2 Copyright (C) 2016 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <gdkmm/cursor.h>
21 #include "gtkmm2ext/pane.h"
27 using namespace Gtkmm2ext;
39 set_has_window (false);
42 drag_cursor = Cursor (SB_H_DOUBLE_ARROW);
44 drag_cursor = Cursor (SB_V_DOUBLE_ARROW);
50 for (Children::iterator c = children.begin(); c != children.end(); ++c) {
56 Pane::set_child_minsize (Gtk::Widget const& w, int32_t minsize)
58 for (Children::iterator c = children.begin(); c != children.end(); ++c) {
67 Pane::set_drag_cursor (Gdk::Cursor c)
73 Pane::on_size_request (GtkRequisition* req)
75 GtkRequisition largest;
77 /* iterate over all children, get their size requests */
79 /* horizontal pane is as high as its tallest child, including the dividers.
80 * Its width is the sum of the children plus the dividers.
82 * vertical pane is as wide as its widest child, including the dividers.
83 * Its height is the sum of the children plus the dividers.
87 largest.width = (children.size() - 1) * divider_width;
90 largest.height = (children.size() - 1) * divider_width;
94 for (Children::iterator child = children.begin(); child != children.end(); ++child) {
97 child->w->size_request (r);
100 largest.height = max (largest.height, r.height);
101 largest.width += r.width;
103 largest.width = max (largest.width, r.width);
104 largest.height += r.height;
112 Pane::child_type_vfunc() const
114 /* We accept any number of any types of widgets */
115 return Gtk::Widget::get_type();
121 Divider* d = new Divider;
122 d->set_name (X_("Divider"));
123 d->signal_button_press_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_press_event), d), false);
124 d->signal_button_release_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_release_event), d), false);
125 d->signal_motion_notify_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_motion_event), d), false);
126 d->signal_enter_notify_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_enter_event), d), false);
127 d->signal_leave_notify_event().connect (sigc::bind (sigc::mem_fun (*this, &Pane::handle_leave_event), d), false);
128 d->set_parent (*this);
131 dividers.push_back (d);
135 Pane::handle_child_visibility ()
137 reallocate (get_allocation());
141 Pane::on_add (Widget* w)
143 children.push_back (Child (w, 0));
145 w->set_parent (*this);
147 w->signal_show().connect (sigc::mem_fun (*this, &Pane::handle_child_visibility));
148 w->signal_hide().connect (sigc::mem_fun (*this, &Pane::handle_child_visibility));
150 while (dividers.size() < (children.size() - 1)) {
156 Pane::on_remove (Widget* w)
158 for (Children::iterator c = children.begin(); c != children.end(); ++c) {
168 Pane::on_size_allocate (Gtk::Allocation& alloc)
170 std::cerr << "pane @ " << this << " reallocated as " << alloc.get_width() << " x " << alloc.get_height() << std::endl;
172 Container::on_size_allocate (alloc);
176 Pane::reallocate (Gtk::Allocation const & alloc)
179 int xpos = alloc.get_x();
180 int ypos = alloc.get_y();
183 if (children.empty()) {
187 if (children.size() == 1) {
188 /* only child gets the full allocation */
189 children.front().w->size_allocate (alloc);
194 remaining = alloc.get_width ();
196 remaining = alloc.get_height ();
199 Children::iterator child;
200 Children::iterator next;
201 Dividers::iterator div;
203 child = children.begin();
205 /* skip initial hidden children */
207 while (child != children.end()) {
208 if (child->w->is_visible()) {
214 for (div = dividers.begin(); child != children.end(); ) {
216 Gtk::Allocation child_alloc;
220 /* Move on to next *visible* child */
222 while (++next != children.end()) {
223 if (next->w->is_visible()) {
228 child_alloc.set_x (xpos);
229 child_alloc.set_y (ypos);
231 if (next == children.end()) {
232 /* last child gets all the remaining space */
235 /* child gets the fraction of the remaining space given by the divider that follows it */
236 fract = (*div)->fract;
240 child->w->size_request (cr);
243 child_alloc.set_width ((gint) floor (remaining * fract));
244 child_alloc.set_height (alloc.get_height());
245 remaining = max (0, (remaining - child_alloc.get_width()));
246 xpos += child_alloc.get_width();
248 child_alloc.set_width (alloc.get_width());
249 child_alloc.set_height ((gint) floor (remaining * fract));
250 remaining = max (0, (remaining - child_alloc.get_height()));
251 ypos += child_alloc.get_height ();
254 if (child->minsize) {
256 child_alloc.set_width (max (child_alloc.get_width(), child->minsize));
258 child_alloc.set_height (max (child_alloc.get_height(), child->minsize));
262 child->w->size_allocate (child_alloc);
264 if (next == children.end()) {
265 /* done, no more children, no need for a divider */
271 /* add a divider between children */
273 Gtk::Allocation divider_allocation;
275 divider_allocation.set_x (xpos);
276 divider_allocation.set_y (ypos);
279 divider_allocation.set_width (divider_width);
280 divider_allocation.set_height (alloc.get_height());
281 remaining = max (0, remaining - divider_width);
282 xpos += divider_width;
284 divider_allocation.set_width (alloc.get_width());
285 divider_allocation.set_height (divider_width);
286 remaining = max (0, remaining - divider_width);
287 ypos += divider_width;
290 (*div)->size_allocate (divider_allocation);
295 /* hide all remaining dividers */
297 while (div != dividers.end()) {
304 Pane::on_expose_event (GdkEventExpose* ev)
306 Children::iterator child;
307 Dividers::iterator div;
309 for (child = children.begin(), div = dividers.begin(); child != children.end(); ++child) {
311 if (child->w->is_visible()) {
312 propagate_expose (*(child->w), ev);
315 if (div != dividers.end()) {
316 if ((*div)->is_visible()) {
317 propagate_expose (**div, ev);
327 Pane::handle_press_event (GdkEventButton* ev, Divider* d)
336 Pane::handle_release_event (GdkEventButton* ev, Divider* d)
341 children.front().w->queue_resize ();
348 Pane::set_check_divider_position (bool yn)
354 Pane::fract_is_ok (Dividers::size_type div, float fract)
362 if (get_allocation().get_width() == 1 && get_allocation().get_height() == 1) {
363 /* space not * allocated - * divider being set from startup code. Let it pass,
364 since our goal is mostly to catch drags to a position that will interfere with window
370 /* On Quartz, if the pane handle (divider) gets to
371 be adjacent to the window edge, you can no longer grab it:
372 any attempt to do so is interpreted by the Quartz window
373 manager ("Finder") as a resize drag on the window edge.
