HOOGE improvements. now widgets calculate their size according to the sizes of their children, they stretch stretchable elements to fit a maximum size, take into account bevel width, and much more

otk/widget.cc

@@ -4,6 +4,7 @@
 #include "screeninfo.hh"
 
 #include <algorithm>
+#include <iostream>
 
 namespace otk {
 
@@ -12,8 +13,9 @@ OtkWidget::OtkWidget(OtkWidget *parent, Direction direction)
     _cursor(parent->getCursor()), _bevel_width(parent->getBevelWidth()),
     _visible(false), _focused(false), _grabbed_mouse(false),
     _grabbed_keyboard(false), _stretchable_vert(false),
-    _stretchable_horz(false), _texture(0), _bg_pixmap(0),
+    _stretchable_horz(false), _texture(0), _bg_pixmap(0), _bg_pixel(0),
-    _screen(parent->getScreen())
+    _screen(parent->getScreen()), _fixed_width(false), _fixed_height(false),
+    _dirty(false)
 {
   parent->addChild(this);
   create();
@@ -25,7 +27,8 @@ OtkWidget::OtkWidget(Style *style, Direction direction,
     _bevel_width(bevel_width), _visible(false),
     _focused(false), _grabbed_mouse(false), _grabbed_keyboard(false),
     _stretchable_vert(false), _stretchable_horz(false), _texture(0),
-    _bg_pixmap(0), _screen(style->getScreen())
+    _bg_pixmap(0), _bg_pixel(0), _screen(style->getScreen()),
+    _fixed_width(false), _fixed_height(false), _dirty(false)
 {
   assert(style);
   create();
@@ -70,6 +73,20 @@ void OtkWidget::create(void)
                           scr_info->getVisual(), create_mask, &attrib_create);
 }
 
+void OtkWidget::setWidth(int w)
+{
+  assert(w > 0);
+  _fixed_width = true;  
+  setGeometry(_rect.x(), _rect.y(), w, _rect.height());
+}
+
+void OtkWidget::setHeight(int h)
+{
+  assert(h > 0);
+  _fixed_height = true;
+  setGeometry(_rect.x(), _rect.y(), _rect.width(), h);
+}
+
 void OtkWidget::move(const Point &to)
 {
   move(to.x(), to.y());
@@ -86,11 +103,11 @@ void OtkWidget::resize(const Point &to)
   resize(to.x(), to.y());
 }
 
-void OtkWidget::resize(int x, int y)
+void OtkWidget::resize(int w, int h)
 {
-  assert(x >= _rect.x() && y >= _rect.y());
+  assert(w > 0 && h > 0);
-
+  _fixed_width = _fixed_height = true;
-  setGeometry(_rect.x(), _rect.y(), x - _rect.x(), y - _rect.y());
+  setGeometry(_rect.x(), _rect.y(), w, h);
 }
 
 void OtkWidget::setGeometry(const Rect &new_geom)
@@ -106,12 +123,9 @@ void OtkWidget::setGeometry(const Point &topleft, int width, int height)
 void OtkWidget::setGeometry(int x, int y, int width, int height)
 {
   _rect = Rect(x, y, width, height);
-
+  _dirty = true;
-  fprintf(stderr, "Resizing to x: %d, y: %d, width: %d, height: %d\n",
-          x, y, width, height);
 
   XMoveResizeWindow(otk::OBDisplay::display, _window, x, y, width, height);
-  setTexture();
 }
 
 void OtkWidget::show(void)
@@ -119,14 +133,13 @@ void OtkWidget::show(void)
   if (_visible)
     return;
 
-  OtkWidgetList::iterator it = _children.begin(), end = _children.end();
+  // make sure the internal state isn't mangled
-  for (; it != end; ++it) {
+  if (_dirty)
-    fprintf(stderr, "showing child\n");
+    update();
-    (*it)->show();
-  }
 
