4coder/4ed_layout.cpp

472 lines
14 KiB
C++

/*
* Mr. 4th Dimention - Allen Webster
*
* 19.08.2015
*
* Panel layout functions
*
*/
// TOP
internal Panel_Split
make_panel_split(Panel_Split_Kind kind, i32 v){
Panel_Split split = {};
split.kind = kind;
split.v_i32 = v;
return(split);
}
internal Panel_Split
make_panel_split(Panel_Split_Kind kind, f32 v){
Panel_Split split = {};
split.kind = kind;
split.v_f32 = v;
return(split);
}
internal Panel_Split
make_panel_split_50_50(void){
return(make_panel_split(PanelSplitKind_Ratio_Min, 0.5f));
}
internal Panel*
layout__alloc_panel(Layout *layout){
Panel *panel = 0;
Node *node = layout->free_panels.next;
if (node != &layout->free_panels){
dll_remove(node);
panel = CastFromMember(Panel, node, node);
}
return(panel);
}
internal void
layout__free_panel(Layout *layout, Panel *panel){
Assert(panel != layout->active_panel);
Assert(panel != layout->root);
dll_remove(&panel->node);
dll_insert(&layout->free_panels, &panel->node);
panel->kind = PanelKind_Unused;
}
internal void
layout__set_panel_rectangle(Layout *layout, Panel *panel, Rect_i32 rect){
panel->rect_full = rect;
panel->rect_inner = rect_inner(rect, layout->margin);
}
internal i32
layout__evaluate_split(Panel_Split split, i32 v0, i32 v1){
i32 v = 0;
switch (split.kind){
case PanelSplitKind_Ratio_Min:
{
v = round32(lerp((f32)v0, split.v_f32, (f32)v1));
}break;
case PanelSplitKind_Ratio_Max:
{
v = round32(lerp((f32)v1, split.v_f32, (f32)v0));
}break;
case PanelSplitKind_FixedPixels_Min:
{
v = clamp_top(v0 + split.v_i32, v1);
}break;
case PanelSplitKind_FixedPixels_Max:
{
v = clamp_bot(v0, v1 - split.v_i32);
}break;
}
return(v);
}
internal void
layout_propogate_sizes_down_from_node(Layout *layout, Panel *panel){
if (panel->kind == PanelKind_Intermediate){
Panel *tl_panel = panel->tl_panel;
Panel *br_panel = panel->br_panel;
Rect_i32 r1 = panel->rect_full;
Rect_i32 r2 = panel->rect_full;
if (panel->vertical_split){
i32 x_pos = layout__evaluate_split(panel->split, r1.x0, r1.x1);
r1.x1 = x_pos;
r2.x0 = x_pos;
}
else{
i32 y_pos = layout__evaluate_split(panel->split, r1.y0, r1.y1);
r1.y1 = y_pos;
r2.y0 = y_pos;
}
layout__set_panel_rectangle(layout, tl_panel, r1);
layout__set_panel_rectangle(layout, br_panel, r2);
layout_propogate_sizes_down_from_node(layout, tl_panel);
layout_propogate_sizes_down_from_node(layout, br_panel);
}
}
internal i32
layout_get_open_panel_count(Layout *layout){
return(layout->open_panel_count);
}
internal Panel*
layout_get_first_open_panel(Layout *layout){
Panel *panel = CastFromMember(Panel, node, layout->open_panels.next);
if (panel != 0 && &panel->node == &layout->open_panels){
panel = 0;
}
AssertImplies(panel != 0, panel->kind == PanelKind_Final);
return(panel);
}
internal Panel*
layout_get_next_open_panel(Layout *layout, Panel *panel){
panel = CastFromMember(Panel, node, panel->node.next);
if (&panel->node == &layout->open_panels){
panel = 0;
}
AssertImplies(panel != 0, panel->kind == PanelKind_Final);
return(panel);
}
internal Panel*
layout_get_prev_open_panel(Layout *layout, Panel *panel){
panel = CastFromMember(Panel, node, panel->node.prev);
if (&panel->node == &layout->open_panels){
panel = 0;
}
AssertImplies(panel != 0, panel->kind == PanelKind_Final);
return(panel);
}
internal Panel*
layout_get_active_panel(Layout *layout){
return(layout->active_panel);
}
internal b32
layout_split_panel(Layout *layout, Panel *panel, b32 vertical_split, Panel **new_panel_out){
b32 result = false;
if (layout->open_panel_count < layout->open_panel_max_count){
Panel *min_panel = layout__alloc_panel(layout);
Panel *max_panel = layout__alloc_panel(layout);
dll_remove(&panel->node);
dll_insert(&layout->intermediate_panels, &panel->node);
dll_insert(&layout->open_panels, &min_panel->node);
dll_insert(&layout->open_panels, &max_panel->node);
// init min_panel
panel->view->panel = min_panel;
min_panel->parent = panel;
min_panel->kind = PanelKind_Final;
min_panel->view = panel->view;
// init max_panel
*new_panel_out = max_panel;
max_panel->parent = panel;
max_panel->kind = PanelKind_Final;
max_panel->view = 0;
// modify panel
panel->kind = PanelKind_Intermediate;
panel->tl_panel = min_panel;
panel->br_panel = max_panel;
panel->vertical_split = vertical_split;
panel->split = make_panel_split_50_50();
// propogate rectangle sizes down from the new intermediate to
// resize the panel and the new panel.
