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timeline.cpp
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timeline.cpp
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// Timeline widget
#include "timeline.h"
#include "app.h"
#include "widgets.h"
#include "editing.h"
#include "colors.h"
#include <opentimelineio/clip.h>
#include <opentimelineio/composable.h>
#include <opentimelineio/effect.h>
#include <opentimelineio/gap.h>
#include <opentimelineio/linearTimeWarp.h>
#include <opentimelineio/marker.h>
#include <opentimelineio/transition.h>
#include <opentimelineio/track.h>
// counters to measure visibility-check performance optimization
static int __tracks_rendered;
static int __items_rendered;
double
TimeScalarForItem(otio::Item* item) {
double time_scalar = 1.0;
for (const auto& effect : item->effects()) {
if (const auto& timewarp = dynamic_cast<otio::LinearTimeWarp*>(effect.value)) {
time_scalar *= timewarp->time_scalar();
}
}
return time_scalar;
}
//otio::RationalTime TopLevelTime(otio::RationalTime time, otio::Item* context) {
// return context->transformed_time(time, appState.timeline->tracks());
//}
//
//otio::TimeRange TopLevelTimeRange(otio::TimeRange range, otio::Item* context) {
// return context->transformed_time_range(range, appState.timeline->tracks());
//}
// Transform this range map from the context item's coodinate space
// into the top-level timeline's coordinate space. This compensates for
// any source_range offsets in intermediate levels of nesting in the
// composition.
void TopLevelTimeRangeMap(
std::map<otio::Composable*, otio::TimeRange>& range_map,
otio::Item* context) {
auto zero = otio::RationalTime();
auto top = appState.timeline->tracks();
auto offset = context->transformed_time(zero, top);
for (auto& pair : range_map) {
auto& range = pair.second;
range = otio::TimeRange(range.start_time() + offset, range.duration());
}
}
void DrawItem(
otio::Item* item,
float scale,
ImVec2 origin,
float height,
std::map<otio::Composable*, otio::TimeRange>& range_map) {
auto duration = item->duration();
auto trimmed_range = item->trimmed_range();
float width = duration.to_seconds() * scale;
if (width < 1)
return;
const ImVec2 text_offset(5.0f, 5.0f);
float font_height = ImGui::GetTextLineHeight();
float font_width = font_height * 0.5; // estimate
// is there enough horizontal space for labels at all?
bool show_label = width > text_offset.x * 2;
// is there enough vertical *and* horizontal space for time ranges?
bool show_time_range = (height > font_height * 2 + text_offset.y * 2)
&& (width > font_width * 15);
auto range_it = range_map.find(item);
if (range_it == range_map.end()) {
Log("Couldn't find %s in range map?!", item->name().c_str());
assert(false);
}
auto item_range = range_it->second;
ImVec2 size(width, height);
ImVec2 render_pos(
item_range.start_time().to_seconds() * scale + origin.x,
ImGui::GetCursorPosY());
std::string label_str = item->name();
auto label_color = appTheme.colors[AppThemeCol_Label];
auto fill_color = appTheme.colors[AppThemeCol_Item];
auto selected_fill_color = appTheme.colors[AppThemeCol_ItemSelected];
auto hover_fill_color = appTheme.colors[AppThemeCol_ItemHovered];
bool fancy_corners = true;
auto item_color = GetItemColor(item);
if (item_color != "") {
fill_color = UIColorFromName(item_color);
fill_color = TintedColorForUI(fill_color);
}
if (auto gap = dynamic_cast<otio::Gap*>(item)) {
// different colors & style
fill_color = appTheme.colors[AppThemeCol_Background];
selected_fill_color = appTheme.colors[AppThemeCol_GapSelected];
hover_fill_color = appTheme.colors[AppThemeCol_GapHovered];
label_str = "";
fancy_corners = false;
show_time_range = false;
}
auto old_pos = ImGui::GetCursorPos();
ImGui::SetCursorPos(render_pos);
ImGui::PushID(item);
ImGui::BeginGroup();
ImGui::InvisibleButton("##Item", size);
if (!ImGui::IsItemVisible()) {
// exit early if this item is off-screen
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
return;
}
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
if (!ImGui::IsRectVisible(p0, p1)) {
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
return;
}
ImGui::SetItemAllowOverlap();
// Dragging...
