move event handling into basewidget again <FLINCH>

add the basewidget class

1 files changed, 301 insertions, 0 deletions

diff --git a/otk/basewidget.cc b/otk/basewidget.cc
new file mode 100644
index 00000000..242ccd98
--- /dev/null
+++ b/otk/basewidget.cc
@@ -0,0 +1,301 @@
+// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
+
+#ifdef    HAVE_CONFIG_H
+#  include "../config.h"
+#endif // HAVE_CONFIG_H
+
+#include "basewidget.hh"
+#include "display.hh"
+#include "assassin.hh"
+#include "screeninfo.hh"
+
+#include <algorithm>
+
+namespace otk {
+
+OtkBaseWidget::OtkBaseWidget(OtkBaseWidget *parent)
+  : OtkEventHandler(),
+    _dirty(false),
+    _parent(parent), _style(parent->getStyle()),
+    _cursor(parent->getCursor()), _bevel_width(parent->getBevelWidth()),
+    _ignore_config(0), _visible(false), _focused(false), _grabbed_mouse(false),
+    _grabbed_keyboard(false), _texture(0), _bg_pixmap(0), _bg_pixel(0),
+    _screen(parent->getScreen())
+{
+  assert(parent);
+  parent->addChild(this);
+  create();
+}
+
+OtkBaseWidget::OtkBaseWidget(Style *style, Cursor cursor, int bevel_width)
+  : OtkEventHandler(),
+    _dirty(false), _parent(0), _style(style), _cursor(cursor),
+    _bevel_width(bevel_width), _ignore_config(0), _visible(false),
+    _focused(false), _grabbed_mouse(false), _grabbed_keyboard(false),
+    _texture(0), _bg_pixmap(0), _bg_pixel(0), _screen(style->getScreen())
+{
+  assert(style);
+  create();
+}
+
+OtkBaseWidget::~OtkBaseWidget()
+{
+  if (_visible)
+    hide();
+
+  std::for_each(_children.begin(), _children.end(), PointerAssassin());
+
+  if (_parent)
+    _parent->removeChild(this);
+
+  XDestroyWindow(otk::OBDisplay::display, _window);
+}
+
+void OtkBaseWidget::create(void)
+{
+  const ScreenInfo *scr_info = otk::OBDisplay::screenInfo(_screen);
+  Window p_window = _parent ? _parent->getWindow() : scr_info->getRootWindow();
+
+  _rect.setRect(0, 0, 1, 1); // just some initial values
+
+  XSetWindowAttributes attrib_create;
+  unsigned long create_mask = CWBackPixmap | CWBorderPixel | CWEventMask;
+
+  attrib_create.background_pixmap = None;
+  attrib_create.colormap = scr_info->getColormap();
+  attrib_create.event_mask = ButtonPressMask | ButtonReleaseMask |
+    ButtonMotionMask | ExposureMask | StructureNotifyMask;
+
+  if (_cursor) {
+    create_mask |= CWCursor;
+    attrib_create.cursor = _cursor;
+  }
+
+  _window = XCreateWindow(otk::OBDisplay::display, p_window, _rect.x(),
+                          _rect.y(), _rect.width(), _rect.height(), 0,
+                          scr_info->getDepth(), InputOutput,
+                          scr_info->getVisual(), create_mask, &attrib_create);
+  _ignore_config++;
+}
+
+void OtkBaseWidget::setWidth(int w)
+{
+  assert(w > 0);
+  setGeometry(_rect.x(), _rect.y(), w, _rect.height());
+}
+
+void OtkBaseWidget::setHeight(int h)
+{
+  assert(h > 0);
+  setGeometry(_rect.x(), _rect.y(), _rect.width(), h);
+}
+
+void OtkBaseWidget::move(const Point &to)
+{
+  move(to.x(), to.y());
+}
+
+void OtkBaseWidget::move(int x, int y)
+{
+  _rect.setPos(x, y);
+  XMoveWindow(otk::OBDisplay::display, _window, x, y);
+  _ignore_config++;
+}
+
+void OtkBaseWidget::resize(const Point &to)
+{
+  resize(to.x(), to.y());
+}
+
+void OtkBaseWidget::resize(int w, int h)
+{
+  assert(w > 0 && h > 0);
+  setGeometry(_rect.x(), _rect.y(), w, h);
+}
+
+void OtkBaseWidget::setGeometry(const Rect &new_geom)
+{
+  setGeometry(new_geom.x(), new_geom.y(), new_geom.width(), new_geom.height());
+}
+ 
+void OtkBaseWidget::setGeometry(const Point &topleft, int width, int height)
+{
+  setGeometry(topleft.x(), topleft.y(), width, height);
+}
+
+void OtkBaseWidget::setGeometry(int x, int y, int width, int height)
+{
+  _rect = Rect(x, y, width, height);
+  _dirty = true;
+
+  XMoveResizeWindow(otk::OBDisplay::display, _window, x, y, width, height);
+  _ignore_config++;
+}
+
