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Sequencer: Implement zoom-to-fit view mode

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In this mode the preview image is always using the most of the preview
area space: it is scaled to fit, preserving aspect ratio. This makes it
possible to always have maximum of the preview region even after resize
of other areas.

This mode is enabled by default, is available in the View -> Zoom to Fit
menu. It is enabled when View All (Home key) is used, and is disabled
when manual navigation ([panning, zooming) is performed.

There is no versioning code, which means existing files will open as-is,
but new projects will have this option enabled.

Ref T78987

Maniphest Tasks: T78987

Differential Revision: https://developer.blender.org/D8549
This commit is contained in:
Sergey Sharybin
2020-08-12 11:05:40 +02:00
parent 0df28e8c20
commit 6fe609d4c3
6 changed files with 34 additions and 3 deletions
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21
source/blender/editors/space_sequencer/space_sequencer.c
View File

@@ -96,7 +96,8 @@ static SpaceLink *sequencer_create(const ScrArea *UNUSED(area), const Scene *sce
sseq->chanshown = 0;
sseq->view = SEQ_VIEW_SEQUENCE;
sseq->mainb = SEQ_DRAW_IMG_IMBUF;
sseq->flag = SEQ_SHOW_GPENCIL | SEQ_USE_ALPHA | SEQ_SHOW_MARKERS | SEQ_SHOW_FCURVES;
sseq->flag = SEQ_SHOW_GPENCIL | SEQ_USE_ALPHA | SEQ_SHOW_MARKERS | SEQ_SHOW_FCURVES |
SEQ_ZOOM_TO_FIT;
/* Tool header. */
region = MEM_callocN(sizeof(ARegion), "tool header for sequencer");
@@ -679,6 +680,22 @@ static void sequencer_preview_region_init(wmWindowManager *wm, ARegion *region)
WM_event_add_keymap_handler_v2d_mask(&region->handlers, keymap);
}
static void sequencer_preview_region_layout(const bContext *C, ARegion *region)
{
SpaceSeq *sseq = CTX_wm_space_seq(C);
if (sseq->flag & SEQ_ZOOM_TO_FIT) {
View2D *v2d = &region->v2d;
v2d->cur = v2d->tot;
}
}
static void sequencer_preview_region_view2d_changed(const bContext *C, ARegion *UNUSED(region))
{
SpaceSeq *sseq = CTX_wm_space_seq(C);
sseq->flag &= ~SEQ_ZOOM_TO_FIT;
}
static void sequencer_preview_region_draw(const bContext *C, ARegion *region)
{
ScrArea *area = CTX_wm_area(C);
@@ -881,6 +898,8 @@ void ED_spacetype_sequencer(void)
art = MEM_callocN(sizeof(ARegionType), "spacetype sequencer region");
art->regionid = RGN_TYPE_PREVIEW;
art->init = sequencer_preview_region_init;
art->layout = sequencer_preview_region_layout;
art->on_view2d_changed = sequencer_preview_region_view2d_changed;
art->draw = sequencer_preview_region_draw;
art->listener = sequencer_preview_region_listener;
art->keymapflag = ED_KEYMAP_TOOL | ED_KEYMAP_GIZMO | ED_KEYMAP_VIEW2D | ED_KEYMAP_FRAMES |