-  fprintf(stderr, "x: %d, y: %d, width: %d, height: %d\n",
+  OtkWidgetList::iterator it = _children.begin(), end = _children.end();
-          _rect.x(), _rect.y(), _rect.width(), _rect.height());
+  for (; it != end; ++it)
+    (*it)->show();
 
   XMapWindow(otk::OBDisplay::display, _window);
   _visible = true;
@@ -193,22 +206,143 @@ void OtkWidget::ungrabKeyboard(void)
   _grabbed_keyboard = false;
 }
 
-void OtkWidget::setTexture(BTexture *texture)
+void OtkWidget::render(void)
 {
-  if (!texture && !_texture)
-    return;
-
   Pixmap old = _bg_pixmap;
 
-  if (texture)
-    _texture = texture;
-
   _bg_pixmap = _texture->render(_rect.width(), _rect.height(), _bg_pixmap);
 
-  if (_bg_pixmap != old)
+  if (_bg_pixmap && _bg_pixmap != old)
     XSetWindowBackgroundPixmap(otk::OBDisplay::display, _window, _bg_pixmap);
-  
+  else {
-  //XSetWindowBackground(otk::OBDisplay::display, win, pix);
+    unsigned int pix = _texture->color().pixel();
+    if (pix != _bg_pixel) {
+      _bg_pixel = pix;
+      XSetWindowBackground(otk::OBDisplay::display, _window, pix);
+    }
+  }
+}
+
+void OtkWidget::adjust(void)
+{
+  if (_direction == Horizontal)
+    adjustHorz();
+  else
+    adjustVert();
+}
+
+void OtkWidget::adjustHorz(void)
+{
+  if (_children.size() == 0)
+    return;
+
+  OtkWidget *tmp;
+  OtkWidgetList::iterator it, end = _children.end();
+
+  int tallest = 0;
+  int width = _bevel_width;
+  OtkWidgetList stretchable;
+
+  for (it = _children.begin(); it != end; ++it) {
+    tmp = *it;
+    if (tmp->isStretchableHorz() && _fixed_width)
+      stretchable.push_back(tmp);
+    else
+      width += tmp->_rect.width() + _bevel_width;
+
+    if (tmp->_rect.height() > tallest)
+      tallest = tmp->_rect.height();
+  }
+
+  if (stretchable.size() > 0) {
+    OtkWidgetList::iterator str_it = stretchable.begin(),
+      str_end = stretchable.end();
+
+    int str_width = _rect.width() - width / stretchable.size();
+
+    for (; str_it != str_end; ++str_it) {
+      (*str_it)->setWidth(str_width - _bevel_width);
+      (*str_it)->update();
+    }
+  }
+
+  OtkWidget *prev_widget = 0;
+
+  for (it = _children.begin(); it != end; ++it) {
+    tmp = *it;
+    int x, y;
+
+    if (prev_widget)
+      x = prev_widget->_rect.x() + prev_widget->_rect.width() + _bevel_width;
+    else
+      x = _rect.x() + _bevel_width;
+    y = (tallest - tmp->_rect.height()) / 2 + _bevel_width;
+
+    tmp->move(x, y);
+
+    prev_widget = tmp;
+  }
+
+  internalResize(width, tallest + _bevel_width * 2);
+}
+
+void OtkWidget::adjustVert(void)
+{
+  if (_children.size() == 0)
+    return;
+
+  OtkWidget *tmp;
+  OtkWidgetList::iterator it, end = _children.end();
+
+  int widest = 0;
+  int height = _bevel_width;
+  for (it = _children.begin(); it != end; ++it) {
+    tmp = *it;
+    if (tmp->_rect.width() > widest)
+      widest = tmp->_rect.width();
+    height += tmp->_rect.height() + _bevel_width;
+  }
+
+  OtkWidget *prev_widget = 0;
+
+  for (it = _children.begin(); it != end; ++it) {
+    tmp = *it;
+    int x, y;
+
+    if (prev_widget)
+      y = prev_widget->_rect.y() + prev_widget->_rect.height() + _bevel_width;
+    else
+      y = _rect.y() + _bevel_width;
+    x = (widest - tmp->_rect.width()) / 2 + _bevel_width;
+
+    tmp->move(x, y);
+
+    prev_widget = tmp;
+  }
+
+  internalResize(widest + _bevel_width * 2, height);
+}
+
+void OtkWidget::update(void)
+{
+  if (_dirty) {
+    adjust();
+    render();
+    XClearWindow(OBDisplay::display, _window);
+  }
+  _dirty = false;
+}
+
+void OtkWidget::internalResize(int w, int h)
+{
+  assert(w > 0 && h > 0);
+
+  if (! _fixed_width && ! _fixed_height)
+    resize(w, h);
+  else if (! _fixed_width)
+    resize(w, _rect.height());
+  else if (! _fixed_height)
+    resize(_rect.width(), h);
 }
 