// if (ImGui::IsItemActive() && ImGui::IsMouseDragging(ImGuiMouseButton_Left))
// {
// offset.x += ImGui::GetIO().MouseDelta.x;
// offset.y += ImGui::GetIO().MouseDelta.y;
// }
if (ImGui::IsItemHovered()) {
fill_color = hover_fill_color;
}
if (ImGui::IsItemClicked()) {
SelectObject(item);
}
if (appState.selected_object == item) {
fill_color = selected_fill_color;
}
if (ColorIsBright(fill_color)) {
label_color = ColorInvert(label_color);
}
ImGui::PushClipRect(p0, p1, true);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
auto light_edge_color = ImColor(255, 255, 255, 255 * 0.4);
auto dark_edge_color = ImColor(0, 0, 0, 255 * 0.5);
if (fancy_corners) {
const ImDrawFlags corners_tl_br = ImDrawFlags_RoundCornersTopLeft
| ImDrawFlags_RoundCornersBottomRight;
const float corner_radius = 5.0f;
draw_list
->AddRectFilled(p0, p1, fill_color, corner_radius, corners_tl_br);
// top edge
draw_list->AddLine(
ImVec2(p0.x + corner_radius, p0.y),
ImVec2(p1.x, p0.y),
light_edge_color);
// bottom edge
draw_list->AddLine(
ImVec2(p0.x, p1.y - 1),
ImVec2(p1.x - corner_radius, p1.y - 1),
dark_edge_color);
} else {
draw_list->AddRectFilled(p0, p1, fill_color);
}
if (show_label) {
const ImVec2 text_pos = ImVec2(p0.x + text_offset.x, p0.y + text_offset.y);
if (label_str != "") {
draw_list->AddText(text_pos, label_color, label_str.c_str());
}
}
if (show_time_range) {
// auto str1 = std::to_string(trimmed_range.start_time().to_frames());
// auto str2 =
// std::to_string(trimmed_range.end_time_inclusive().to_frames()); auto pos1
// = ImVec2(p0.x + text_offset.x, p1.y - text_offset.y - font_height); auto
// pos2 = ImVec2(p1.x - text_offset.x - ImGui::CalcTextSize(str2.c_str()).x,
// p1.y - text_offset.y - font_height); draw_list->AddText(pos1,
// label_color, str1.c_str()); draw_list->AddText(pos2, label_color,
// str2.c_str());
auto time_scalar = TimeScalarForItem(item);
auto trimmed_range = item->trimmed_range();
auto start = trimmed_range.start_time();
auto duration = trimmed_range.duration();
auto end = start
+ otio::RationalTime(
duration.value() * time_scalar,
duration.rate());
auto rate = start.rate();
float ruler_y_offset = font_height + text_offset.y;
ImGui::SetCursorPos(
ImVec2(render_pos.x, render_pos.y + ruler_y_offset));
DrawTimecodeRuler(
item + 1,
start,
end,
rate,
time_scalar,
scale,
width,
height - ruler_y_offset);
}
if (ImGui::IsItemHovered()) {
std::string extra;
if (const auto& comp = dynamic_cast<otio::Composition*>(item)) {
extra = "\nChildren: " + std::to_string(comp->children().size());
}
ImGui::SetTooltip(
"%s: %s\nRange: %s - %s\nDuration: %s%s",
item->schema_name().c_str(),
item->name().c_str(),
FormattedStringFromTime(trimmed_range.start_time()).c_str(),
FormattedStringFromTime(trimmed_range.end_time_inclusive()).c_str(),
FormattedStringFromTime(duration).c_str(),
extra.c_str());
}
ImGui::PopClipRect();
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
__items_rendered++;
}
void DrawTransition(
otio::Transition* transition,
float scale,
ImVec2 origin,
float height,
std::map<otio::Composable*, otio::TimeRange>& range_map) {
auto duration = transition->duration();
float width = duration.to_seconds() * scale;
