314 lines
7.6 KiB
C++
314 lines
7.6 KiB
C++
/*
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* Mr. 4th Dimention - Allen Webster
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*
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* 19.08.2015
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*
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* Panel layout and general view functions for 4coder
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*
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*/
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// TOP
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struct Panel_Divider{
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Panel_Divider *next;
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i32 parent;
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i32 which_child;
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i32 child1, child2;
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b32 v_divider;
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i32 pos;
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};
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struct Screen_Region{
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i32_Rect full;
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i32_Rect inner;
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i32_Rect prev_inner;
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i32 l_margin, r_margin;
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i32 t_margin, b_margin;
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};
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struct Panel{
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Panel *next;
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Panel *prev;
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struct View *view;
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i32 parent;
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i32 which_child;
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int ALLOCED;
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union{
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struct{
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i32_Rect full;
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i32_Rect inner;
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i32_Rect prev_inner;
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i32 l_margin, r_margin;
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i32 t_margin, b_margin;
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};
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Screen_Region screen_region;
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};
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};
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struct Editing_Layout{
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Panel *panels;
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Panel free_sentinel;
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Panel used_sentinel;
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Panel_Divider *dividers;
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Panel_Divider *free_divider;
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i32 panel_count, panel_max_count;
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i32 root;
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i32 active_panel;
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i32 full_width, full_height;
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};
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struct Divider_And_ID{
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Panel_Divider* divider;
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i32 id;
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};
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struct Panel_And_ID{
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Panel* panel;
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i32 id;
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};
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internal void
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panel_init(Panel *panel){
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panel->view = 0;
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panel->parent = -1;
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panel->which_child = 0;
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panel->screen_region.full = {};
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panel->screen_region.inner = {};
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panel->screen_region.prev_inner = {};
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panel->l_margin = 3;
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panel->r_margin = 3;
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panel->t_margin = 3;
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panel->b_margin = 3;
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}
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internal Divider_And_ID
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layout_alloc_divider(Editing_Layout *layout){
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Divider_And_ID result;
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Assert(layout->free_divider);
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result.divider = layout->free_divider;
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layout->free_divider = result.divider->next;
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*result.divider = {};
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result.divider->parent = -1;
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result.divider->child1 = -1;
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result.divider->child2 = -1;
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result.id = (i32)(result.divider - layout->dividers);
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if (layout->panel_count == 1){
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layout->root = result.id;
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}
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return(result);
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}
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internal Divider_And_ID
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layout_get_divider(Editing_Layout *layout, i32 id){
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Divider_And_ID result;
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Assert(id >= 0 && id < layout->panel_max_count-1);
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result.id = id;
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result.divider = layout->dividers + id;
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return(result);
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}
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internal void
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layout_free_divider(Editing_Layout *layout, Panel_Divider *divider){
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divider->next = layout->free_divider;
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layout->free_divider = divider;
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}
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internal Panel_And_ID
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layout_alloc_panel(Editing_Layout *layout){
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Panel_And_ID result = {};
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Assert(layout->panel_count < layout->panel_max_count);
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++layout->panel_count;
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result.panel = layout->free_sentinel.next;
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dll_remove(result.panel);
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dll_insert(&layout->used_sentinel, result.panel);
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panel_init(result.panel);
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result.id = (i32)(result.panel - layout->panels);
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result.panel->ALLOCED = 1;
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return(result);
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}
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internal void
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layout_free_panel(Editing_Layout *layout, Panel *panel){
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dll_remove(panel);
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dll_insert(&layout->free_sentinel, panel);
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--layout->panel_count;
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panel->ALLOCED = 0;
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}
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internal Divider_And_ID
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layout_calc_divider_id(Editing_Layout *layout, Panel_Divider *divider){
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Divider_And_ID result;
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result.divider = divider;
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result.id = (i32)(divider - layout->dividers);
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return result;
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}
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struct Split_Result{
