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https://github.com/Ardour/ardour.git
synced 2025-12-07 23:35:03 +01:00
many changes to get the cairo-canvas version much, much more functional. still problems with a lot of subtle and not-so-subtle issues
This commit is contained in:
Paul Davis
parent
1fda7b293a
commit
ee1f0520a8
10 changed files with 175 additions and 123 deletions
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@ -24,6 +24,7 @@
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#include <cassert>
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#include <gtkmm/adjustment.h>
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#include <gtkmm/label.h>
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#include "pbd/xml++.h"
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#include "pbd/compose.h"
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@ -39,6 +40,8 @@ using namespace ArdourCanvas;
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Canvas::Canvas ()
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: _root (this)
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, _log_renders (true)
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, _scroll_offset_x (0)
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, _scroll_offset_y (0)
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{
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set_epoch ();
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}
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@ -49,6 +52,8 @@ Canvas::Canvas ()
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Canvas::Canvas (XMLTree const * tree)
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: _root (this)
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, _log_renders (true)
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, _scroll_offset_x (0)
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, _scroll_offset_y (0)
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{
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set_epoch ();
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@ -70,6 +75,13 @@ Canvas::Canvas (XMLTree const * tree)
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}
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}
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void
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Canvas::scroll_to (Coord x, Coord y)
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{
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_scroll_offset_x = x;
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_scroll_offset_y = y;
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}
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/** Render an area of the canvas.
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* @param area Area in canvas coordinates.
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* @param context Cairo context to render to.
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@ -85,9 +97,21 @@ Canvas::render (Rect const & area, Cairo::RefPtr<Cairo::Context> const & context
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}
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#endif
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checkpoint ("render", "-> render");
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// checkpoint ("render", "-> render");
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render_count = 0;
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#ifdef CANVAS_DEBUG
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if (getenv ("ARDOUR_HARLEQUIN_CANVAS")) {
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/* light up the canvas to show redraws */
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context->set_source_rgba (random()%255 / 255.0,
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random()%255 / 255.0,
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random()%255 / 255.0,
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255);
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context->rectangle (area.x0, area.y0, area.width(), area.height());
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context->fill ();
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}
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#endif
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context->save ();
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/* clip to the requested area */
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@ -97,7 +121,7 @@ Canvas::render (Rect const & area, Cairo::RefPtr<Cairo::Context> const & context
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boost::optional<Rect> root_bbox = _root.bounding_box();
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if (!root_bbox) {
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/* the root has no bounding box, so there's nothing to render */
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checkpoint ("render", "no root bbox");
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// checkpoint ("render", "no root bbox");
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context->restore ();
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return;
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}
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@ -107,7 +131,9 @@ Canvas::render (Rect const & area, Cairo::RefPtr<Cairo::Context> const & context
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/* there's a common area between the root and the requested
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area, so render it.
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*/
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checkpoint ("render", "... root");
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// checkpoint ("render", "... root");
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context->stroke ();
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_root.render (*draw, context);
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}
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@ -117,7 +143,7 @@ Canvas::render (Rect const & area, Cairo::RefPtr<Cairo::Context> const & context
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context->restore ();
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checkpoint ("render", "<- render");
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// checkpoint ("render", "<- render");
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}
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ostream&
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@ -412,52 +438,6 @@ GtkCanvas::item_going_away (Item* item, boost::optional<Rect> bounding_box)
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}
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}
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/** Construct an ImageCanvas.
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* @param size Size in pixels.
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*/
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ImageCanvas::ImageCanvas (Duple size)
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: _surface (Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, size.x, size.y))
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{
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_context = Cairo::Context::create (_surface);
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}
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/** Construct an ImageCanvas from an XML tree.
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* @param tree XML Tree.
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* @param size Size in pixels.
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*/
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ImageCanvas::ImageCanvas (XMLTree const * tree, Duple size)
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: Canvas (tree)
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, _surface (Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, size.x, size.y))
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{
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_context = Cairo::Context::create (_surface);
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}
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/** Render the canvas to our pixbuf.
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* @param area Area to render, in canvas coordinates.
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*/
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void
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ImageCanvas::render_to_image (Rect const & area) const
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{
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render (area, _context);
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}
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/** Write our pixbuf to a PNG file.
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* @param f PNG file name.
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*/
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void
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ImageCanvas::write_to_png (string const & f)
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{
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assert (_surface);
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_surface->write_to_png (f);
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}
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/** @return Our Cairo context */
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Cairo::RefPtr<Cairo::Context>
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ImageCanvas::context ()
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{
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return _context;
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}
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/** Handler for GDK expose events.
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* @param ev Event.
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* @return true if the event was handled.
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@ -465,8 +445,30 @@ ImageCanvas::context ()
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bool
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GtkCanvas::on_expose_event (GdkEventExpose* ev)
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{
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Cairo::RefPtr<Cairo::Context> c = get_window()->create_cairo_context ();
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render (Rect (ev->area.x, ev->area.y, ev->area.x + ev->area.width, ev->area.y + ev->area.height), c);
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/* WINDOW CANVAS
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* 0,0 _scroll_offset_x, _scroll_offset_y
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*/
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/* render using canvas coordinates */
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Rect canvas_area (ev->area.x, ev->area.y, ev->area.x + ev->area.width, ev->area.y + ev->area.height);
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canvas_area = canvas_area.translate (Duple (_scroll_offset_x, _scroll_offset_y));
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/* things are going to render to the cairo surface with canvas
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* coordinates:
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*
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* an item at window/cairo 0,0 will have canvas_coords _scroll_offset_x,_scroll_offset_y
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*
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* let them render at their natural coordinates by using cairo_translate()
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*/
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c->translate (-_scroll_offset_x, -_scroll_offset_y);
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render (canvas_area, c);
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return true;
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}
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@ -489,10 +491,18 @@ GtkCanvas::context ()
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bool
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GtkCanvas::on_button_press_event (GdkEventButton* ev)
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{
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/* translate event coordinates from window to canvas */
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GdkEvent copy = *((GdkEvent*)ev);
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Duple where = window_to_canvas (Duple (ev->x, ev->y));
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copy.button.x = where.x;
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copy.button.y = where.y;
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/* Coordinates in the event will be canvas coordinates, correctly adjusted
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for scroll if this GtkCanvas is in a GtkCanvasViewport.