auto range_it = range_map.find(transition);
if (range_it == range_map.end()) {
Log("Couldn't find %s in range map?!", transition->name().c_str());
assert(false);
}
auto item_range = range_it->second;
ImVec2 size(width, height);
ImVec2 render_pos(
item_range.start_time().to_seconds() * scale + origin.x,
ImGui::GetCursorPosY());
ImVec2 text_offset(5.0f, 5.0f);
auto fill_color = appTheme.colors[AppThemeCol_Transition];
auto line_color = appTheme.colors[AppThemeCol_TransitionLine];
auto selected_fill_color = appTheme.colors[AppThemeCol_TransitionSelected];
auto hover_fill_color = appTheme.colors[AppThemeCol_TransitionHovered];
auto old_pos = ImGui::GetCursorPos();
ImGui::SetCursorPos(render_pos);
ImGui::PushID(transition);
ImGui::BeginGroup();
ImGui::InvisibleButton("##Item", size);
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
if (!ImGui::IsRectVisible(p0, p1)) {
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
return;
}
// ImGui::SetItemAllowOverlap();
if (ImGui::IsItemHovered()) {
fill_color = hover_fill_color;
}
if (ImGui::IsItemClicked()) {
SelectObject(transition);
}
if (appState.selected_object == transition) {
fill_color = selected_fill_color;
}
ImGui::PushClipRect(p0, p1, true);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
const ImVec2 line_start = ImVec2(p0.x, p1.y);
const ImVec2 line_end = ImVec2(p1.x, p0.y);
const ImDrawFlags corners_tl_br = ImDrawFlags_RoundCornersTopLeft
| ImDrawFlags_RoundCornersBottomRight;
const float corner_radius = height / 2;
draw_list->AddRectFilled(p0, p1, fill_color, corner_radius, corners_tl_br);
draw_list->AddLine(line_start, line_end, line_color);
if (ImGui::IsItemHovered()) {
ImGui::SetTooltip(
"%s: %s\nIn/Out Offset: %s / %s\nDuration: %s",
transition->schema_name().c_str(),
transition->name().c_str(),
FormattedStringFromTime(transition->in_offset()).c_str(),
FormattedStringFromTime(transition->out_offset()).c_str(),
FormattedStringFromTime(duration).c_str());
}
ImGui::PopClipRect();
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
}
void DrawEffects(
otio::Item* item,
float scale,
ImVec2 origin,
float row_height,
std::map<otio::Composable*, otio::TimeRange>& range_map) {
auto effects = item->effects();
if (effects.size() == 0)
return;
std::string label_str;
for (const auto& effect : effects) {
if (label_str != "")
label_str += ", ";
label_str += effect->name() != "" ? effect->name()
: effect->effect_name();
}
const auto text_size = ImGui::CalcTextSize(label_str.c_str());
ImVec2 text_offset(5.0f, 5.0f);
auto item_duration = item->duration();
float item_width = item_duration.to_seconds() * scale;
float width = fminf(item_width, text_size.x + text_offset.x * 2);
float height = fminf(row_height - 2, text_size.y + text_offset.y * 2);
auto range_it = range_map.find(item);
if (range_it == range_map.end()) {
Log("Couldn't find %s in range map?!", item->name().c_str());
assert(false);
}
auto item_range = range_it->second;
ImVec2 size(width, height*0.75);
// Does the label fit in the available space?
bool label_visible = (size.x > text_size.x && label_str != "");
if (!label_visible) {
// If not, then just put a dot.
