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(svn r16190) -Codechange: Allow stacking of nested widgets.

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This commit is contained in:
alberth 2009-04-30 19:21:51 +00:00
parent db91f735a8
commit a9557c633a
2 changed files with 132 additions and 16 deletions
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102
src/widget.cpp
View File

@ -669,6 +669,7 @@ void Window::DrawSortButtonState(int widget, SortButtonState state) const
* never swap order.
* - #NWidgetVertical for organizing child widgets underneath each other.
* - #NWidgetBackground for adding a background behind its child widget.
* - #NWidgetStacked for stacking child widgets on top of each other.
*
* @see NestedWidgetParts
*/
@ -895,6 +896,86 @@ void NWidgetContainer::Add(NWidgetBase *wid)
}
}
/**
* Widgets stacked on top of each other.
* @param tp Kind of stacking, must be either #NWID_SELECTION or #NWID_LAYERED.
*/
NWidgetStacked::NWidgetStacked(WidgetType tp) : NWidgetContainer(tp)
{
}
int NWidgetStacked::ComputeMinimalSize()
{
/* First sweep, recurse down and compute minimal size and filling. */
int biggest_index = -1;
this->min_x = 0;
this->min_y = 0;
this->fill_x = (this->head != NULL);
this->fill_y = (this->head != NULL);
this->resize_x = (this->head != NULL) ? 1 : 0;
this->resize_y = (this->head != NULL) ? 1 : 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
int idx = child_wid->ComputeMinimalSize();
biggest_index = max(biggest_index, idx);
this->min_x = max(this->min_x, child_wid->min_x + child_wid->padding_left + child_wid->padding_right);
this->min_y = max(this->min_y, child_wid->min_y + child_wid->padding_top + child_wid->padding_bottom);
this->fill_x &= child_wid->fill_x;
this->fill_y &= child_wid->fill_y;
this->resize_x = LeastCommonMultiple(this->resize_x, child_wid->resize_x);
this->resize_y = LeastCommonMultiple(this->resize_y, child_wid->resize_y);
}
return biggest_index;
}
void NWidgetStacked::AssignMinimalPosition(uint x, uint y, uint given_width, uint given_height, bool allow_resize_x, bool allow_resize_y, bool rtl)
{
assert(given_width >= this->min_x && given_height >= this->min_y);
this->pos_x = x;
this->pos_y = y;
this->min_x = given_width;
this->min_y = given_height;
if (!allow_resize_x) this->resize_x = 0;
if (!allow_resize_y) this->resize_y = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
/* Decide about horizontal position and filling of the child. */
uint child_width;
int child_pos_x;
if (child_wid->fill_x) {
child_width = given_width - child_wid->padding_left - child_wid->padding_right;
child_pos_x = (rtl ? child_wid->padding_right : child_wid->padding_left);
} else {
child_width = child_wid->min_x;
child_pos_x = (given_width - child_wid->padding_left - child_wid->padding_right - child_width) / 2 + (rtl ? child_wid->padding_right : child_wid->padding_left);
}
/* Decide about vertical position and filling of the child. */
uint child_height;
int child_pos_y;
if (child_wid->fill_y) {
child_height = given_height - child_wid->padding_top - child_wid->padding_bottom;
child_pos_y = 0;
} else {
child_height = child_wid->min_y;
child_pos_y = (given_height - child_wid->padding_top - child_wid->padding_bottom - child_height) / 2;
}
child_wid->AssignMinimalPosition(x + child_pos_x, y + child_pos_y, child_width, child_height, (this->resize_x > 0), (this->resize_y > 0), rtl);
}
}
void NWidgetStacked::StoreWidgets(Widget *widgets, int length, bool left_moving, bool top_moving, bool rtl)
{
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
child_wid->StoreWidgets(widgets, length, left_moving, top_moving, rtl);
}
}
NWidgetPIPContainer::NWidgetPIPContainer(WidgetType tp) : NWidgetContainer(tp)
{
}
/**
* Set additional pre/inter/post space for the container.
