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Basic scroll bars

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This commit is contained in:
Krzosa Karol
2024-07-02 08:42:39 +02:00
parent 186ec3c11d
commit aa41d9e15b
2 changed files with 65 additions and 5 deletions
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2
src/text_editor/layout.cpp
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@@ -34,6 +34,8 @@ struct Window {
Range selection_anchor_point;
bool mouse_selecting;
bool mouse_selecting_hori_bar;
bool mouse_selecting_vert_bar;
Vec2 scroll; // window_world_to_window_units
Cursor main_cursor_begin_frame;
Array<Cursor> cursors;

68
src/text_editor/main.cpp
View File

@@ -94,7 +94,7 @@ int main() {
for (int i = 0; i < 50; i += 1) {
BeforeEdit(&window);
Array<Edit> edits = {FrameArena};
AddEdit(&edits, GetEnd(window.buffer), Format(FrameArena, "line number: %d\n", i));
AddEdit(&edits, GetEnd(window.buffer), Format(FrameArena, "line number line number line number line number line number line number: %d\n", i));
ApplyEdits(&window, edits);
AfterEdit(&window, edits);
}
@@ -124,6 +124,7 @@ int main() {
float mouse_wheel = GetMouseWheelMove() * 48;
focused_window->scroll.y -= mouse_wheel;
focused_window->scroll.y = ClampBottom(focused_window->scroll.y, 0.f);
focused_window->scroll.x = ClampBottom(focused_window->scroll.x, 0.f);
MergeCursors(focused_window);
if (IsKeyDown(KEY_LEFT_CONTROL) && IsKeyPressed(KEY_A)) {
@@ -418,19 +419,76 @@ int main() {
ForItem(window, windows) {
// Draw and layout window overlay
Vec2 mouse = GetMousePosition();
{
window.rect = window.start_rect;
Rect2 horizontal_bar_rect = CutBottom(&window.rect, 10);
Rect2 vertical_bar_rect = CutRight(&window.rect, 10);
Rect2 line_numbers = CutLeft(&window.rect, 50);
Rectangle rectangle_in_render_units = ToRectangle(window.rect);
DrawRectangleRec(rectangle_in_render_units, WHITE);
DrawRectangleRec(ToRectangle(window.rect), WHITE);
Vec2 size = GetSize(window.rect);
Vec2 min = window.scroll / window.layout.buffer_world_pixel_size;
Vec2 max = (window.scroll + size) / window.layout.buffer_world_pixel_size;
DrawRectangleRec(ToRectangle(vertical_bar_rect), GRAY);
{
float vert_size = GetSize(vertical_bar_rect).y;
float vert_begin = min.y * vert_size;
float vert_end = max.y * vert_size;
Rect2 rect = vertical_bar_rect;
rect.min.y = vert_begin;
rect.max.y = vert_end;
rect = Shrink(rect, 2);
DrawRectangleRec(ToRectangle(rect), LIGHTGRAY);
if (CheckCollisionPointRec(mouse, ToRectangle(vertical_bar_rect))) {
if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
window.mouse_selecting_vert_bar = true;
}
}
if (window.mouse_selecting_vert_bar) {
if (IsMouseButtonDown(MOUSE_BUTTON_LEFT) == false) {
window.mouse_selecting_vert_bar = false;
}
float value = GetMouseDelta().y / vert_size;
window.scroll.y += value * window.layout.buffer_world_pixel_size.y;
window.scroll.y = ClampBottom(window.scroll.y, 0.f);
}
}
DrawRectangleRec(ToRectangle(horizontal_bar_rect), GRAY);
{
float hori_size = GetSize(horizontal_bar_rect).x;
float hori_begin = min.x * hori_size;
float hori_end = max.x * hori_size;
Rect2 rect = horizontal_bar_rect;
rect.min.x = hori_begin;
rect.max.x = hori_end;
rect = Shrink(rect, 2);
DrawRectangleRec(ToRectangle(rect), LIGHTGRAY);
if (CheckCollisionPointRec(mouse, ToRectangle(horizontal_bar_rect))) {
if (IsMouseButtonPressed(MOUSE_BUTTON_LEFT)) {
window.mouse_selecting_hori_bar = true;
}
}
if (window.mouse_selecting_hori_bar) {
if (IsMouseButtonDown(MOUSE_BUTTON_LEFT) == false) {
window.mouse_selecting_hori_bar = false;
}
float value = GetMouseDelta().x / hori_size;
window.scroll.x += value * window.layout.buffer_world_pixel_size.x;
window.scroll.x = ClampBottom(window.scroll.x, 0.f);
}
}
}
// Mouse selection
{
Vec2 mouse = GetMousePosition();
if (!window.mouse_selecting_hori_bar && !window.mouse_selecting_vert_bar) {
bool mouse_in_window = CheckCollisionPointRec(mouse, ToRectangle(window.rect));
if (!window.mouse_selecting && mouse_in_window) {
SetMouseCursor(MOUSE_CURSOR_IBEAM);