size.x = fmin(size.y, width);
}
float item_x = item_range.start_time().to_seconds() * scale + origin.x;
ImVec2 render_pos(
item_x + item_width / 2 - size.x / 2, // centered
ImGui::GetCursorPosY() + row_height / 2 - size.y / 2 // centered
);
auto label_color = appTheme.colors[AppThemeCol_Label];
auto fill_color = appTheme.colors[AppThemeCol_Effect];
auto selected_fill_color = appTheme.colors[AppThemeCol_EffectSelected];
auto hover_fill_color = appTheme.colors[AppThemeCol_EffectHovered];
auto old_pos = ImGui::GetCursorPos();
ImGui::SetCursorPos(render_pos);
ImGui::PushID(item);
ImGui::BeginGroup();
ImGui::InvisibleButton("##Effect", size);
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
if (!ImGui::IsRectVisible(p0, p1)) {
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
return;
}
// ImGui::SetItemAllowOverlap();
if (ImGui::IsItemHovered()) {
fill_color = hover_fill_color;
}
if (effects.size() == 1) {
const auto& effect = effects[0];
if (ImGui::IsItemClicked()) {
SelectObject(effect, item);
}
if (appState.selected_object == effect) {
fill_color = selected_fill_color;
}
} else {
if (ImGui::IsItemClicked()) {
SelectObject(item);
}
if (appState.selected_object == item) {
fill_color = selected_fill_color;
}
}
if (ColorIsBright(fill_color)) {
label_color = ColorInvert(label_color);
}
ImGui::PushClipRect(p0, p1, true);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
draw_list->AddRectFilled(p0, p1, fill_color, 10);
if (label_visible) {
const ImVec2 text_pos = ImVec2(
p0.x + size.x / 2 - text_size.x / 2,
p0.y + size.y / 2 - text_size.y / 2);
draw_list->AddText(text_pos, label_color, label_str.c_str());
}
if (ImGui::IsItemHovered()) {
std::string tooltip;
for (const auto& effect : effects) {
if (tooltip != "")
tooltip += "\n\n";
tooltip += effect->schema_name() + ": " + effect->name();
tooltip += "\nEffect Name: " + effect->effect_name();
if (const auto& timewarp = dynamic_cast<otio::LinearTimeWarp*>(effect.value)) {
tooltip += "\nTime Scale: " + std::to_string(timewarp->time_scalar());
}
}
ImGui::SetTooltip("%s", tooltip.c_str());
}
ImGui::PopClipRect();
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
}
void DrawMarkers(
otio::Item* item,
float scale,
ImVec2 origin,
float height,
std::map<otio::Composable*, otio::TimeRange>& range_map) {
auto markers = item->markers();
if (markers.size() == 0)
return;
auto item_trimmed_start = item->trimmed_range().start_time();
auto item_start_in_parent = otio::RationalTime();
if (item->parent() != NULL) {
auto range_it = range_map.find(item);
if (range_it == range_map.end()) {
Log("Couldn't find %s in range map?!", item->name().c_str());
assert(false);
}
auto item_range = range_it->second;
item_start_in_parent = item_range.start_time();
}
for (const auto& marker : markers) {
auto range = marker->marked_range();
auto duration = range.duration();
auto start = range.start_time();
const float arrow_width = height / 4;
float width = duration.to_seconds() * scale + arrow_width;
ImVec2 size(width, arrow_width);
ImVec2 render_pos(
(item_start_in_parent + (start - item_trimmed_start)).to_seconds()
* scale
+ origin.x - arrow_width / 2,
ImGui::GetCursorPosY());
auto fill_color = UIColorFromName(marker->color());
auto selected_fill_color = appTheme.colors[AppThemeCol_MarkerSelected];
auto hover_fill_color = appTheme.colors[AppThemeCol_MarkerHovered];
auto old_pos = ImGui::GetCursorPos();
ImGui::SetCursorPos(render_pos);
ImGui::PushID(item);
ImGui::BeginGroup();
ImGui::InvisibleButton("##Marker", size);
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
if (!ImGui::IsRectVisible(p0, p1)) {
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
continue;
;
}
// ImGui::SetItemAllowOverlap();
if (ImGui::IsItemHovered()) {