layout_propogate_sizes_down_from_node(layout, panel);
// update layout state
layout->open_panel_count += 1;
layout->active_panel = max_panel;
layout->panel_state_dirty = true;
result = true;
}
return(result);
}
internal b32
layout_close_panel(Layout *layout, Panel *panel){
b32 result = false;
if (layout->open_panel_count > 1){
Panel *parent = panel->parent;
Assert(parent != 0);
// find sibling
Panel *sibling = 0;
if (parent->tl_panel == panel){
sibling = parent->br_panel;
}
else{
Assert(parent->br_panel == panel);
sibling = parent->tl_panel;
}
// update layout state
if (layout->active_panel == panel){
Panel *new_active = sibling;
for (;new_active->kind == PanelKind_Intermediate;){
new_active = new_active->br_panel;
}
layout->active_panel = new_active;
}
layout->panel_state_dirty = true;
layout->open_panel_count -= 1;
// link grand parent and sibling
Panel *g_parent = parent->parent;
sibling->parent = g_parent;
if (g_parent != 0){
if (g_parent->tl_panel == parent){
g_parent->tl_panel = sibling;
}
else{
Assert(g_parent->br_panel == parent);
g_parent->br_panel = sibling;
}
}
else{
Assert(parent == layout->root);
layout->root = sibling;
}
// set sibling's size
sibling->screen_region = parent->screen_region;
// set the sizes down stream of sibling
layout_propogate_sizes_down_from_node(layout, sibling);
// free panel and parent
layout__free_panel(layout, panel);
layout__free_panel(layout, parent);
result = true;
}
return(result);
}
internal Panel*
layout_initialize(Arena *arena, Layout *layout){
i32 panel_alloc_count = MAX_VIEWS*2 - 1;
Panel *panels = push_array(arena, Panel, panel_alloc_count);
block_zero(panels, sizeof(*panels)*panel_alloc_count);
layout->panel_first = panels;
layout->panel_one_past_last = panels + panel_alloc_count;
layout->margin = 3;
layout->open_panel_count = 0;
layout->open_panel_max_count = MAX_VIEWS;
dll_init_sentinel(&layout->open_panels);
dll_init_sentinel(&layout->intermediate_panels);
Panel *panel = panels;
layout->free_panels.next = &panel->node;
panel->node.prev = &layout->free_panels;
for (i32 i = 1; i < MAX_VIEWS; i += 1, panel += 1){
panel[1].node.prev = &panel[0].node;
panel[0].node.next = &panel[1].node;
}
panel->node.next = &layout->free_panels;
layout->free_panels.prev = &panel->node;
panel = layout__alloc_panel(layout);
panel->parent = 0;
panel->kind = PanelKind_Final;
panel->view = 0;
block_zero_struct(&panel->screen_region);
dll_insert(&layout->open_panels, &panel->node);
layout->open_panel_count += 1;
layout->root = panel;
layout->active_panel = panel;
layout->panel_state_dirty = true;
return(panel);
}
internal void
layout_set_margin(Layout *layout, i32 margin){
if (layout->margin != margin){
layout->margin = margin;
layout__set_panel_rectangle(layout, layout->root, Ri32(0, 0, layout->full_dim.x, layout->full_dim.y));
layout_propogate_sizes_down_from_node(layout, layout->root);
layout->panel_state_dirty = true;
}
}
internal void
layout_set_root_size(Layout *layout, Vec2_i32 dim){
if (layout->full_dim != dim){
layout->full_dim = dim;
layout__set_panel_rectangle(layout, layout->root, Ri32(0, 0, dim.x, dim.y));
layout_propogate_sizes_down_from_node(layout, layout->root);
layout->panel_state_dirty = true;
}
}
internal Vec2_i32
layout_get_root_size(Layout *layout){
return(layout->full_dim);
}
internal i32
layout_get_absolute_position_of_split(Panel *panel){
i32 pos = 0;
if (panel->vertical_split){
pos = layout__evaluate_split(panel->split, panel->rect_full.x0, panel->rect_full.x1);
}
else{
pos = layout__evaluate_split(panel->split, panel->rect_full.y0, panel->rect_full.y1);
