ardour/livetrax
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clean up ArdourCanvas::Arrow implementation to remove unshown polygon/head

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This commit is contained in:
Paul Davis 2014-05-22 22:33:04 -04:00
parent dc349514fa
commit f17b84ad10
2 changed files with 30 additions and 11 deletions
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40
libs/canvas/arrow.cc
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@ -22,7 +22,10 @@
* @brief Implementation of the Arrow canvas object.
*/
#include "pbd/compose.h"
#include "canvas/arrow.h"
#include "canvas/debug.h"
#include "canvas/polygon.h"
#include "canvas/line.h"
@ -39,14 +42,15 @@ Arrow::Arrow (Group* parent)
/* set up default arrow heads at each end */
for (int i = 0; i < 2; ++i) {
_heads[i].polygon = new Polygon (this);
_heads[i].show = true;
_heads[i].outward = true;
_heads[i].width = 4;
_heads[i].height = 4;
setup_polygon (i);
CANVAS_DEBUG_NAME (_heads[i].polygon, string_compose ("arrow head %1", i));
}
_line = new Line (this);
CANVAS_DEBUG_NAME (_line, "arrow line");
}
/** Set whether to show an arrow head at one end or other
@ -61,9 +65,13 @@ Arrow::set_show_head (int which, bool show)
begin_change ();
_heads[which].show = show;
if (!show) {
delete _heads[which].polygon;
_heads[which].polygon = 0;
} else {
setup_polygon (which);
}
setup_polygon (which);
_bounding_box_dirty = true;
end_change ();
}
@ -131,8 +139,12 @@ void
Arrow::set_outline_width (Distance width)
{
_line->set_outline_width (width);
_heads[0].polygon->set_outline_width (width);
_heads[1].polygon->set_outline_width (width);
if (_heads[0].polygon) {
_heads[0].polygon->set_outline_width (width);
}
if (_heads[1].polygon) {
_heads[1].polygon->set_outline_width (width);
}
}
/** Set the x position of our line.
@ -144,7 +156,9 @@ Arrow::set_x (Coord x)
_line->set_x0 (x);
_line->set_x1 (x);
for (int i = 0; i < 2; ++i) {
_heads[i].polygon->set_x_position (x - _heads[i].width / 2);
if (_heads[i].polygon) {
_heads[i].polygon->set_x_position (x - _heads[i].width / 2);
}
}
}
@ -156,7 +170,9 @@ void
Arrow::set_y0 (Coord y0)
{
_line->set_y0 (y0);
_heads[0].polygon->set_y_position (y0);
if (_heads[0].polygon) {
_heads[0].polygon->set_y_position (y0);
}
}
/** Set the y position of end 1 of our line.
@ -166,7 +182,9 @@ void
Arrow::set_y1 (Coord y1)
{
_line->set_y1 (y1);
_heads[1].polygon->set_y_position (y1 - _heads[1].height);
if (_heads[1].polygon) {
_heads[1].polygon->set_y_position (y1 - _heads[1].height);
}
}
/** @return x position of our line in pixels (in our coordinate system) */
@ -217,8 +235,10 @@ Arrow::set_color (Color color)
{
_line->set_outline_color (color);
for (int i = 0; i < 2; ++i) {
_heads[i].polygon->set_outline_color (color);
_heads[i].polygon->set_fill_color (color);
if (_heads[i].polygon) {
_heads[i].polygon->set_outline_color (color);
_heads[i].polygon->set_fill_color (color);
}
}
}

1
libs/canvas/canvas/arrow.h
View File

@ -72,7 +72,6 @@ private:
/** Representation of a single arrow head */
struct Head {
Polygon* polygon; ///< the polygon which represents its shape
bool show; ///< true if this head should be visible
bool outward; ///< true if this head points out from the line
Distance height; ///< the height of the head
Distance width; ///< the maximum width of the head