fill_color = hover_fill_color;
}
if (ImGui::IsItemClicked()) {
SelectObject(marker, item);
}
if (appState.selected_object == marker) {
fill_color = selected_fill_color;
}
ImGui::PushClipRect(p0, p1, true);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
auto dimmed_fill_color = ImColor(fill_color);
dimmed_fill_color.Value.w = 0.5;
draw_list->AddTriangleFilled(
ImVec2(p0.x, p0.y),
ImVec2(p0.x + arrow_width / 2, p1.y),
ImVec2(p0.x + arrow_width / 2, p0.y),
fill_color);
draw_list->AddRectFilled(
ImVec2(p0.x + arrow_width / 2, p0.y),
ImVec2(p1.x - arrow_width / 2, p1.y),
ImColor(dimmed_fill_color));
draw_list->AddTriangleFilled(
ImVec2(p1.x - arrow_width / 2, p0.y),
ImVec2(p1.x - arrow_width / 2, p1.y),
ImVec2(p1.x, p0.y),
fill_color);
if (ImGui::IsItemHovered()) {
ImGui::SetTooltip(
"%s: %s\nColor: %s\nRange: %s - %s\nDuration: %s",
marker->schema_name().c_str(),
marker->name().c_str(),
marker->color().c_str(),
FormattedStringFromTime(range.start_time()).c_str(),
FormattedStringFromTime(range.end_time_exclusive()).c_str(),
FormattedStringFromTime(duration).c_str());
}
ImGui::PopClipRect();
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
}
}
void DrawObjectLabel(otio::SerializableObjectWithMetadata* object, float height) {
float width = ImGui::GetContentRegionAvail().x;
ImGui::BeginGroup();
ImGui::AlignTextToFramePadding();
ImVec2 size(width, height);
ImGui::InvisibleButton("##empty", size);
char label_str[200];
snprintf(
label_str,
sizeof(label_str),
"%s: %s",
object->schema_name().c_str(),
object->name().c_str());
auto label_color = appTheme.colors[AppThemeCol_Label];
auto fill_color = appTheme.colors[AppThemeCol_Track];
auto selected_fill_color = appTheme.colors[AppThemeCol_TrackSelected];
auto hover_fill_color = appTheme.colors[AppThemeCol_TrackHovered];
ImVec2 text_offset(5.0f, 5.0f);
if (ImGui::IsItemHovered()) {
fill_color = hover_fill_color;
}
if (ImGui::IsItemClicked()) {
SelectObject(object);
}
if (appState.selected_object == object) {
fill_color = selected_fill_color;
}
if (ColorIsBright(fill_color)) {
label_color = ColorInvert(label_color);
}
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
const ImVec2 text_pos = ImVec2(p0.x + text_offset.x, p0.y + text_offset.y);
ImGui::PushClipRect(p0, p1, true);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
draw_list->AddRectFilled(p0, p1, fill_color);
draw_list->AddText(text_pos, label_color, label_str);
ImGui::PopClipRect();
ImGui::EndGroup();
}
void DrawTrackLabel(otio::Track* track, int index, float height) {
float width = ImGui::GetContentRegionAvail().x;
ImGui::BeginGroup();
ImGui::AlignTextToFramePadding();
ImVec2 size(width, height);
ImGui::InvisibleButton("##empty", size);
std::string kind(track->kind());
if(kind.empty()) {
// fallback when kind is not set
kind = "Other";
}
char label_str[200];
snprintf(
label_str,
sizeof(label_str),
"%c%d: %s",
kind[0],
index,
track->name().c_str());
auto label_color = appTheme.colors[AppThemeCol_Label];
auto fill_color = appTheme.colors[AppThemeCol_Track];
auto selected_fill_color = appTheme.colors[AppThemeCol_TrackSelected];
auto hover_fill_color = appTheme.colors[AppThemeCol_TrackHovered];
auto track_color = GetItemColor(track);
if (track_color != "") {
fill_color = UIColorFromName(track_color);
fill_color = TintedColorForUI(fill_color);
}
ImVec2 text_offset(5.0f, 5.0f);
if (ImGui::IsItemHovered()) {
fill_color = hover_fill_color;
}
if (ImGui::IsItemClicked()) {
SelectObject(track);
}
if (appState.selected_object == track) {
fill_color = selected_fill_color;
}
if (ColorIsBright(fill_color)) {
label_color = ColorInvert(label_color);
}
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
const ImVec2 text_pos = ImVec2(p0.x + text_offset.x, p0.y + text_offset.y);
