smokephil/ardour
1
0
Fork 0
mirror of https://github.com/Ardour/ardour.git synced 2026-01-23 21:57:16 +01:00
Code Issues Projects Releases Wiki Activity

refine stereo-panner GUI:

Browse source 
* cairo pixel alignment
* use pango for text
This commit is contained in:
Robin Gareus 2014-01-09 18:19:57 +01:00
parent 5d3b441bf7
commit d343ffbde5
2 changed files with 63 additions and 46 deletions
Download patch file Download diff file Expand all files Collapse all files

106
gtk2_ardour/stereo_panner.cc
View file

@ -22,6 +22,7 @@
#include <cmath>
#include <gtkmm/window.h>
#include <pangomm/layout.h>
#include "pbd/controllable.h"
#include "pbd/compose.h"
@ -57,6 +58,9 @@ static const int top_step = 2;
StereoPanner::ColorScheme StereoPanner::colors[3];
bool StereoPanner::have_colors = false;
Pango::AttrList StereoPanner::panner_font_attributes;
bool StereoPanner::have_font = false;
using namespace ARDOUR;
StereoPanner::StereoPanner (boost::shared_ptr<PannerShell> p)
@ -79,6 +83,17 @@ StereoPanner::StereoPanner (boost::shared_ptr<PannerShell> p)
set_colors ();
have_colors = true;
}
if (!have_font) {
Pango::FontDescription font;
Pango::AttrFontDesc* font_attr;
font = Pango::FontDescription ("ArdourMono");
font.set_weight (Pango::WEIGHT_BOLD);
font.set_size(9 * PANGO_SCALE);
font_attr = new Pango::AttrFontDesc (Pango::Attribute::create_attr_font_desc (font));
panner_font_attributes.change(*font_attr);
delete font_attr;
have_font = true;
}
position_control->Changed.connect (connections, invalidator(*this), boost::bind (&StereoPanner::value_change, this), gui_context());
width_control->Changed.connect (connections, invalidator(*this), boost::bind (&StereoPanner::value_change, this), gui_context());
@ -124,14 +139,17 @@ StereoPanner::on_expose_event (GdkEventExpose*)
Glib::RefPtr<Gdk::Window> win (get_window());
Glib::RefPtr<Gdk::GC> gc (get_style()->get_base_gc (get_state()));
Cairo::RefPtr<Cairo::Context> context = get_window()->create_cairo_context();
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create(get_pango_context());
layout->set_attributes (panner_font_attributes);
int tw, th;
int width, height;
double pos = position_control->get_value (); /* 0..1 */
double swidth = width_control->get_value (); /* -1..+1 */
double fswidth = fabs (swidth);
const double pos = position_control->get_value (); /* 0..1 */
const double swidth = width_control->get_value (); /* -1..+1 */
const double fswidth = fabs (swidth);
const double corner_radius = 5.0;
uint32_t o, f, t, b, r;
State state;
const double corner_radius = 5.0;
width = get_width();
height = get_height ();
@ -162,7 +180,8 @@ StereoPanner::on_expose_event (GdkEventExpose*)
context->set_source_rgba (UINT_RGBA_R_FLT(b), UINT_RGBA_G_FLT(b), UINT_RGBA_B_FLT(b), UINT_RGBA_A_FLT(b));
cairo_rectangle (context->cobj(), 0, 0, width, height);
context->fill ();
context->fill_preserve ();
context->clip();
/* the usable width is reduced from the real width, because we need space for
the two halves of LR boxes that will extend past the actual left/right
@ -181,17 +200,15 @@ StereoPanner::on_expose_event (GdkEventExpose*)
context->translate (1.0, 0.0);
}
double center = (lr_box_size/2.0) + (usable_width * pos);
const double pan_spread = (fswidth * usable_width)/2.0;
const double half_lr_box = lr_box_size/2.0;
int left;
int right;
const double center = rint(half_lr_box + (usable_width * pos));
const double pan_spread = rint((fswidth * (usable_width-1.0))/2.0);
const double left = center - pan_spread;
const double right = center + pan_spread;
left = center - pan_spread; // center of left box
right = center + pan_spread; // center of right box
printf("L %.2f R %.2f PW:%.2f\n", left, right, pan_spread);
/* center line */
context->set_line_width (1.0);
