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draw only inside current scope

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This commit is contained in:
Timerix
2026-01-16 16:32:19 +05:00
parent f650e568d6
commit f4ed55a495
4 changed files with 107 additions and 33 deletions
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15
include/tim.h
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@@ -179,10 +179,10 @@ typedef struct TimScrollItem {
typedef struct TimScrollState { typedef struct TimScrollState {
TimScrollItem* items; TimScrollItem* items;
u32 len; i32 len;
u32 cur; i32 cur;
bool draw_border; bool draw_border;
bool show_scroll_bar_horizontal; bool show_scroll_bar_vertical;
bool use_mouse_wheel; bool use_mouse_wheel;
} TimScrollState; } TimScrollState;
@@ -264,6 +264,15 @@ i32 tim_enter_scope(i32 x, i32 y, i32 w, i32 h);
// exit scope and pop stack // exit scope and pop stack
i32 tim_exit_scope(void); i32 tim_exit_scope(void);
static inline bool tim_rect_does_fit(TimRect r){
return (
r.x >= 0 && r.y >= 0 &&
r.w >= 0 && r.h >= 0 &&
r.x + r.w <= tim->w &&
r.y + r.h <= tim->h
);
}
#pragma endregion #pragma endregion

48
src/drawing.c
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@@ -15,31 +15,49 @@ void tim_clear_cells(void) {
} }
void tim_draw_chr(TimCell cell, i32 x, i32 y) { void tim_draw_chr(TimCell cell, i32 x, i32 y) {
if (x >= 0 && x < tim->w && y >= 0 && y < tim->h) { TimRect scope = tim->scopes[tim->scope];
if(!tim_rect_does_fit(scope))
return;
if (x >= scope.x && x < scope.x + scope.w &&
y >= scope.y && y < scope.y + scope.h)
{
tim->cells[x + y * tim->w] = cell; tim->cells[x + y * tim->w] = cell;
} }
} }
void tim_draw_row(TimCell cell, i32 x, i32 y, i32 w) { void tim_draw_row(TimCell cell, i32 x, i32 y, i32 w) {
if (y >= 0 && y < tim->h && w > 0) { TimRect scope = tim->scopes[tim->scope];
for (i32 i = MAX(x, 0); i < MIN(x + w, tim->w); i++) { if(!tim_rect_does_fit(scope))
return;
if (y >= scope.y && y < scope.y + scope.h && w > 0) {
for (i32 i = MAX(x, scope.x); i < MIN(x + w, scope.x + scope.w); i++) {
tim->cells[i + y * tim->w] = cell; tim->cells[i + y * tim->w] = cell;
} }
} }
} }
void tim_draw_col(TimCell cell, i32 x, i32 y, i32 h) { void tim_draw_col(TimCell cell, i32 x, i32 y, i32 h) {
if (x >= 0 && x < tim->w && h > 0) { TimRect scope = tim->scopes[tim->scope];
for (i32 i = MAX(y, 0); i < MIN(y + h, tim->h); i++) { if(!tim_rect_does_fit(scope))
return;
if (x >= scope.x && x < scope.x + scope.w && h > 0) {
for (i32 i = MAX(y, scope.y); i < MIN(y + h, scope.y + scope.h); i++) {
tim->cells[x + i * tim->w] = cell; tim->cells[x + i * tim->w] = cell;
} }
} }
} }
void tim_fill(TimCell cell, i32 x, i32 y, i32 w, i32 h) { void tim_fill(TimCell cell, i32 x, i32 y, i32 w, i32 h) {
TimRect scope = tim->scopes[tim->scope];
if(!tim_rect_does_fit(scope))
return;
if (w > 0 && h > 0) { if (w > 0 && h > 0) {
for (i32 iy = MAX(y, 0); iy < MIN(y + h, tim->h); iy++) { for (i32 iy = MAX(y, scope.y); iy < MIN(y + h, scope.y + scope.h); iy++) {
for (i32 ix = MAX(x, 0); ix < MIN(x + w, tim->w); ix++) { for (i32 ix = MAX(x, scope.x); ix < MIN(x + w, scope.x + scope.w); ix++) {
tim->cells[ix + iy * tim->w] = cell; tim->cells[ix + iy * tim->w] = cell;
} }
} }
@@ -47,8 +65,12 @@ void tim_fill(TimCell cell, i32 x, i32 y, i32 w, i32 h) {
} }
void tim_draw_str(cstr s, i32 x, i32 y, i32 w, u8 fg, u8 bg) { void tim_draw_str(cstr s, i32 x, i32 y, i32 w, u8 fg, u8 bg) {
if (s && y >= 0 && x < tim->w && y < tim->h ) { TimRect scope = tim->scopes[tim->scope];
i32 end = MIN(x + w, tim->w); if(!tim_rect_does_fit(scope))
return;
if (s && y >= 0 && x < scope.x + scope.w && y < scope.y + scope.h ) {
i32 end = MIN(x + w, scope.x + scope.w);
bool wide = false; bool wide = false;
for (i32 i = 0; s[i] && x < end; x++) { for (i32 i = 0; s[i] && x < end; x++) {
TimCell c = tim_cell(&s[i], fg, bg); TimCell c = tim_cell(&s[i], fg, bg);
@@ -75,8 +97,12 @@ void tim_draw_box(i32 x, i32 y, i32 w, i32 h, u8 fg, u8 bg) {
} }
void tim_draw_invert(i32 x, i32 y, i32 w) { void tim_draw_invert(i32 x, i32 y, i32 w) {
if (y >= 0 && y < tim->h && w > 0) { TimRect scope = tim->scopes[tim->scope];
for (i32 i = MAX(x, 0); i < MIN(x + w, tim->w); i++) { if(!tim_rect_does_fit(scope))
return;
if (y >= 0 && y < scope.y + scope.h && w > 0) {
for (i32 i = MAX(x, scope.x); i < MIN(x + w, scope.x + scope.w); i++) {
TimCell c = tim->cells[i + y * tim->w]; TimCell c = tim->cells[i + y * tim->w];
tim->cells[i + y * tim->w].fg = c.bg; tim->cells[i + y * tim->w].fg = c.bg;
tim->cells[i + y * tim->w].bg = c.fg; tim->cells[i + y * tim->w].bg = c.fg;