ImGui::PushClipRect(p0, p1, true);
ImDrawList* draw_list = ImGui::GetWindowDrawList();
draw_list->AddRectFilled(p0, p1, fill_color);
draw_list->AddText(text_pos, label_color, label_str);
ImGui::PopClipRect();
if (ImGui::IsItemHovered()) {
auto trimmed_range = track->trimmed_range();
ImGui::SetTooltip(
"%s: %s\n%s #%d\nRange: %s - %s\nDuration: %s\nChildren: %ld",
track->schema_name().c_str(),
track->name().c_str(),
kind.c_str(),
index,
FormattedStringFromTime(trimmed_range.start_time()).c_str(),
FormattedStringFromTime(trimmed_range.end_time_inclusive()).c_str(),
FormattedStringFromTime(trimmed_range.duration()).c_str(),
track->children().size());
}
ImGui::EndGroup();
}
void DrawTrack(
otio::Track* track,
int index,
float scale,
ImVec2 origin,
float full_width,
float height) {
ImGui::BeginGroup();
otio::ErrorStatus error_status;
auto range_map = track->range_of_all_children(&error_status);
if (otio::is_error(error_status)) {
Message(
"Error calculating timing: %s",
otio_error_string(error_status).c_str());
assert(false);
}
TopLevelTimeRangeMap(range_map, track);
for (const auto& child : track->children()) {
if (const auto& item = dynamic_cast<otio::Item*>(child.value)) {
DrawItem(item, scale, origin, height, range_map);
}
}
for (const auto& child : track->children()) {
if (const auto& transition = dynamic_cast<otio::Transition*>(child.value)) {
DrawTransition(transition, scale, origin, height, range_map);
}
}
for (const auto& child : track->children()) {
if (const auto& item = dynamic_cast<otio::Item*>(child.value)) {
DrawEffects(item, scale, origin, height, range_map);
DrawMarkers(item, scale, origin, height, range_map);
}
}
ImGui::EndGroup();
__tracks_rendered++;
}
void DrawTimecodeRuler(
const void* ptr_id,
otio::RationalTime start,
otio::RationalTime end,
float frame_rate,
float time_scalar,
float zoom_scale,
float width,
float height) {
double scale = zoom_scale / time_scalar;
ImVec2 size(width, height);
ImVec2 text_offset(7.0f, 5.0f);
auto old_pos = ImGui::GetCursorPos();
ImGui::PushID(ptr_id);
ImGui::BeginGroup();
ImGui::Dummy(size);
const ImVec2 p0 = ImGui::GetItemRectMin();
const ImVec2 p1 = ImGui::GetItemRectMax();
ImGui::SetItemAllowOverlap();
if (!ImGui::IsRectVisible(p0, p1)) {
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
return;
}
ImDrawList* draw_list = ImGui::GetWindowDrawList();
auto fill_color = appTheme.colors[AppThemeCol_Background];
auto tick_color = appTheme.colors[AppThemeCol_TickMajor];
// auto tick2_color = appTheme.colors[AppThemeCol_TickMinor];
auto tick_label_color = appTheme.colors[AppThemeCol_Label];
auto zebra_color_dark = ImColor(0, 0, 0, 255.0 * appState.zebra_factor);
auto zebra_color_light = ImColor(255, 255, 255, 255.0 * appState.zebra_factor);
// background
// draw_list->AddRectFilled(p0, p1, fill_color);
// draw every frame?
// Note: "width" implies pixels, but "duration" implies time.
double single_frame_width = scale / frame_rate;
double tick_width = single_frame_width;
double min_tick_width = 15;
if (tick_width < min_tick_width) {
// every second?
tick_width = scale;
if (tick_width < min_tick_width) {
// every minute?
tick_width = scale * 60.0f;
if (tick_width < min_tick_width) {
// every hour
tick_width = scale * 60.0f * 60.0f;
}
}
}
// tick marks - roughly every N pixels
double pixels_per_second = scale;
double seconds_per_tick = tick_width / pixels_per_second;
// ticks must use frame_rate, and must have an integer value
// so that the tick labels align to the human expectation of "frames"
int tick_duration_in_frames = ceil(seconds_per_tick / frame_rate);
int tick_count = ceil(width / tick_width);
// start_floor_time and tick_offset_x adjust the display for cases where
// the item's start_time is not on a whole frame boundary.