377 if (div == dividers.size() - 1) {
378 if (get_allocation().get_width() * (1.0 - fract) < (divider_width*2)) {
379 /* too close to right edge */
385 if (get_allocation().get_width() * fract < (divider_width*2)) {
386 /* too close to left edge */
391 if (div == dividers.size() - 1) {
392 if (get_allocation().get_height() * (1.0 - fract) < (divider_width*2)) {
393 /* too close to bottom */
399 if (get_allocation().get_width() * fract < (divider_width*2)) {
400 /* too close to top */
410 Pane::handle_motion_event (GdkEventMotion* ev, Divider* d)
418 /* determine new position for handle */
423 d->translate_coordinates (*this, ev->x, ev->y, px, py);
425 Dividers::iterator prev = dividers.end();
426 Dividers::size_type div = 0;
428 for (Dividers::iterator di = dividers.begin(); di != dividers.end(); ++di, ++div) {
439 if (prev != dividers.end()) {
440 prev_edge = (*prev)->get_allocation().get_x() + (*prev)->get_allocation().get_width();
444 space_remaining = get_allocation().get_width() - prev_edge;
445 new_fract = (float) (px - prev_edge) / space_remaining;
447 if (prev != dividers.end()) {
448 prev_edge = (*prev)->get_allocation().get_y() + (*prev)->get_allocation().get_height();
452 space_remaining = get_allocation().get_height() - prev_edge;
453 new_fract = (float) (py - prev_edge) / space_remaining;
456 new_fract = min (1.0f, max (0.0f, new_fract));
458 if (!fract_is_ok (div, new_fract)) {
462 if (new_fract != d->fract) {
463 d->fract = new_fract;
464 reallocate (get_allocation ());
472 Pane::set_divider (Dividers::size_type div, float fract)
474 Dividers::iterator d = dividers.begin();
476 for (d = dividers.begin(); d != dividers.end() && div != 0; ++d, --div) {
480 if (d == dividers.end()) {
481 /* caller is trying to set divider that does not exist
487 fract = max (0.0f, min (1.0f, fract));
489 if (!fract_is_ok (div, fract)) {
493 if (fract != (*d)->fract) {
495 /* our size hasn't changed, but our internal allocations have */
496 reallocate (get_allocation());
502 Pane::get_divider (Dividers::size_type div)
504 Dividers::iterator d = dividers.begin();
506 for (d = dividers.begin(); d != dividers.end() && div != 0; ++d, --div) {
510 if (d == dividers.end()) {
511 /* caller is trying to set divider that does not exist
521 Pane::forall_vfunc (gboolean include_internals, GtkCallback callback, gpointer callback_data)
523 /* since the callback could modify the child list(s), make sure we keep
524 * the iterators safe;
527 for (Children::iterator c = children.begin(); c != children.end(); ) {
528 Children::iterator next = c;
530 callback (c->w->gobj(), callback_data);
534 if (include_internals) {
535 for (Dividers::iterator d = dividers.begin(); d != dividers.end(); ) {
536 Dividers::iterator next = d;
538 callback (GTK_WIDGET((*d)->gobj()), callback_data);
544 Pane::Divider::Divider ()
548 set_events (Gdk::EventMask (Gdk::BUTTON_PRESS|
556 Pane::Divider::on_expose_event (GdkEventExpose* ev)
558 Gdk::Color c = (dragging ? get_style()->get_fg (Gtk::STATE_ACTIVE) :
559 get_style()->get_fg (get_state()));
561 Cairo::RefPtr<Cairo::Context> draw_context = get_window()->create_cairo_context ();
562 draw_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
563 draw_context->clip_preserve ();
564 draw_context->set_source_rgba (c.get_red_p(), c.get_green_p(), c.get_blue_p(), 1.0);
565 draw_context->fill ();
571 Pane::handle_enter_event (GdkEventCrossing*, Divider* d)
573 d->get_window()->set_cursor (drag_cursor);
574 d->set_state (Gtk::STATE_SELECTED);
579 Pane::handle_leave_event (GdkEventCrossing*, Divider* d)
581 d->get_window()->set_cursor ();
582 d->set_state (Gtk::STATE_NORMAL);