362 lines
8.4 KiB
C++
362 lines
8.4 KiB
C++
/*
|
|
Copyright (C) 2016 Paul Davis
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
#include "gtkmm2ext/pane.h"
|
|
|
|
#include "i18n.h"
|
|
|
|
using namespace PBD;
|
|
using namespace Gtk;
|
|
using namespace Gtkmm2ext;
|
|
using namespace std;
|
|
|
|
Pane::Pane (bool h)
|
|
: horizontal (h)
|
|
, dragging (false)
|
|
, divider_width (5)
|
|
{
|
|
set_has_window (false);
|
|
}
|
|
|
|
void
|
|
Pane::on_size_request (GtkRequisition* req)
|
|
{
|
|
GtkRequisition largest;
|
|
|
|
/* iterate over all children, get their size requests */
|
|
|
|
/* horizontal pane is as high as its tallest child, but has no width
|
|
* requirement.
|
|
*
|
|
* vertical pane is as wide as its widest child, but has no height
|
|
* requirement.
|
|
*/
|
|
|
|
if (horizontal) {
|
|
largest.width = (children.size() - 1) * divider_width;
|
|
largest.height = 0;
|
|
} else {
|
|
largest.height = (children.size() - 1) * divider_width;
|
|
largest.width = 0;
|
|
}
|
|
|
|
for (Children::iterator child = children.begin(); child != children.end(); ++child) {
|
|
GtkRequisition r;
|
|
|
|
(*child)->size_request (r);
|
|
|
|
if (horizontal) {
|
|
largest.height = max (largest.height, r.height);
|
|
largest.width += r.width;
|
|
} else {
|
|
largest.width = max (largest.width, r.width);
|
|
largest.height += r.height;
|
|
}
|
|
}
|
|
|
|
*req = largest;
|
|
}
|
|
|
|
GType
|
|
Pane::child_type_vfunc() const
|
|
{
|
|
return Gtk::Widget::get_type();
|
|
}
|
|
|
|
void
|
|
Pane::add_divider ()
|
|
{
|
|
Divider* d = new Divider;
|
|
d->signal_button_press_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_press_event), d), false);
|
|
d->signal_button_release_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_release_event), d), false);
|
|
d->signal_motion_notify_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_motion_event), d), false);
|
|
d->set_parent (*this);
|
|
d->show ();
|
|
dividers.push_back (d);
|
|
}
|
|
|
|
void
|
|
Pane::on_add (Widget* w)
|
|
{
|
|
children.push_back (w);
|
|
|
|
w->set_parent (*this);
|
|
|
|
while (dividers.size() < (children.size() - 1)) {
|
|
add_divider ();
|
|
}
|
|
}
|
|
|
|
void
|
|
Pane::on_remove (Widget* w)
|
|
{
|
|
w->unparent ();
|
|
children.remove (w);
|
|
}
|
|
|
|
void
|
|
Pane::on_size_allocate (Gtk::Allocation& alloc)
|
|
{
|
|
reallocate (alloc);
|
|
Container::on_size_allocate (alloc);
|
|
}
|
|
|
|
void
|
|
Pane::reallocate (Gtk::Allocation const & alloc)
|
|
{
|
|
Children::size_type n = 0;
|
|
int remaining;
|
|
int xpos = 0;
|
|
int ypos = 0;
|
|
float fract;
|
|
|
|
if (children.empty()) {
|
|
return;
|
|
}
|
|
|
|
if (children.size() == 1) {
|
|
children.front()->size_allocate (alloc);
|
|
return;
|
|
}
|
|
|
|
if (horizontal) {
|
|
remaining = alloc.get_width ();
|
|
} else {
|
|
remaining = alloc.get_height ();
|
|
}
|
|
|
|
Children::iterator child;
|
|
Children::iterator next;
|
|
Dividers::iterator div;
|
|
|
|
for (child = children.begin(), div = dividers.begin(); child != children.end(); ++n) {
|
|
|
|
Gtk::Allocation child_alloc;
|
|
next = child;
|
|
++next;
|
|
|
|
child_alloc.set_x (xpos);
|
|
child_alloc.set_y (ypos);
|
|
|
|
if (n >= dividers.size()) {
|
|
/* the next child gets all the remaining space */
|
|
fract = 1.0;
|
|
} else {
|
|
/* the next child gets the fraction of the remaining space given by the divider that follows it */
|
|
fract = dividers[n]->fract;
|
|
}
|
|
|
|
Gtk::Requisition cr;
|
|
(*child)->size_request (cr);
|
|
|
|
if (horizontal) {
|
|
child_alloc.set_width ((gint) floor (remaining * fract));
|
|
child_alloc.set_height (alloc.get_height());
|
|
remaining = max (0, (remaining - child_alloc.get_width()));
|
|
xpos += child_alloc.get_width();
|
|
} else {
|
|
child_alloc.set_width (alloc.get_width());
|
|
child_alloc.set_height ((gint) floor (remaining * fract));
|
|
remaining = max (0, (remaining - child_alloc.get_height()));
|
|
ypos += child_alloc.get_height ();
|
|
}
|
|
|
|
(*child)->size_allocate (child_alloc);
|
|
++child;
|
|
|
|
if (child == children.end()) {
|
|
/* done, no more children, no need for a divider */
|
|
break;
|
|
}
|
|
|
|
/* add a divider between children */
|
|
|
|
