (gint) floor (pixheight * current_level);
@@ -439,7 +594,80 @@ FastMeter::vertical_expose (GdkEventExpose* ev)
                }
 
                cairo_set_source (cr, fgpattern->cobj());
-               cairo_rectangle (cr, 1, last_peak_rect.y, pixwidth, last_peak_rect.height);
+               cairo_rectangle (cr, last_peak_rect.x, last_peak_rect.y, last_peak_rect.width, last_peak_rect.height);
+
+               if (bright_hold && !no_rgba_overlay) {
+                       cairo_fill_preserve (cr);
+                       cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.3);
+               }
+               cairo_fill (cr);
+
+       } else {
+               last_peak_rect.width = 0;
+               last_peak_rect.height = 0;
+       }
+
+       cairo_destroy (cr);
+
+       return TRUE;
+}
+
+bool
+FastMeter::horizontal_expose (GdkEventExpose* ev)
+{
+       Glib::RefPtr<Gdk::Window> win = get_window ();
+       gint right_of_meter;
+       GdkRectangle intersection;
+       GdkRectangle background;
+
+       cairo_t* cr = gdk_cairo_create (get_window ()->gobj());
+
+       cairo_rectangle (cr, ev->area.x, ev->area.y, ev->area.width, ev->area.height);
+       cairo_clip (cr);
+
+       cairo_set_source_rgb (cr, 0, 0, 0); // black
+       rounded_rectangle (cr, 0, 0, pixwidth + 2, pixheight + 2, 2);
+       cairo_stroke (cr);
+
+       right_of_meter = (gint) floor (pixwidth * current_level);
+
+       /* reset the height & origin of the rect that needs to show the pixbuf
+        */
+
+       pixrect.width = right_of_meter;
+
+       background.x = 1 + right_of_meter;
+       background.y = 1;
+       background.width = pixwidth - right_of_meter;
+       background.height = pixheight;
+
+       if (gdk_rectangle_intersect (&background, &ev->area, &intersection)) {
+               cairo_set_source (cr, bgpattern->cobj());
+               cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+               cairo_fill (cr);
+       }
+
+       if (gdk_rectangle_intersect (&pixrect, &ev->area, &intersection)) {
+               cairo_set_source (cr, fgpattern->cobj());
+               cairo_rectangle (cr, intersection.x, intersection.y, intersection.width, intersection.height);
+               cairo_fill (cr);
+       }
+
+       // draw peak bar
+
+       if (hold_state) {
+               last_peak_rect.y = 1;
+               last_peak_rect.height = pixheight;
+               const int xpos = floor (pixwidth * current_peak);
+               if (bright_hold) {
+                       last_peak_rect.width = min(4, xpos );
+               } else {
+                       last_peak_rect.width = min(2, xpos );
+               }
+               last_peak_rect.x = 1 + max(0, xpos - last_peak_rect.width);
+
+               cairo_set_source (cr, fgpattern->cobj());
+               cairo_rectangle (cr, last_peak_rect.x, last_peak_rect.y, last_peak_rect.width, last_peak_rect.height);
 
                if (bright_hold && !no_rgba_overlay) {
                        cairo_fill_preserve (cr);
@@ -494,7 +722,11 @@ FastMeter::set (float lvl, float peak)
                return;
        }
 
-       queue_vertical_redraw (win, old_level);
+       if (orientation == Vertical) {
+               queue_vertical_redraw (win, old_level);
+       } else {
+               queue_horizontal_redraw (win, old_level);
+       }
 }
 
 void
@@ -575,6 +807,81 @@ FastMeter::queue_vertical_redraw (const Glib::RefPtr<Gdk::Window>& win, float ol
        }
 }
 
+void
+FastMeter::queue_horizontal_redraw (const Glib::RefPtr<Gdk::Window>& win, float old_level)
+{
+#if 1
+       GdkRectangle rect;
+
+       gint new_right = (gint) floor (pixwidth * current_level);
+
+       rect.height = pixheight;
+       rect.y = 1;
+
+       if (current_level > old_level) {
+               rect.x = 1 + pixrect.width;
+               /* colored/pixbuf got larger, just draw the new section */
+               rect.width = new_right - pixrect.width;
+       } else {
+               /* it got smaller, compute the difference */
+               rect.x = 1 + new_right;
+               /* rect.height is the old.x (smaller) minus the new.x (larger) */
+               rect.width = pixrect.width - new_right;
+       }
+
+       GdkRegion* region = 0;
+       bool queue = false;
+
+       if (rect.height != 0) {
+
+               /* ok, first region to draw ... */
+
+               region = gdk_region_rectangle (&rect);
+               queue = true;
+       }
+
+       /* redraw the last place where the last peak hold bar was;
+          the next expose will draw the new one whether its part of
+          expose region or not.
+       */
+
+       if (last_peak_rect.width * last_peak_rect.height != 0) {
+               if (!queue) {
+                       region = gdk_region_new ();
+                       queue = true;
+               }
+               gdk_region_union_with_rect (region, &last_peak_rect);
+       }
+
+       if (hold_state && current_peak > 0) {
+               if (!queue) {
+                       region = gdk_region_new ();
+                       queue = true;
+               }
+               rect.y = 1;
+               rect.height = pixheight;
+               const int xpos = floor (pixwidth * current_peak);
+               if (bright_hold) {
+                       rect.width = min(4, xpos);
+               } else {
+                       rect.width = min(2, xpos);
+               }
+               rect.x = 1 + max(0, xpos - rect.width);
+               gdk_region_union_with_rect (region, &rect);
+       }
+
+       if (queue) {
+               gdk_window_invalidate_region (win->gobj(), region, true);
+       }
+       if (region) {
+               gdk_region_destroy(region);
+               region = 0;
+       }
+#else
+       queue_draw ();
+#endif
+}
+
 void
 FastMeter::set_highlight (bool onoff)
 {
@@ -582,7 +889,11 @@ FastMeter::set_highlight (bool onoff)
                return;
        }
        highlight = onoff;
-       bgpattern = request_vertical_background (request_width, pixheight, highlight ? _bgh : _bgc, highlight);
+       if (orientation == Vertical) {
+               bgpattern = request_vertical_background (request_width, request_height, highlight ? _bgh : _bgc, highlight);
+       } else {
+               bgpattern = request_horizontal_background (request_width, request_height, highlight ? _bgh : _bgc, highlight);
+       }
        queue_draw ();
 }