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fix: support negative mouse coordiantes in vxfw/ScrollBars
authored by
CJ van den Berg
and committed by
Tim Culverhouse
eba27677
cec2f383
+10
-9
+10
-9
src/vxfw/ScrollBars.zig
+10
-9
src/vxfw/ScrollBars.zig
···
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switch (event) {
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.mouse => |mouse| {
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// 1. Process vertical scroll thumb hover.
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-
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const mouse_col: u16 = if (mouse.col < 0) 0 else @intCast(mouse.col);
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const mouse_row: u16 = if (mouse.row < 0) 0 else @intCast(mouse.row);
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const is_mouse_over_vertical_thumb =
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mouse.col == self.last_frame_size.width -| 1 and
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mouse.row >= self.vertical_thumb_top_row and
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mouse.row < self.vertical_thumb_bottom_row;
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mouse_col == self.last_frame_size.width -| 1 and
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mouse_row >= self.vertical_thumb_top_row and
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mouse_row < self.vertical_thumb_bottom_row;
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// Make sure we only update the state and redraw when it's necessary.
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if (!self.is_hovering_vertical_thumb and is_mouse_over_vertical_thumb) {
···
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if (did_start_dragging_vertical_thumb) {
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self.is_dragging_vertical_thumb = true;
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self.mouse_offset_into_thumb = @intCast(mouse.row -| self.vertical_thumb_top_row);
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self.mouse_offset_into_thumb = @intCast(mouse_row -| self.vertical_thumb_top_row);
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// No need to redraw yet, but we must consume the event.
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return ctx.consumeEvent();
···
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// 2. Process horizontal scroll thumb hover.
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const is_mouse_over_horizontal_thumb =
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mouse.row == self.last_frame_size.height -| 1 and
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mouse.col >= self.horizontal_thumb_start_col and
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mouse.col < self.horizontal_thumb_end_col;
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mouse_row == self.last_frame_size.height -| 1 and
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mouse_col >= self.horizontal_thumb_start_col and
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mouse_col < self.horizontal_thumb_end_col;
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// Make sure we only update the state and redraw when it's necessary.
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if (!self.is_hovering_horizontal_thumb and is_mouse_over_horizontal_thumb) {
···
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if (did_start_dragging_horizontal_thumb) {
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self.is_dragging_horizontal_thumb = true;
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self.mouse_offset_into_thumb = @intCast(
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mouse.col -| self.horizontal_thumb_start_col,
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mouse_col -| self.horizontal_thumb_start_col,
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);
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// No need to redraw yet, but we must consume the event.