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Add shortcuts to zoom in/out and reset the zoom

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This commit is contained in:
Eevee (Evelyn Woods) 2024-04-22 09:07:55 -06:00
parent 3a9e7c1cd8
commit 5f80e880c2
1 changed files with 42 additions and 26 deletions
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68
js/editor/main.js
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@ -207,6 +207,15 @@ export class Editor extends PrimaryView {
this.redraw_foreground_tile();
}
}
else if (ev.key === '-') {
this.zoom_by(-1);
}
else if (ev.key === '=') {
this.zoom_by(+1);
}
else if (ev.key === '1') {
this.set_canvas_zoom(1);
}
else if (TOOL_SHORTCUTS[ev.key]) {
this.select_tool(TOOL_SHORTCUTS[ev.key]);
}
@ -309,35 +318,12 @@ export class Editor extends PrimaryView {
// TODO Alt: Scroll through palette
let index = ZOOM_LEVELS.findIndex(el => el >= this.zoom);
if (index < 0) {
index = ZOOM_LEVELS.length - 1;
}
let new_zoom;
if (ev.deltaY > 0) {
// Zoom out
if (ZOOM_LEVELS[index] !== this.zoom) {
// If we're between levels, pretend we're one level in
index += 1;
}
if (index <= 0)
return;
new_zoom = ZOOM_LEVELS[index - 1];
this.zoom_by(-1, ev.clientX, ev.clientY);
}
else {
// Zoom in
if (ZOOM_LEVELS[index] !== this.zoom) {
index -= 1;
this.zoom_by(+1, ev.clientX, ev.clientY);
}
if (index >= ZOOM_LEVELS.length - 1)
return;
new_zoom = ZOOM_LEVELS[index + 1];
}
// FIXME preserve the panning such that the point under the cursor doesn't move
// (possibly difficult given that i can't pan at all if there are no scrollbars??)
// FIXME add a widget to status bar
this.set_canvas_zoom(new_zoom, ev.clientX, ev.clientY);
});
// Toolbox
@ -1122,13 +1108,43 @@ export class Editor extends PrimaryView {
// ------------------------------------------------------------------------------------------------
zoom_by(dz, origin_x = null, origin_y = null) {
if (dz === 0)
return;
let index = ZOOM_LEVELS.findIndex(el => el >= this.zoom);
if (index < 0) {
index = ZOOM_LEVELS.length - 1;
}
let new_zoom;
if (ZOOM_LEVELS[index] !== this.zoom) {
// If we're between levels, round to the level away from the direction we're trying to
// zoom, so that one notch will take us to the next nearest zoom level
index -= Math.sign(dz);
}
index += dz;
if (index < 0 || index >= ZOOM_LEVELS.length)
return;
this.set_canvas_zoom(ZOOM_LEVELS[index], origin_x, origin_y);
}
set_canvas_zoom(zoom, origin_x = null, origin_y = null) {
// Adjust scrolling so that the point under the mouse cursor remains fixed
let scroll_adjust_x = null;
let scroll_adjust_y = null;
if (origin_x !== null && this.zoom) {
if (this.zoom) {
if (origin_x === null) {
// Default to zooming around the center of the viewport
let bbox = this.viewport_el.getBoundingClientRect();
origin_x = bbox.left + bbox.width / 2;
origin_y = bbox.top + bbox.height / 2;
}
// FIXME possible sign of a bad api
let [frac_cell_x, frac_cell_y] = this.renderer.real_cell_coords_from_event({clientX: origin_x, clientY: origin_y});
// Zooming is really just resizing a DOM element, which doesn't affect either the
// transparent border or the scroll position, so zooming from Z1 to Z2 will move a point
// from X * Z1 to X * Z2. To keep it at the same client point, the scroll position