Ichthyostega
d964e98601
it is a widely accepted rule to shape names with the usage site in mind. Especially this means, that we use the singular form for all kinds of collections and assortments. Thus, the namespace should be called "widget" not "widgets", because at usage site this becomes gui::widget::TimelineWidget Likewise for "dialogs" and "pannels"
329 lines
7.9 KiB
C++
329 lines
7.9 KiB
C++
/*
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header widget
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Copyright (C) Lumiera.org
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2008, Joel Holdsworth <joel@airwebreathe.org.uk>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "gui/widgets/timeline-widget.hpp"
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#include "gui/util/rectangle.hpp"
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#include <boost/foreach.hpp>
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using namespace Gtk;
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using namespace std;
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using namespace util;
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using std::shared_ptr;
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namespace gui {
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namespace widgets {
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namespace timeline {
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TimelineHeaderWidget::TimelineHeaderWidget(
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timeline::Track &timeline_track) :
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Glib::ObjectBase("TimelineHeaderWidget"),
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track(timeline_track),
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widget(NULL),
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hoveringExpander(false),
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clickedExpander(false),
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margin(-1),
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expand_button_size(12)
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{
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set_has_window(false);
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set_redraw_on_allocate(false);
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// Install style properties
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register_styles();
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// Load the styles up
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read_styles();
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}
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void
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TimelineHeaderWidget::on_realize()
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{
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set_has_window(false);
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Container::on_realize();
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// Create the GdkWindow:
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GdkWindowAttr attributes;
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memset(&attributes, 0, sizeof(attributes));
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Allocation allocation = get_allocation();
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// Set initial position and size of the Gdk::Window:
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attributes.x = allocation.get_x();
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attributes.y = allocation.get_y();
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attributes.width = allocation.get_width();
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attributes.height = allocation.get_height();
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attributes.event_mask = get_events () |
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Gdk::EXPOSURE_MASK |
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Gdk::POINTER_MOTION_MASK |
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Gdk::BUTTON_PRESS_MASK |
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Gdk::BUTTON_RELEASE_MASK;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.wclass = GDK_INPUT_OUTPUT;
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gdkWindow = Gdk::Window::create(get_window(), &attributes,
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GDK_WA_X | GDK_WA_Y);
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set_has_window(true);
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set_window(gdkWindow);
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// Unset the background so as to make the colour match the parent
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// window
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//unset_bg(STATE_NORMAL);
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// Make the widget receive expose events
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gdkWindow->set_user_data(gobj());
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}
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void
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TimelineHeaderWidget::on_unrealize()
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{
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// Un-reference any window we may have created
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gdkWindow.clear();
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// Call base class:
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Container::on_unrealize();
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}
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void
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TimelineHeaderWidget::set_child_widget(Widget& child)
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{
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widget = &child;
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widget->set_parent(*this);
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}
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void
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TimelineHeaderWidget::on_size_request(Requisition* requisition)
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{
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REQUIRE(requisition);
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Requisition child_requisition = {0, 0};
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#if 0
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if(widget && widget->get_visible())
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child_requisition = widget->size_request();
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#endif
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requisition->width = child_requisition.width,
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requisition->height = child_requisition.height;
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ENSURE(requisition->width >= 0);
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ENSURE(requisition->height >= 0);
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}
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void
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TimelineHeaderWidget::on_size_allocate(Gtk::Allocation& allocation)
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{
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//Use the offered allocation for this container:
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set_allocation(allocation);
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// Resize the widget's window
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if(gdkWindow)
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{
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gdkWindow->move_resize(allocation.get_x(), allocation.get_y(),
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allocation.get_width(), allocation.get_height());
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}
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//Assign sign space to the child:
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Gtk::Allocation child_allocation(
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margin + expand_button_size,
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margin,
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max(allocation.get_width() - expand_button_size - margin * 2, 0),
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allocation.get_height() - margin*2);
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if(widget && widget->get_visible())
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widget->size_allocate(child_allocation);
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}
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bool
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TimelineHeaderWidget::on_expose_event(GdkEventExpose *event)
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{
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#if 0
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Glib::RefPtr<Style> style = get_style();
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REQUIRE(style);
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REQUIRE(gdkWindow);
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shared_ptr<model::Track> modelTrack = track.getModelTrack();
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REQUIRE(modelTrack);
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// Get the header box
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const Gdk::Rectangle allocation = get_allocation();
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const Gdk::Rectangle box(0, 0,
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allocation.get_width(), allocation.get_height());
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// Use paint_box to draw a themed bevel around the header