 void OtkWidget::addChild(OtkWidget *child, bool front)
@@ -222,8 +356,9 @@ void OtkWidget::addChild(OtkWidget *child, bool front)
 
 void OtkWidget::removeChild(OtkWidget *child)
 {
+  assert(child);
   OtkWidgetList::iterator it, end = _children.end();
-  for (; it != end; ++it) {
+  for (it = _children.begin(); it != end; ++it) {
     if ((*it) == child)
       break;
   }

otk/widget.hh

@@ -1,3 +1,6 @@
+#ifndef __focus_hh
+#define __focus_hh
+
 #include <string>
 #include <list>
 
@@ -22,6 +25,8 @@ public:
 
   virtual ~OtkWidget();
 
+  void update(void);
+
   inline Window getWindow(void) const { return _window; }
   inline const OtkWidget *getParent(void) const { return _parent; }
   inline const OtkWidgetList &getChildren(void) const { return _children; }
@@ -31,6 +36,9 @@ public:
   void move(const Point &to);
   void move(int x, int y);
 
+  virtual void setWidth(int);
+  virtual void setHeight(int);
+
   virtual void resize(const Point &to);
   virtual void resize(int x, int y);
 
@@ -53,16 +61,17 @@ public:
   bool grabKeyboard(void);
   void ungrabKeyboard(void);
 
-  inline const BTexture *getTexture(void) const { return _texture; }
+  inline BTexture *getTexture(void) const { return _texture; }
-  virtual void setTexture(BTexture *texture = 0);
+  virtual void setTexture(BTexture *texture)
+  { _texture = texture; _dirty = true; }
 
   virtual void addChild(OtkWidget *child, bool front = false);
   virtual void removeChild(OtkWidget *child);
 
-  inline bool getStretchableHorz(void) const { return _stretchable_horz; }
+  inline bool isStretchableHorz(void) const { return _stretchable_horz; }
   void setStretchableHorz(bool s_horz) { _stretchable_horz = s_horz; }
 
-  inline bool getStretchableVert(void) const { return _stretchable_vert; }
+  inline bool isStretchableVert(void) const { return _stretchable_vert; }
   void setStretchableVert(bool s_vert)  { _stretchable_vert = s_vert; }
 
   inline Cursor getCursor(void) const { return _cursor; }
@@ -80,12 +89,17 @@ public:
 private:
 
   void create(void);
+  void adjust(void);
+  void adjustHorz(void);
+  void adjustVert(void);
+  void internalResize(int width, int height);
+  void render(void);
 
   Window _window;
 
   OtkWidget *_parent;
   OtkWidgetList _children;
- 
+
   Style *_style;
   Direction _direction;
   Cursor _cursor;
@@ -102,9 +116,17 @@ private:
 
   BTexture *_texture;
   Pixmap _bg_pixmap;
+  unsigned int _bg_pixel;
 
   Rect _rect;
   unsigned int _screen;
+
+  bool _fixed_width;
+  bool _fixed_height;
+
+  bool _dirty;
 };
 
 }
+
+#endif // __widget_hh