*
@ -904,7 +985,7 @@ void NWidgetContainer::Add(NWidgetBase *wid)
* @param pip_post Additional space after the last child widget (below for the
* vertical container, at the right for the horizontal container).
*/
void NWidgetContainer::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
void NWidgetPIPContainer::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
{
this->pip_pre = pip_pre;
this->pip_inter = pip_inter;
@ -912,7 +993,7 @@ void NWidgetContainer::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
}
/** Horizontal container widget. */
NWidgetHorizontal::NWidgetHorizontal() : NWidgetContainer(NWID_HORIZONTAL)
NWidgetHorizontal::NWidgetHorizontal() : NWidgetPIPContainer(NWID_HORIZONTAL)
{
}
@ -1037,7 +1118,7 @@ void NWidgetHorizontalLTR::StoreWidgets(Widget *widgets, int length, bool left_m
}
/** Vertical container widget. */
NWidgetVertical::NWidgetVertical() : NWidgetContainer(NWID_VERTICAL)
NWidgetVertical::NWidgetVertical() : NWidgetPIPContainer(NWID_VERTICAL)
{
}
@ -1169,7 +1250,7 @@ void NWidgetSpacer::StoreWidgets(Widget *widgets, int length, bool left_moving,
* vertical container will be inserted while adding the first
* child widget.
*/
NWidgetBackground::NWidgetBackground(WidgetType tp, Colours colour, int index, NWidgetContainer *child) : NWidgetCore(tp, colour, true, true, 0x0, STR_NULL)
NWidgetBackground::NWidgetBackground(WidgetType tp, Colours colour, int index, NWidgetPIPContainer *child) : NWidgetCore(tp, colour, true, true, 0x0, STR_NULL)
{
this->SetIndex(index);
assert(tp == WWT_PANEL || tp == WWT_INSET || tp == WWT_FRAME);
@ -1487,6 +1568,14 @@ static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest,
*fill_dest = false;
break;
case NWID_SELECTION:
case NWID_LAYERED:
if (*dest != NULL) return num_used;
*dest = new NWidgetStacked(parts->type);
*fill_dest = true;
break;
case WPT_RESIZE: {
NWidgetResizeBase *nwrb = dynamic_cast<NWidgetResizeBase *>(*dest);
if (nwrb != NULL) {
@ -1559,7 +1648,7 @@ static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest,
}
case WPT_PIPSPACE: {
NWidgetContainer *nwc = dynamic_cast<NWidgetContainer *>(*dest);
NWidgetPIPContainer *nwc = dynamic_cast<NWidgetPIPContainer *>(*dest);
if (nwc != NULL) nwc->SetPIP(parts->u.pip.pre, parts->u.pip.inter, parts->u.pip.post);
NWidgetBackground *nwb = dynamic_cast<NWidgetBackground *>(*dest);
@ -1614,7 +1703,8 @@ static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase *pare
/* If sub-widget is a container, recursively fill that container. */
WidgetType tp = sub_widget->type;
if (fill_sub && (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL || tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET)) {
if (fill_sub && (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL
|| tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET || tp == NWID_SELECTION || tp == NWID_LAYERED)) {
int num_used = MakeWidgetTree(parts, count - total_used, sub_widget);
parts += num_used;
total_used += num_used;

46
src/widget_type.h
View File

@ -100,6 +100,8 @@ enum WidgetType {
NWID_HORIZONTAL_LTR, ///< Horizontal container that doesn't change the order of the widgets for RTL languages.
NWID_VERTICAL, ///< Vertical container.
NWID_SPACER, ///< Invisible widget that takes some space.
NWID_SELECTION, ///< Stacked widgets, only one visible at a time (eg in a panel with tabs).
NWID_LAYERED, ///< Widgets layered on top of each other, all visible at the same time.
/* Nested widget part types. */
WPT_RESIZE, ///< Widget part for specifying resizing.