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Panel_Divider *divider;
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Panel *panel;
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};
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internal Split_Result
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layout_split_panel(Editing_Layout *layout, Panel *panel, b32 vertical){
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Split_Result result = {};
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Divider_And_ID div = {}, parent_div = {};
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Panel_And_ID new_panel = {};
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div = layout_alloc_divider(layout);
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if (panel->parent != -1){
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parent_div = layout_get_divider(layout, panel->parent);
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if (panel->which_child == -1){
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parent_div.divider->child1 = div.id;
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}
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else{
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parent_div.divider->child2 = div.id;
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}
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}
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div.divider->parent = panel->parent;
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div.divider->which_child = panel->which_child;
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if (vertical){
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div.divider->v_divider = 1;
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div.divider->pos = (panel->full.x0 + panel->full.x1) / 2;
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}
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else{
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div.divider->v_divider = 0;
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div.divider->pos = (panel->full.y0 + panel->full.y1) / 2;
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}
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new_panel = layout_alloc_panel(layout);
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panel->parent = div.id;
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panel->which_child = -1;
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new_panel.panel->parent = div.id;
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new_panel.panel->which_child = 1;
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result.divider = div.divider;
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result.panel = new_panel.panel;
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return result;
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}
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internal void
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panel_fix_internal_area(Panel *panel){
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panel->inner.x0 = panel->full.x0 + panel->l_margin;
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panel->inner.x1 = panel->full.x1 - panel->r_margin;
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panel->inner.y0 = panel->full.y0 + panel->t_margin;
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panel->inner.y1 = panel->full.y1 - panel->b_margin;
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}
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internal void
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layout_fix_all_panels(Editing_Layout *layout){
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Panel *panel;
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Panel_Divider *dividers = layout->dividers;
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i32 panel_count = layout->panel_count;
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i32_Rect r;
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i32 pos, which_child, action;
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Divider_And_ID div;
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if (panel_count > 1){
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for (panel = layout->used_sentinel.next;
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panel != &layout->used_sentinel;
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panel = panel->next){
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r.x0 = 0;
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r.x1 = r.x0 + layout->full_width;
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r.y0 = 0;
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r.y1 = r.y0 + layout->full_height;
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which_child = panel->which_child;
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div.id = panel->parent;
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for (;;){
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Assert(div.id != -1);
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div.divider = dividers + div.id;
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pos = div.divider->pos;
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action = (div.divider->v_divider << 1) | (which_child > 0);
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switch (action){
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case 0: // v_divider : 0, which_child : -1
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if (pos < r.y1) r.y1 = pos;
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break;
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case 1: // v_divider : 0, which_child : 1
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if (pos > r.y0) r.y0 = pos;
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break;
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case 2: // v_divider : 1, which_child : -1
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if (pos < r.x1) r.x1 = pos;
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break;
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case 3: // v_divider : 1, which_child : 1
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if (pos > r.x0) r.x0 = pos;
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break;
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}
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if (div.id != layout->root){
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div.id = div.divider->parent;
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which_child = div.divider->which_child;
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}
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else{
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break;
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}
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}
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panel->full = r;
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panel_fix_internal_area(panel);
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}
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}
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else{
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panel = layout->used_sentinel.next;
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panel->full.x0 = 0;
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panel->full.y0 = 0;
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panel->full.x1 = layout->full_width;
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panel->full.y1 = layout->full_height;
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panel_fix_internal_area(panel);
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}
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}
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internal void
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layout_refit(Editing_Layout *layout, i32 prev_width, i32 prev_height){
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Panel_Divider *dividers = layout->dividers;
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i32 max = layout->panel_max_count - 1;
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f32 h_ratio, v_ratio;
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Panel_Divider *divider = dividers;
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i32 i;
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if (layout->panel_count > 1){
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Assert(prev_width != 0 && prev_height != 0);
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h_ratio = ((f32)layout->full_width) / prev_width;
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v_ratio = ((f32)layout->full_height) / prev_height;
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for (i = 0; i < max; ++i, ++divider){
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if (divider->v_divider){
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divider->pos = ROUND32((divider->pos) * h_ratio);
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}
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else{
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divider->pos = ROUND32((divider->pos) * v_ratio);
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}
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}
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}
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layout_fix_all_panels(layout);
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}
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// BOTTOM
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