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style->paint_box(gdkWindow, STATE_NORMAL,
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SHADOW_OUT, box, *this, "",
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box.get_x(), box.get_y(),
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box.get_width(), box.get_height());
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// Paint the expander if there are child tracks
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StateType state_type = STATE_NORMAL;
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if(clickedExpander)
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state_type = STATE_SELECTED;
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else if(hoveringExpander)
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state_type = STATE_PRELIGHT;
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if(!modelTrack->get_child_tracks().empty())
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style->paint_expander (gdkWindow,
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state_type,
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box, *this, "",
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box.get_x() + expand_button_size / 2 + margin,
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box.get_y() + box.get_height() / 2,
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track.get_expander_style());
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#endif
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return true; //Container::on_expose_event(event);
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}
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bool
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TimelineHeaderWidget::on_button_press_event (GdkEventButton* event)
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{
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clickedExpander = hoveringExpander;
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return Container::on_button_press_event(event);
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}
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bool
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TimelineHeaderWidget::on_button_release_event (GdkEventButton* event)
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{
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TimelineLayoutHelper &layout = track.timelineWidget.layoutHelper;
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// Did the user release the button on an expander?
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if(clickedExpander && !layout.is_dragging_track())
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{
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// Yes? The toggle the expanding
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track.expand_collapse(track.get_expanded() ?
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Track::Collapse : Track::Expand);
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clickedExpander = false;
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layout.update_layout();
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}
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return Container::on_button_release_event(event);
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}
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bool
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TimelineHeaderWidget::on_motion_notify_event (GdkEventMotion* event)
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{
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bool hovering = false;
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const Gdk::Rectangle box = get_allocation();
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if(util::pt_in_rect(Gdk::Point(event->x, event->y),
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Gdk::Rectangle(margin, margin,
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expand_button_size, box.get_height() - margin * 2)))
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hovering = true;
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if(hovering != hoveringExpander)
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{
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hoveringExpander = hovering;
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queue_draw();
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}
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return Container::on_motion_notify_event(event);
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}
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void
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TimelineHeaderWidget::forall_vfunc(gboolean /* include_internals */,
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GtkCallback callback, gpointer callback_data)
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{
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if(widget)
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callback(widget->gobj(), callback_data);
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}
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void
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TimelineHeaderWidget::on_add(Gtk::Widget* child)
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{
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REQUIRE(child);
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if(!widget)
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{
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widget = child;
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widget->set_parent(*this);
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}
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}
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void
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TimelineHeaderWidget::on_remove(Gtk::Widget* child)
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{
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REQUIRE(child);
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if(child)
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{
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const bool visible = child->get_visible();
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if(child == widget)
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{
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widget = NULL;
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child->unparent();
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if(visible)
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queue_resize();
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}
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}
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}
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GType
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TimelineHeaderWidget::child_type_vfunc() const
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{
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// If there is still space for one widget, then report the type of
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// widget that may be added.
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if(!widget)
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return Gtk::Widget::get_type();
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else
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{
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//No more widgets may be added.
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return G_TYPE_NONE;
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}
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}
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void
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TimelineHeaderWidget::register_styles() const
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{
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static bool registered = false;
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if(registered) return;
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registered = true;
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GtkWidgetClass *klass = GTK_WIDGET_CLASS(G_OBJECT_GET_CLASS(gobj()));
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gtk_widget_class_install_style_property(klass,
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g_param_spec_int("margin",
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"Heading Margin",
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"The amount of padding around each header pixels.",
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0, G_MAXINT, 4, G_PARAM_READABLE));
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gtk_widget_class_install_style_property(klass,
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g_param_spec_int("expand_button_size",
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"Expand Button Size",
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"The width of the expander button in pixels.",
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0, G_MAXINT, 12, G_PARAM_READABLE));
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}
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void
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TimelineHeaderWidget::read_styles()
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{
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get_style_property("margin", margin);
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get_style_property("expand_button_size", expand_button_size);
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}
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} // namespace timeline
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} // namespace widgets
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} // namespace gui
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