Gtk::Allocation divider_allocation;
|
|
|
|
divider_allocation.set_x (xpos);
|
|
divider_allocation.set_y (ypos);
|
|
|
|
if (horizontal) {
|
|
divider_allocation.set_width (divider_width);
|
|
divider_allocation.set_height (alloc.get_height());
|
|
remaining = max (0, remaining - divider_width);
|
|
xpos += divider_width;
|
|
} else {
|
|
divider_allocation.set_width (alloc.get_width());
|
|
divider_allocation.set_height (divider_width);
|
|
remaining = max (0, remaining - divider_width);
|
|
ypos += divider_width;
|
|
}
|
|
|
|
(*div)->size_allocate (divider_allocation);
|
|
++div;
|
|
}
|
|
}
|
|
|
|
bool
|
|
Pane::on_expose_event (GdkEventExpose* ev)
|
|
{
|
|
Children::size_type n = 0;
|
|
|
|
for (Children::iterator child = children.begin(); child != children.end(); ++child, ++n) {
|
|
|
|
propagate_expose (**child, ev);
|
|
|
|
if (n < dividers.size()) {
|
|
propagate_expose (*dividers[n], ev);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
Pane::handle_press_event (GdkEventButton* ev, Divider*)
|
|
{
|
|
dragging = true;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
Pane::handle_release_event (GdkEventButton* ev, Divider*)
|
|
{
|
|
children.front()->queue_resize ();
|
|
dragging = false;
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
Pane::handle_motion_event (GdkEventMotion* ev, Divider* d)
|
|
{
|
|
if (!dragging) {
|
|
return true;
|
|
}
|
|
|
|
/* determine new position for handle */
|
|
|
|
float new_fract;
|
|
int px, py;
|
|
|
|
d->translate_coordinates (*this, ev->x, ev->y, px, py);
|
|
|
|
Dividers::iterator prev = dividers.end();
|
|
|
|
for (Dividers::iterator di = dividers.begin(); di != dividers.end(); ++di) {
|
|
if (*di == d) {
|
|
break;
|
|
}
|
|
prev = di;
|
|
}
|
|
|
|
int space_remaining;
|
|
int prev_edge;
|
|
|
|
if (horizontal) {
|
|
if (prev != dividers.end()) {
|
|
prev_edge = (*prev)->get_allocation().get_x() + (*prev)->get_allocation().get_width();
|
|
} else {
|
|
prev_edge = 0;
|
|
}
|
|
space_remaining = get_allocation().get_width() - prev_edge;
|
|
new_fract = (float) (px - prev_edge) / space_remaining;
|
|
} else {
|
|
if (prev != dividers.end()) {
|
|
prev_edge = (*prev)->get_allocation().get_y() + (*prev)->get_allocation().get_height();
|
|
} else {
|
|
prev_edge = 0;
|
|
}
|
|
space_remaining = get_allocation().get_height() - prev_edge;
|
|
new_fract = (float) (py - prev_edge) / space_remaining;
|
|
}
|
|
|
|
new_fract = min (1.0f, max (0.0f, new_fract));
|
|
|
|
if (new_fract != d->fract) {
|
|
d->fract = new_fract;
|
|
reallocate (get_allocation ());
|
|
queue_draw ();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void
|
|
Pane::set_divider (Dividers::size_type div, float fract)
|
|
{
|
|
bool redraw = false;
|
|
|
|
while (dividers.size() <= div) {
|
|
add_divider ();
|
|
}
|
|
|
|
if (fract != dividers[div]->fract) {
|
|
dividers[div]->fract = fract;
|
|
redraw = true;
|
|
}
|
|
|
|
if (redraw) {
|
|
/* our size hasn't changed, but our internal allocations have */
|
|
reallocate (get_allocation());
|
|
queue_draw ();
|
|
}
|
|
}
|
|
|
|
float
|
|
Pane::get_divider (Dividers::size_type div)
|
|
{
|
|
if (div >= dividers.size()) {
|
|
return -1;
|
|
}
|
|
|
|
return dividers[div]->fract;
|
|
}
|
|
|
|
void
|
|
Pane::forall_vfunc (gboolean include_internals, GtkCallback callback, gpointer callback_data)
|
|
{
|
|
for (Children::iterator w = children.begin(); w != children.end(); ++w) {
|
|
callback ((*w)->gobj(), callback_data);
|
|
}
|
|
|
|
if (include_internals) {
|
|
for (Dividers::iterator d = dividers.begin(); d != dividers.end(); ++d) {
|
|
callback (GTK_WIDGET((*d)->gobj()), callback_data);
|
|
}
|
|
}
|
|
}
|
|
|
|
Pane::Divider::Divider ()
|
|
: fract (0.0)
|
|
{
|
|
set_events (Gdk::EventMask (Gdk::BUTTON_PRESS|Gdk::BUTTON_RELEASE|Gdk::MOTION_NOTIFY));
|
|
}
|
|
|
|
bool
|
|
Pane::Divider::on_expose_event (GdkEventExpose* ev)
|
|
{
|
|
Widget::on_expose_event (ev);
|
|
|
|
Cairo::RefPtr<Cairo::Context> draw_context = get_window()->create_cairo_context ();
|
|
draw_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
|
|
draw_context->clip_preserve ();
|
|
draw_context->set_source_rgba (1.0, 0.0, 0.0, 0.6);
|
|
draw_context->fill ();
|
|
return true;
|
|
}
|