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*/
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return button_handler (ev);
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return button_handler ((GdkEventButton*) ©);
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}
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/** Handler for GDK button release events.
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@ -501,11 +511,19 @@ GtkCanvas::on_button_press_event (GdkEventButton* ev)
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*/
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bool
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GtkCanvas::on_button_release_event (GdkEventButton* ev)
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{
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{
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/* translate event coordinates from window to canvas */
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GdkEvent copy = *((GdkEvent*)ev);
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Duple where = window_to_canvas (Duple (ev->x, ev->y));
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copy.button.x = where.x;
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copy.button.y = where.y;
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/* Coordinates in the event will be canvas coordinates, correctly adjusted
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for scroll if this GtkCanvas is in a GtkCanvasViewport.
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*/
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return button_handler (ev);
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return button_handler ((GdkEventButton*) ©);
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}
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/** Handler for GDK motion events.
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@ -515,18 +533,27 @@ GtkCanvas::on_button_release_event (GdkEventButton* ev)
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bool
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GtkCanvas::on_motion_notify_event (GdkEventMotion* ev)
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{
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/* translate event coordinates from window to canvas */
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GdkEvent copy = *((GdkEvent*)ev);
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Duple where = window_to_canvas (Duple (ev->x, ev->y));
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copy.motion.x = where.x;
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copy.motion.y = where.y;
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/* Coordinates in the event will be canvas coordinates, correctly adjusted
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for scroll if this GtkCanvas is in a GtkCanvasViewport.
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*/
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return motion_notify_handler (ev);
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return motion_notify_handler ((GdkEventMotion*) ©);
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}
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/** Called to request a redraw of our canvas.
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* @param area Area to redraw, in canvas coordinates.
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*/
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void
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GtkCanvas::request_redraw (Rect const & area)
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GtkCanvas::request_redraw (Rect const & request)
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{
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Rect area = canvas_to_window (request);
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queue_draw_area (floor (area.x0), floor (area.y0), ceil (area.x1) - floor (area.x0), ceil (area.y1) - floor (area.y0));
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}
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@ -574,17 +601,56 @@ GtkCanvas::ungrab ()
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* @param vadj Adjustment to use for vertica scrolling.
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*/
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GtkCanvasViewport::GtkCanvasViewport (Gtk::Adjustment& hadj, Gtk::Adjustment& vadj)
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: Viewport (hadj, vadj)
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: Alignment (0, 0, 1.0, 1.0)
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, hadjustment (hadj)
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, vadjustment (vadj)
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{
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add (_canvas);
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hadj.signal_value_changed().connect (sigc::mem_fun (*this, &GtkCanvasViewport::scrolled));
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vadj.signal_value_changed().connect (sigc::mem_fun (*this, &GtkCanvasViewport::scrolled));
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}
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void
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GtkCanvasViewport::scrolled ()
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{
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_canvas.scroll_to (hadjustment.get_value(), vadjustment.get_value());
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queue_draw ();
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}
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Duple
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GtkCanvas::window_to_canvas (Duple const & d) const
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{
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return d.translate (Duple (_scroll_offset_x, _scroll_offset_y));
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}
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Duple
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GtkCanvas::canvas_to_window (Duple const & d) const
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{
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return d.translate (Duple (-_scroll_offset_x, -_scroll_offset_y));
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}
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Rect
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GtkCanvas::window_to_canvas (Rect const & r) const
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{
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return r.translate (Duple (_scroll_offset_x, _scroll_offset_y));
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}
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Rect
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GtkCanvas::canvas_to_window (Rect const & r) const
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{
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return r.translate (Duple (-_scroll_offset_x, -_scroll_offset_y));
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}
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/** Handler for when GTK asks us what minimum size we want.
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* @param req Requsition to fill in.
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*/
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void
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GtkCanvasViewport::on_size_request (Gtk::Requisition* req)
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{
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/* force the canvas to size itself */
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// _canvas.root()->bounding_box();
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req->width = 16;
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req->height = 16;
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}
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@ -599,15 +665,16 @@ GtkCanvasViewport::on_size_request (Gtk::Requisition* req)
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void
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GtkCanvasViewport::window_to_canvas (int wx, int wy, Coord& cx, Coord& cy) const
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{
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cx = wx + get_hadjustment()->get_value ();
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cy = wy + get_vadjustment()->get_value ();
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Duple d = _canvas.window_to_canvas (Duple (wx, wy));
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cx = d.x;
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cy = d.y;
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}
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/** @return The visible area of the canvas, in canvas coordinates */
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Rect
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GtkCanvasViewport::visible_area () const
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{
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Distance const xo = get_hadjustment()->get_value ();
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Distance const yo = get_vadjustment()->get_value ();
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Distance const xo = hadjustment.get_value ();
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Distance const yo = vadjustment.get_value ();
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return Rect (xo, yo, xo + get_allocation().get_width (), yo + get_allocation().get_height ());
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}
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