}
return(pos);
}
internal Range
layout__get_limiting_range_on_split_children(i32 mid, b32 vertical_split, Panel *panel, Range range){
if (panel->kind == PanelKind_Intermediate){
if (vertical_split == panel->vertical_split){
i32 pos = layout_get_absolute_position_of_split(panel);
if (mid < pos && pos < range.max){
range.max = pos;
}
else if (range.min < pos && pos < mid){
range.min = pos;
}
}
range = layout__get_limiting_range_on_split_children(mid, vertical_split, panel->tl_panel, range);
range = layout__get_limiting_range_on_split_children(mid, vertical_split, panel->br_panel, range);
}
return(range);
}
internal Range
layout_get_limiting_range_on_split(Layout *layout, Panel *panel){
// root level min max
Range range = {};
if (panel->vertical_split){
range.max = layout->full_dim.x;
}
else{
range.max = layout->full_dim.y;
}
// get mid
i32 mid = layout_get_absolute_position_of_split(panel);
// parents min max
for (Panel *panel_it = panel;
panel_it != 0;
panel_it = panel_it->parent){
if (panel->vertical_split == panel_it->vertical_split){
i32 pos = layout_get_absolute_position_of_split(panel_it);
if (mid < pos && pos < range.max){
range.max = pos;
}
else if (range.min < pos && pos < mid){
range.min = pos;
}
}
}
// children min max
if (panel->kind == PanelKind_Intermediate){
range = layout__get_limiting_range_on_split_children(mid, panel->vertical_split, panel->tl_panel, range);
range = layout__get_limiting_range_on_split_children(mid, panel->vertical_split, panel->br_panel, range);
}
return(range);
}
internal void
layout__reverse_evaluate_panel_split(Panel *panel, i32 position){
i32 v0 = 0;
i32 v1 = 0;
if (panel->vertical_split){
v0 = panel->rect_full.x0;
v1 = panel->rect_full.x1;
}
else{
v0 = panel->rect_full.y0;
v1 = panel->rect_full.y1;
}
switch (panel->split.kind){
case PanelSplitKind_Ratio_Min:
{
panel->split.v_f32 = unlerp((f32)v0, (f32)position, (f32)v1);
}break;
case PanelSplitKind_Ratio_Max:
{
panel->split.v_f32 = unlerp((f32)v1, (f32)position, (f32)v0);
}break;
case PanelSplitKind_FixedPixels_Min:
{
panel->split.v_i32 = clamp(v0, position, v1) - v0;
}break;
case PanelSplitKind_FixedPixels_Max:
{
panel->split.v_i32 = v1 - clamp(v0, position, v1);
}break;
}
}
internal void
layout__set_split_absolute_position_inner(Panel *panel){
if (panel->kind == PanelKind_Intermediate){
Rect_i32 r = panel->rect_full;
i32 position = 0;
if (panel->vertical_split){
position = layout__evaluate_split(panel->split, r.x0, r.x1);
}
else{
position = layout__evaluate_split(panel->split, r.y0, r.y1);
}
layout__reverse_evaluate_panel_split(panel, position);
}
}
internal void
layout_set_split_absolute_position(Layout *layout, Panel *panel, i32 absolute_position){
if (panel->kind == PanelKind_Intermediate){
layout__reverse_evaluate_panel_split(panel, absolute_position);
layout__set_split_absolute_position_inner(panel->tl_panel);
layout__set_split_absolute_position_inner(panel->br_panel);
layout_propogate_sizes_down_from_node(layout, panel);
layout->panel_state_dirty = true;
}
}
internal Panel_ID
panel_get_id(Layout *layout, Panel *panel){
Panel_ID id = 0;
if (layout->panel_first <= panel && panel < layout->panel_one_past_last){
id = (Panel_ID)(panel - layout->panel_first) + 1;
}
return(id);
}
////////////////////////////////
internal Panel*
imp_get_panel(Models *models, Panel_ID panel_id){
Layout *layout = &models->layout;
Panel *panel = layout->panel_first + panel_id - 1;
if (!(layout->panel_first <= panel && panel < layout->panel_one_past_last)){
panel = 0;
}
return(panel);
}
// BOTTOM