added widgets module
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maroy
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306
livesupport/modules/widgets/src/ImageButton.cxx
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306
livesupport/modules/widgets/src/ImageButton.cxx
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/*------------------------------------------------------------------------------
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Copyright (c) 2004 Media Development Loan Fund
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This file is part of the LiveSupport project.
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http://livesupport.campware.org/
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To report bugs, send an e-mail to bugs@campware.org
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LiveSupport is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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LiveSupport 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 LiveSupport; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Author : $Author: maroy $
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Version : $Revision: 1.1 $
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Location : $Source: /home/paul/cvs2svn-livesupport/newcvsrepo/livesupport/modules/widgets/src/ImageButton.cxx,v $
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------------------------------------------------------------------------------*/
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/* ============================================================ include files */
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#ifdef HAVE_CONFIG_H
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#include "configure.h"
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#endif
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#include "LiveSupport/Widgets/ImageButton.h"
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using namespace LiveSupport::Widgets;
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/* =================================================== local data structures */
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/* ================================================ local constants & macros */
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/* =============================================== local function prototypes */
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/* ============================================================= module code */
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/*------------------------------------------------------------------------------
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* Constructor.
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*----------------------------------------------------------------------------*/
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ImageButton :: ImageButton(Glib::RefPtr<Gdk::Pixbuf> image)
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throw ()
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{
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set_flags(Gtk::NO_WINDOW);
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state = passiveState;
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this->passiveImage = image;
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this->rollImage.clear();
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}
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/*------------------------------------------------------------------------------
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* Constructor.
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*----------------------------------------------------------------------------*/
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ImageButton :: ImageButton(Glib::RefPtr<Gdk::Pixbuf> passiveImage,
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Glib::RefPtr<Gdk::Pixbuf> rollImage)
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throw ()
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{
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set_flags(Gtk::NO_WINDOW);
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state = passiveState;
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this->passiveImage = passiveImage;
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this->rollImage = rollImage;
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}
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/*------------------------------------------------------------------------------
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* Destructor.
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*----------------------------------------------------------------------------*/
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ImageButton :: ~ImageButton(void) throw ()
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{
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}
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/*------------------------------------------------------------------------------
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* Handle the size request event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_size_request(Gtk::Requisition* requisition) throw ()
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{
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*requisition = Gtk::Requisition();
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requisition->width = passiveImage->get_width();
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requisition->height = passiveImage->get_height();
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}
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/*------------------------------------------------------------------------------
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* Handle the size allocate event.
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* We will not be given heights or widths less than we have requested,
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* though we might get more.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_size_allocate(Gtk::Allocation& allocation) throw ()
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{
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set_allocation(allocation);
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if (gdkWindow) {
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gdkWindow->move_resize( allocation.get_x(),
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allocation.get_y(),
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allocation.get_width(),
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allocation.get_height() );
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}
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}
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/*------------------------------------------------------------------------------
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* Execute a function on all the children.
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* As this widget has no children, don't do anything.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: forall_vfunc(gboolean includeInternals,
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GtkCallback callback,
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gpointer callbackData) throw ()
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{
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}
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/*------------------------------------------------------------------------------
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* Handle the add child widget event.
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* As this widget has no children, don't do anything.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_add(Gtk::Widget* child) throw ()
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{
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}
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/*------------------------------------------------------------------------------
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* Handle the remove child widget event.
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* As this widget has no children, don't do anything.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_remove(Gtk::Widget* child) throw ()
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{
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}
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/*------------------------------------------------------------------------------
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* Return what kind of widgets can be added to this container.
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* As this widget has no children, return G_TYPE_NONE always.
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*----------------------------------------------------------------------------*/
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GtkType
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ImageButton :: child_type_vfunc() const throw ()
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{
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return G_TYPE_NONE;
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}
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/*------------------------------------------------------------------------------
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* Handle the map event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_map() throw ()
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{
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Gtk::Button::on_map();
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}
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/*------------------------------------------------------------------------------
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* Handle the unmap event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_unmap() throw ()
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{
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Gtk::Button::on_unmap();
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}
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/*------------------------------------------------------------------------------
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* Handle the realize event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_realize() throw ()
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{
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Gtk::Button::on_realize();
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if (!gdkWindow) {
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// create the Gdk::Window, if it didn't exist before
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GdkWindowAttr attributes;
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memset(&attributes, 0, sizeof(attributes));
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Gtk::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 () | Gdk::EXPOSURE_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(),
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&attributes,
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GDK_WA_X | GDK_WA_Y);
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unset_flags(Gtk::NO_WINDOW);
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set_window(gdkWindow);
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// make the widget receive expose events
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gdkWindow->set_user_data(gobj());
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// allocate a GC for use in on_expose_event()
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gc = Gdk::GC::create(gdkWindow);
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}
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}
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/*------------------------------------------------------------------------------
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* Handle the unrealize event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_unrealize() throw ()
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{
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gdkWindow.clear();
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gc.clear();
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Gtk::Button::on_unrealize();
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}
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/*------------------------------------------------------------------------------
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* Handle the expose event.
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*----------------------------------------------------------------------------*/
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bool
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ImageButton :: on_expose_event(GdkEventExpose* event) throw ()
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{
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if (event->count > 0) {
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return false;
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}
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if (gdkWindow) {
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gdkWindow->clear();
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Glib::RefPtr<Gdk::Pixbuf> image;
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switch (state) {
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case passiveState:
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default:
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image = passiveImage;
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break;
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case rollState:
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image = rollImage ? rollImage : passiveImage;
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break;
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}
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// just draw the button image at the centre of the available space
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int x = (get_width() - image->get_width()) / 2;
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int y = (get_height() - image->get_height()) / 2;
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image->render_to_drawable(gdkWindow,
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get_style()->get_black_gc(),
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0, 0,
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x,
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y,
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image->get_width(),
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image->get_height(),
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Gdk::RGB_DITHER_NONE,
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0, 0);
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}
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return false;
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}
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/*------------------------------------------------------------------------------
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* Handle the mouse enter event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_enter(void) throw ()
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{
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state = rollState;
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Gtk::Button::on_enter();
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}
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/*------------------------------------------------------------------------------
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* Handle the mouse leave event.
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*----------------------------------------------------------------------------*/
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void
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ImageButton :: on_leave(void) throw ()
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{
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state = passiveState;
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Gtk::Button::on_leave();
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}
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