9
src/scope.c
View File

@@ -35,10 +35,13 @@ TimRect tim_scope_rect_to_absolute(i32 x, i32 y, i32 w, i32 h) {
} }
i32 tim_enter_scope(i32 x, i32 y, i32 w, i32 h) { i32 tim_enter_scope(i32 x, i32 y, i32 w, i32 h) {
if (tim->scope + 1 >= TIM_MAX_SCOPE) { if (tim->scope + 1 >= TIM_MAX_SCOPE)
return 0; return 0;
}
TimRect r = tim_scope_rect_to_absolute(x, y, w, h); TimRect r = tim_scope_rect_to_absolute(x, y, w, h);
if(!tim_rect_does_fit(r))
return 0;
tim->scope += 1; tim->scope += 1;
tim->scopes[tim->scope] = r; tim->scopes[tim->scope] = r;
return 1; return 1;

68
src/scroll.c
View File

@@ -2,11 +2,13 @@
#include <math.h> #include <math.h>
void TimScrollState_selectNext(TimScrollState* l){ void TimScrollState_selectNext(TimScrollState* l){
l->cur = (l->cur + 1) % l->len; if(l->cur + 1 < l->len)
l->cur++;
} }
void TimScrollState_selectPrev(TimScrollState* l){ void TimScrollState_selectPrev(TimScrollState* l){
l->cur = (l->len + l->cur - 1) % l->len; if(l->cur - 1 >= 0)
l->cur--;
} }
TimScrollItem* tim_scroll(TimScrollState* l, i32 x, i32 y, i32 w, i32 h, TimStyle style){ TimScrollItem* tim_scroll(TimScrollState* l, i32 x, i32 y, i32 w, i32 h, TimStyle style){
@@ -38,22 +40,56 @@ TimScrollItem* tim_scroll(TimScrollState* l, i32 x, i32 y, i32 w, i32 h, TimStyl
} }
// draw scroll bar and shrink items_scope // draw scroll bar and shrink items_scope
if(l->show_scroll_bar_horizontal){ if(l->show_scroll_bar_vertical){
items_scope.w -= 1; items_scope.w -= 1;
i32 scrollbar_x = items_scope.x + items_scope.w; TimRect arrow_up_r = {
i32 scrollbar_y = items_scope.y; .x = items_scope.x + items_scope.w,
i32 scrollbar_h = items_scope.h - 2; .y = items_scope.y,
f32 slider_y_normalized = 0; .w = 1,
i32 slider_h = 0; .h = 1
if(l->len != 0){ };
slider_y_normalized = (f32)l->cur / l->len + 0.001f; TimRect scrollbar_r = {
slider_h = ceilf((f32)scrollbar_h / l->len); .x = arrow_up_r.x,
.y = arrow_up_r.y + 1,
.w = 1,
.h = items_scope.h - 2
};
TimRect arrow_down_r = {
.x = scrollbar_r.x,
.y = scrollbar_r.y + scrollbar_r.h,
.w = 1,
.h = 1
};
if (tim->event.type == TimEvent_Draw) {
f32 scroll_ratio = 0;
i32 slider_h = 0;
if(l->len != 0){
scroll_ratio = (f32)l->cur / l->len + 0.001f;
slider_h = ceilf((f32)scrollbar_r.h / l->len);
}
i32 slider_y = scrollbar_r.y + scrollbar_r.h * scroll_ratio;
tim_draw_chr(tim_cell("▲", style.brd, style.bg), arrow_up_r.x, arrow_up_r.y);
tim_draw_col(tim_cell("░", style.brd, style.bg), scrollbar_r.x, scrollbar_r.y, scrollbar_r.h);
tim_draw_col(tim_cell("█", style.brd, style.bg), scrollbar_r.x, slider_y, slider_h);
tim_draw_chr(tim_cell("▼", style.brd, style.bg), arrow_down_r.x, arrow_down_r.y);
}
if(tim_is_mouse_click_over(arrow_up_r)){
TimScrollState_selectPrev(l);
}
if(tim_is_mouse_click_over(arrow_down_r)){
TimScrollState_selectNext(l);
}
if(tim_is_mouse_click_over(scrollbar_r)){
i32 click_y_rel = tim->event.y - scrollbar_r.y;
f32 scroll_ratio = 0;
if(l->len != 0){
scroll_ratio = (f32)click_y_rel / scrollbar_r.h + 0.001f;
l->cur = l->len * scroll_ratio;
}
} }
i32 slider_y = scrollbar_y + 1 + scrollbar_h * slider_y_normalized;
tim_draw_chr(tim_cell("▲", style.brd, style.bg), scrollbar_x, scrollbar_y);
tim_draw_col(tim_cell("░", style.brd, style.bg), scrollbar_x, scrollbar_y + 1, scrollbar_h);
tim_draw_col(tim_cell("█", style.brd, style.bg), scrollbar_x, slider_y, slider_h);
tim_draw_chr(tim_cell("▼", style.brd, style.bg), scrollbar_x, scrollbar_y + scrollbar_h + 1);
} }
tim->scopes[tim->scope] = items_scope; // fit current scope inside frame and scrollbar tim->scopes[tim->scope] = items_scope; // fit current scope inside frame and scrollbar