+void OtkBaseWidget::show(bool recursive)
+{
+  if (_visible)
+    return;
+
+  // make sure the internal state isn't mangled
+  if (_dirty)
+    update();
+
+  if (recursive) {
+    OtkBaseWidgetList::iterator it = _children.begin(), end = _children.end();
+    for (; it != end; ++it)
+      (*it)->show();
+  }
+
+  XMapWindow(otk::OBDisplay::display, _window);
+  _visible = true;
+}
+
+void OtkBaseWidget::hide(bool recursive)
+{
+  if (! _visible)
+    return;
+
+  if (recursive) {
+    OtkBaseWidgetList::iterator it = _children.begin(), end = _children.end();
+    for (; it != end; ++it)
+      (*it)->hide();
+  }
+  
+  XUnmapWindow(otk::OBDisplay::display, _window);
+  _visible = false;
+}
+
+void OtkBaseWidget::focus(void)
+{
+  if (! _visible)
+    return;
+
+  XSetInputFocus(otk::OBDisplay::display, _window, RevertToPointerRoot,
+                 CurrentTime);
+}
+
+bool OtkBaseWidget::grabMouse(void)
+{
+  Status ret = XGrabPointer(otk::OBDisplay::display, _window, True,
+                            (ButtonPressMask | ButtonReleaseMask |
+                             ButtonMotionMask | EnterWindowMask |
+                             LeaveWindowMask | PointerMotionMask),
+                            GrabModeSync, GrabModeAsync, None, None,
+                            CurrentTime);
+  _grabbed_mouse = (ret == GrabSuccess);
+  return _grabbed_mouse;
+}
+
+void OtkBaseWidget::ungrabMouse(void)
+{
+  if (! _grabbed_mouse)
+    return;
+
+  XUngrabPointer(otk::OBDisplay::display, CurrentTime);
+  _grabbed_mouse = false;
+}
+
+bool OtkBaseWidget::grabKeyboard(void)
+{
+  Status ret = XGrabKeyboard(otk::OBDisplay::display, _window, True,
+                             GrabModeSync, GrabModeAsync, CurrentTime);
+  _grabbed_keyboard = (ret == GrabSuccess);
+  return _grabbed_keyboard;
+
+}
+
+void OtkBaseWidget::ungrabKeyboard(void)
+{
+  if (! _grabbed_keyboard)
+    return;
+
+  XUngrabKeyboard(otk::OBDisplay::display, CurrentTime);
+  _grabbed_keyboard = false;
+}
+
+void OtkBaseWidget::render(void)
+{
+  if (!_texture) return;
+  
+  _bg_pixmap = _texture->render(_rect.width(), _rect.height(), _bg_pixmap);
+
+  if (_bg_pixmap)
+    XSetWindowBackgroundPixmap(otk::OBDisplay::display, _window, _bg_pixmap);
+  else {
+    unsigned int pix = _texture->color().pixel();
+    if (pix != _bg_pixel) {
+      _bg_pixel = pix;
+      XSetWindowBackground(otk::OBDisplay::display, _window, pix);
+    }
+  }
+}
+
+void OtkBaseWidget::update(void)
+{
+  if (_dirty) {
+    render();
+    XClearWindow(OBDisplay::display, _window);
+  }
+
+  OtkBaseWidgetList::iterator it = _children.begin(), end = _children.end();
+  for (; it != end; ++it)
+    (*it)->update();
+
+  _dirty = false;
+}
+
+void OtkBaseWidget::addChild(OtkBaseWidget *child, bool front)
+{
+  assert(child);
+  if (front)
+    _children.push_front(child);
+  else
+    _children.push_back(child);
+}
+
+void OtkBaseWidget::removeChild(OtkBaseWidget *child)
+{
+  assert(child);
+  OtkBaseWidgetList::iterator it, end = _children.end();
+  for (it = _children.begin(); it != end; ++it) {
+    if ((*it) == child)
+      break;
+  }
+
+  if (it != _children.end())
+    _children.erase(it);
+}
+
+void OtkBaseWidget::setStyle(Style *style)
+{
+  assert(style);
+  _style = style;
+  _dirty = true;
+  OtkBaseWidgetList::iterator it, end = _children.end();
+  for (it = _children.begin(); it != end; ++it)
+    (*it)->setStyle(style);
+}
+
+void OtkBaseWidget::exposeHandler(const XExposeEvent &e)
+{
+  OtkEventHandler::exposeHandler(e);
+  _dirty = true;
+  update();
+}
+
+void OtkBaseWidget::configureHandler(const XConfigureEvent &e)
+{
+  OtkEventHandler::configureHandler(e);
+  if (_ignore_config) {
+    _ignore_config--;
+  } else {
+    if (!(e.width == _rect.width() && e.height == _rect.height())) {
+      _dirty = true;
+      _rect.setSize(e.width, e.height);
+    }
+    update();
+  }
+}
+
+}