@ -214,23 +216,43 @@ public:
~NWidgetContainer();
void Add(NWidgetBase *wid);
void SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post);
/** Return whether the container is empty. */
inline bool IsEmpty() { return head == NULL; };
protected:
uint8 pip_pre; ///< Amount of space before first widget.
uint8 pip_inter; ///< Amount of space between widgets.
uint8 pip_post; ///< Amount of space after last widget.
NWidgetBase *head; ///< Pointer to first widget in container.
NWidgetBase *tail; ///< Pointer to last widget in container.
};
/** Stacked widgets, widgets all occupying the same space in the window.
* @note the semantics difference between #NWID_SELECTION and #NWID_LAYERED is currently not used.
*/
class NWidgetStacked : public NWidgetContainer {
public:
NWidgetStacked(WidgetType tp);
int ComputeMinimalSize();
void AssignMinimalPosition(uint x, uint y, uint given_width, uint given_height, bool allow_resize_x, bool allow_resize_y, bool rtl);
void StoreWidgets(Widget *widgets, int length, bool left_moving, bool top_moving, bool rtl);
};
/** Container with pre/inter/post child space. */
class NWidgetPIPContainer : public NWidgetContainer {
public:
NWidgetPIPContainer(WidgetType tp);
void SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post);
protected:
uint8 pip_pre; ///< Amount of space before first widget.
uint8 pip_inter; ///< Amount of space between widgets.
uint8 pip_post; ///< Amount of space after last widget.
};
/** Horizontal container.
* @ingroup NestedWidgets */
class NWidgetHorizontal : public NWidgetContainer {
class NWidgetHorizontal : public NWidgetPIPContainer {
public:
NWidgetHorizontal();
@ -253,7 +275,7 @@ public:
/** Vertical container.
* @ingroup NestedWidgets */
class NWidgetVertical : public NWidgetContainer {
class NWidgetVertical : public NWidgetPIPContainer {
public:
NWidgetVertical();
@ -278,7 +300,7 @@ public:
* @ingroup NestedWidgets */
class NWidgetBackground : public NWidgetCore {
public:
NWidgetBackground(WidgetType tp, Colours colour, int index, NWidgetContainer *child = NULL);
NWidgetBackground(WidgetType tp, Colours colour, int index, NWidgetPIPContainer *child = NULL);
~NWidgetBackground();
void Add(NWidgetBase *nwid);
@ -289,7 +311,7 @@ public:
void StoreWidgets(Widget *widgets, int length, bool left_moving, bool top_moving, bool rtl);
private:
NWidgetContainer *child; ///< Child widget.
NWidgetPIPContainer *child; ///< Child widget.
};
/** Leaf widget.
@ -333,6 +355,10 @@ bool CompareWidgetArrays(const Widget *orig, const Widget *gen, bool report = tr
* the child widgets (it has no meaning for the compiler but it makes the widget parts easier to read).
* Below the last child widget, use an #EndContainer part. This part should be aligned with the #NWidget part that started the container.
*
* - Stacked widgets #NWidgetStacked map each of their childs onto the same space. It behaves like a container, except there is no pre/inter/post space,
* so the widget does not support #SetPIP. #SetPadding is allowed though.
* Like the other container widgets, below the last child widgets, a #EndContainer part should be used to denote the end of the stacked widget.
*
* - Background widgets #NWidgetBackground start with a #NWidget(WidgetType tp, Colours col, int16 idx) part.
* What follows depends on how the widget is used.
* - If the widget is used as a leaf widget, that is, to create some space in the window to display a viewport or some text, use the properties of the
@ -589,7 +615,7 @@ static inline NWidgetPart NWidget(WidgetType tp, Colours col, int16 idx)
/**
* Widget part function for starting a new horizontal container, vertical container, or spacer widget.
* @param tp Type of the new nested widget, #NWID_HORIZONTAL(_LTR), #NWID_VERTICAL, or #NWID_SPACER
* @param tp Type of the new nested widget, #NWID_HORIZONTAL(_LTR), #NWID_VERTICAL, #NWID_SPACER, #NWID_SELECTION, or #NWID_LAYERED.
* @ingroup NestedWidgetParts
*/
static inline NWidgetPart NWidget(WidgetType tp)