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add the ability to use cairo scaling to warp the rendering of the main clock text

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This commit is contained in:
Paul Davis 2014-12-31 06:52:47 -05:00
parent 168d187994
commit d8405e2ebe
2 changed files with 35 additions and 1 deletions
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25
gtk2_ardour/audio_clock.cc
View File

@ -95,6 +95,8 @@ AudioClock::AudioClock (const string& clock_name, bool transient, const string&
, last_sdelta (0)
, dragging (false)
, drag_field (Field (0))
, xscale (1.0)
, yscale (1.0)
{
set_flags (CAN_FOCUS);
@ -277,6 +279,15 @@ AudioClock::set_colors ()
queue_draw ();
}
void
AudioClock::set_scale (double x, double y)
{
xscale = x;
yscale = y;
queue_draw ();
}
void
AudioClock::render (cairo_t* cr, cairo_rectangle_t*)
{
@ -296,10 +307,22 @@ AudioClock::render (cairo_t* cr, cairo_rectangle_t*)
cairo_fill (cr);
}
cairo_move_to (cr, (get_width() - layout_width) / 2.0, (upper_height - layout_height) / 2.0);
double lw = layout_width * xscale;
double lh = layout_height * yscale;
cairo_move_to (cr, (get_width() - lw) / 2.0, (upper_height - lh) / 2.0);
if (xscale != 1.0 || yscale != 1.0) {
cairo_save (cr);
cairo_scale (cr, xscale, yscale);
}
pango_cairo_show_layout (cr, _layout->gobj());
if (xscale != 1.0 || yscale != 1.0) {
cairo_restore (cr);
}
if (_left_layout) {
double h = get_height() - upper_height - separator_height;

11
gtk2_ardour/audio_clock.h
View File

@ -77,6 +77,14 @@ class AudioClock : public CairoWidget, public ARDOUR::SessionHandlePtr
void set_session (ARDOUR::Session *s);
void set_negative_allowed (bool yn);
/** Alter cairo scaling during rendering.
*
* Used by clocks that resize themselves
* to fit any given space. Can lead
* to font distortion.
*/
void set_scale (double x, double y);
static void print_minsec (framepos_t, char* buf, size_t bufsize, float frame_rate);
sigc::signal<void> ValueChanged;
@ -232,6 +240,9 @@ class AudioClock : public CairoWidget, public ARDOUR::SessionHandlePtr
double bg_r, bg_g, bg_b, bg_a;
double cursor_r, cursor_g, cursor_b, cursor_a;
double xscale;
double yscale;
};
#endif /* __audio_clock_h__ */