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)
171 Container::on_size_allocate (alloc);
175 Pane::reallocate (Gtk::Allocation const & alloc)
178 int xpos = alloc.get_x();
179 int ypos = alloc.get_y();
182 if (children.empty()) {
186 if (children.size() == 1) {
187 /* only child gets the full allocation */
188 children.front().w->size_allocate (alloc);
193 remaining = alloc.get_width ();
195 remaining = alloc.get_height ();
198 Children::iterator child;
199 Children::iterator next;
200 Dividers::iterator div;
202 child = children.begin();
204 /* skip initial hidden children */
206 while (child != children.end()) {
207 if (child->w->is_visible()) {
213 for (div = dividers.begin(); child != children.end(); ) {
215 Gtk::Allocation child_alloc;
219 /* Move on to next *visible* child */
221 while (++next != children.end()) {
222 if (next->w->is_visible()) {
227 child_alloc.set_x (xpos);
228 child_alloc.set_y (ypos);
230 if (next == children.end()) {
231 /* last child gets all the remaining space */
234 /* child gets the fraction of the remaining space given by the divider that follows it */
235 fract = (*div)->fract;
239 child->w->size_request (cr);
242 child_alloc.set_width ((gint) floor (remaining * fract));
243 child_alloc.set_height (alloc.get_height());
244 remaining = max (0, (remaining - child_alloc.get_width()));
245 xpos += child_alloc.get_width();
247 child_alloc.set_width (alloc.get_width());
248 child_alloc.set_height ((gint) floor (remaining * fract));
249 remaining = max (0, (remaining - child_alloc.get_height()));
250 ypos += child_alloc.get_height ();
253 if (child->minsize) {
255 child_alloc.set_width (max (child_alloc.get_width(), child->minsize));
257 child_alloc.set_height (max (child_alloc.get_height(), child->minsize));
261 child->w->size_allocate (child_alloc);
263 if (next == children.end()) {
264 /* done, no more children, no need for a divider */
270 /* add a divider between children */
272 Gtk::Allocation divider_allocation;
274 divider_allocation.set_x (xpos);
275 divider_allocation.set_y (ypos);
278 divider_allocation.set_width (divider_width);
279 divider_allocation.set_height (alloc.get_height());
280 remaining = max (0, remaining - divider_width);
281 xpos += divider_width;
283 divider_allocation.set_width (alloc.get_width());
284 divider_allocation.set_height (divider_width);
285 remaining = max (0, remaining - divider_width);
286 ypos += divider_width;
289 (*div)->size_allocate (divider_allocation);
294 /* hide all remaining dividers */
296 while (div != dividers.end()) {
303 Pane::on_expose_event (GdkEventExpose* ev)
305 Children::iterator child;
306 Dividers::iterator div;
308 for (child = children.begin(), div = dividers.begin(); child != children.end(); ++child) {
310 if (child->w->is_visible()) {
311 propagate_expose (*(child->w), ev);
314 if (div != dividers.end()) {
315 if ((*div)->is_visible()) {
316 propagate_expose (**div, ev);
326 Pane::handle_press_event (GdkEventButton* ev, Divider* d)
335 Pane::handle_release_event (GdkEventButton* ev, Divider* d)
340 children.front().w->queue_resize ();
347 Pane::set_check_divider_position (bool yn)
353 Pane::fract_is_ok (Dividers::size_type div, float fract)
360 /* On Quartz, if the pane handle (divider) gets to
361 be adjacent to the window edge, you can no longer grab it:
362 any attempt to do so is interpreted by the Quartz window
363 manager ("Finder") as a resize drag on the window edge.