context->move_to ((usable_width + lr_box_size)/2.0, 0);
context->rel_line_to (0, height);
@ -199,67 +216,64 @@ StereoPanner::on_expose_event (GdkEventExpose*)
context->stroke ();
/* compute & draw the line through the box */
context->set_line_width (2);
context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
context->move_to (left, top_step+(pos_box_size/2.0)+step_down);
context->line_to (left, top_step+(pos_box_size/2.0));
context->line_to (right, top_step+(pos_box_size/2.0));
context->line_to (right, top_step+(pos_box_size/2.0) + step_down);
context->move_to (left, top_step + (pos_box_size/2.0) + step_down + 1.0);
context->line_to (left, top_step + (pos_box_size/2.0));
context->line_to (right, top_step + (pos_box_size/2.0));
context->line_to (right, top_step + (pos_box_size/2.0) + step_down + 1.0);
context->stroke ();
context->set_line_width (1.0);
/* left box */
rounded_rectangle (context, left - half_lr_box,
half_lr_box+step_down,
lr_box_size, lr_box_size, corner_radius);
context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
context->stroke_preserve ();
context->set_source_rgba (UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
context->fill ();
/* add text */
context->move_to (left - half_lr_box + 3,
(lr_box_size/2) + step_down + 13);
context->select_font_face ("sans-serif", Cairo::FONT_SLANT_NORMAL, Cairo::FONT_WEIGHT_BOLD);
if (state != Mono) {
rounded_rectangle (context, left - half_lr_box,
half_lr_box+step_down,
lr_box_size, lr_box_size, corner_radius);
context->set_source_rgba (UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
context->fill_preserve();
context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
context->stroke();
/* add text */
context->set_source_rgba (UINT_RGBA_R_FLT(t), UINT_RGBA_G_FLT(t), UINT_RGBA_B_FLT(t), UINT_RGBA_A_FLT(t));
if (swidth < 0.0) {
context->show_text (_("R"));
layout->set_text (_("R"));
} else {
context->show_text (_("L"));
layout->set_text (_("L"));
}
layout->get_pixel_size(tw, th);
context->move_to (rint(left - tw/2), rint(lr_box_size + step_down - th/2));
pango_cairo_show_layout (context->cobj(), layout->gobj());
}
/* right box */
rounded_rectangle (context, right - half_lr_box,
half_lr_box+step_down,
lr_box_size, lr_box_size, corner_radius);
context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
context->stroke_preserve ();
half_lr_box+step_down,
lr_box_size, lr_box_size, corner_radius);
context->set_source_rgba (UINT_RGBA_R_FLT(f), UINT_RGBA_G_FLT(f), UINT_RGBA_B_FLT(f), UINT_RGBA_A_FLT(f));
context->fill ();
context->fill_preserve();
context->set_source_rgba (UINT_RGBA_R_FLT(o), UINT_RGBA_G_FLT(o), UINT_RGBA_B_FLT(o), UINT_RGBA_A_FLT(o));
context->stroke();
/* add text */
context->move_to (right - half_lr_box + 3, (lr_box_size/2)+step_down + 13);
context->set_source_rgba (UINT_RGBA_R_FLT(t), UINT_RGBA_G_FLT(t), UINT_RGBA_B_FLT(t), UINT_RGBA_A_FLT(t));
if (state == Mono) {
context->show_text (_("M"));
layout->set_text (_("M"));
} else {
if (swidth < 0.0) {
context->show_text (_("L"));
layout->set_text (_("L"));
} else {
context->show_text (_("R"));
layout->set_text (_("R"));
}
}
layout->get_pixel_size(tw, th);
context->move_to (rint(right - tw/2), rint(lr_box_size + step_down - th/2));
pango_cairo_show_layout (context->cobj(), layout->gobj());
/* draw the central box */
context->set_line_width (2.0);
context->move_to (center + (pos_box_size/2.0), top_step); /* top right */
context->rel_line_to (0.0, pos_box_size); /* lower right */

3
gtk2_ardour/stereo_panner.h
View file

@ -95,6 +95,9 @@ class StereoPanner : public PannerInterface
bool _dragging;
static Pango::AttrList panner_font_attributes;
static bool have_font;
static ColorScheme colors[3];
static void set_colors ();
static bool have_colors;