367 if (div == dividers.size() - 1) {
368 if (get_allocation().get_width() * (1.0 - fract) < (divider_width*2)) {
369 /* too close to right edge */
375 if (get_allocation().get_width() * fract < (divider_width*2)) {
376 /* too close to left edge */
381 if (div == dividers.size() - 1) {
382 if (get_allocation().get_height() * (1.0 - fract) < (divider_width*2)) {
383 /* too close to bottom */
389 if (get_allocation().get_width() * fract < (divider_width*2)) {
390 /* too close to top */
400 Pane::handle_motion_event (GdkEventMotion* ev, Divider* d)
408 /* determine new position for handle */
413 d->translate_coordinates (*this, ev->x, ev->y, px, py);
415 Dividers::iterator prev = dividers.end();
416 Dividers::size_type div = 0;
418 for (Dividers::iterator di = dividers.begin(); di != dividers.end(); ++di, ++div) {
429 if (prev != dividers.end()) {
430 prev_edge = (*prev)->get_allocation().get_x() + (*prev)->get_allocation().get_width();
434 space_remaining = get_allocation().get_width() - prev_edge;
435 new_fract = (float) (px - prev_edge) / space_remaining;
437 if (prev != dividers.end()) {
438 prev_edge = (*prev)->get_allocation().get_y() + (*prev)->get_allocation().get_height();
442 space_remaining = get_allocation().get_height() - prev_edge;
443 new_fract = (float) (py - prev_edge) / space_remaining;
446 new_fract = min (1.0f, max (0.0f, new_fract));
448 if (!fract_is_ok (div, new_fract)) {
452 if (new_fract != d->fract) {
453 d->fract = new_fract;
454 reallocate (get_allocation ());
462 Pane::set_divider (Dividers::size_type div, float fract)
464 Dividers::iterator d = dividers.begin();
466 for (d = dividers.begin(); d != dividers.end() && div != 0; ++d, --div) {
470 if (d == dividers.end()) {
471 /* caller is trying to set divider that does not exist
477 fract = max (0.0f, min (1.0f, fract));
479 if (!fract_is_ok (div, fract)) {
483 if (fract != (*d)->fract) {
485 /* our size hasn't changed, but our internal allocations have */
486 reallocate (get_allocation());
492 Pane::get_divider (Dividers::size_type div)
494 Dividers::iterator d = dividers.begin();
496 for (d = dividers.begin(); d != dividers.end() && div != 0; ++d, --div) {
500 if (d == dividers.end()) {
501 /* caller is trying to set divider that does not exist
511 Pane::forall_vfunc (gboolean include_internals, GtkCallback callback, gpointer callback_data)
513 /* since the callback could modify the child list(s), make sure we keep
514 * the iterators safe;
517 for (Children::iterator c = children.begin(); c != children.end(); ) {
518 Children::iterator next = c;
520 callback (c->w->gobj(), callback_data);
524 if (include_internals) {
525 for (Dividers::iterator d = dividers.begin(); d != dividers.end(); ) {
526 Dividers::iterator next = d;
528 callback (GTK_WIDGET((*d)->gobj()), callback_data);
534 Pane::Divider::Divider ()
538 set_events (Gdk::EventMask (Gdk::BUTTON_PRESS|
546 Pane::Divider::on_expose_event (GdkEventExpose* ev)
548 Gdk::Color c = (dragging ? get_style()->get_fg (Gtk::STATE_ACTIVE) :
549 get_style()->get_fg (get_state()));
551 Cairo::RefPtr<Cairo::Context> draw_context = get_window()->create_cairo_context ();
552 draw_context->rectangle (ev->area.x, ev->area.y, ev->area.width, ev->area.height);
553 draw_context->clip_preserve ();
554 draw_context->set_source_rgba (c.get_red_p(), c.get_green_p(), c.get_blue_p(), 1.0);
555 draw_context->fill ();
561 Pane::handle_enter_event (GdkEventCrossing*, Divider* d)
563 d->get_window()->set_cursor (drag_cursor);
564 d->set_state (Gtk::STATE_SELECTED);
569 Pane::handle_leave_event (GdkEventCrossing*, Divider* d)
571 d->get_window()->set_cursor ();
572 d->set_state (Gtk::STATE_NORMAL);