auto start_floor_time = otio::RationalTime(floor(start.value()), start.rate());
auto tick_offset = (start - start_floor_time).rescaled_to(frame_rate);
double tick_offset_x = tick_offset.to_seconds() * scale;
// last_label_end_x tracks the tail of the last label, so we can prevent
// overlap
double last_label_end_x = p0.x - text_offset.x * 2;
for (int tick_index = 0; tick_index < tick_count; tick_index++) {
auto tick_time = start.rescaled_to(frame_rate)
+ otio::RationalTime(
tick_index * tick_duration_in_frames,
frame_rate)
- tick_offset;
double tick_x = tick_index * tick_width - tick_offset_x;
const ImVec2 tick_start = ImVec2(p0.x + tick_x, p0.y + height / 2);
const ImVec2 tick_end = ImVec2(tick_start.x + tick_width, p1.y);
if (!ImGui::IsRectVisible(tick_start, tick_end))
continue;
if (seconds_per_tick >= 0.5) {
// draw thin lines at each tick
draw_list->AddLine(
tick_start,
ImVec2(tick_start.x, tick_end.y),
tick_color);
} else {
// once individual frames are visible, draw dark/light stripes instead
int frame = tick_time.to_frames();
const ImVec2 zebra_start = ImVec2(p0.x + tick_x, p0.y);
const ImVec2 zebra_end = ImVec2(tick_start.x + tick_width, p1.y);
draw_list->AddRectFilled(
zebra_start,
zebra_end,
(frame & 1) ? zebra_color_dark : zebra_color_light);
}
const ImVec2 tick_label_pos = ImVec2(p0.x + tick_x + text_offset.x, p0.y + text_offset.y);
// only draw a label when there's room for it
if (tick_label_pos.x > last_label_end_x + text_offset.x) {
std::string tick_label = FormattedStringFromTime(tick_time);
auto label_size = ImGui::CalcTextSize(tick_label.c_str());
draw_list->AddText(
tick_label_pos,
tick_label_color,
tick_label.c_str());
// advance last_label_end_x so nothing will overlap with the one we just
// drew
last_label_end_x = tick_label_pos.x + label_size.x;
}
}
// For debugging, this is very helpful...
// ImGui::SetTooltip("tick_width = %f\nseconds_per_tick =
// %f\npixels_per_second = %f", tick_width, seconds_per_tick,
// pixels_per_second);
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
}
bool DrawTimecodeTrack(
otio::RationalTime start,
otio::RationalTime end,
float frame_rate,
float scale,
float full_width,
float track_height,
bool interactive = true) {
bool moved_playhead = false;
float width = ImGui::GetContentRegionAvail().x;
ImVec2 size(fmaxf(full_width, width), track_height);
auto old_pos = ImGui::GetCursorPos();
ImGui::PushID("##DrawTimecodeTrack");
ImGui::BeginGroup();
if (interactive) {
ImGui::InvisibleButton("##empty", size);
} else {
ImGui::Dummy(size);
}
const ImVec2 p0 = ImGui::GetItemRectMin();
ImGui::SetItemAllowOverlap();
if (interactive && ImGui::IsItemActive()) // &&
// ImGui::IsMouseDragging(ImGuiMouseButton_Left))
{
// MousePos is in SCREEN space
// Subtract p0 which is also in SCREEN space, and includes scrolling, etc.
float mouse_x_widget = ImGui::GetIO().MousePos.x - p0.x;
SeekPlayhead(mouse_x_widget / scale + start.to_seconds());
moved_playhead = true;
}
ImGui::SetCursorPos(old_pos);
DrawTimecodeRuler(
"##TimecodeTrackRuler",
start,
end,
frame_rate,
1.0,
scale,
size.x,
size.y);
ImGui::EndGroup();
ImGui::PopID();
ImGui::SetCursorPos(old_pos);
return moved_playhead;
}
ImColor
ColorOverColor(ImColor a, ImColor b) {
const float alpha = a.Value.w; // for readability
return ImColor(
a.Value.x * alpha + b.Value.x * (1.0 - alpha),
a.Value.y * alpha + b.Value.y * (1.0 - alpha),
a.Value.z * alpha + b.Value.z * (1.0 - alpha),
b.Value.w);
}
float DrawPlayhead(
otio::RationalTime start,
otio::RationalTime end,
otio::RationalTime playhead,
float scale,
float full_width,
float track_height,
float full_height,
ImVec2 origin,
bool draw_arrow) {
float playhead_width = scale / playhead.rate();
float playhead_x = (playhead - start).to_seconds() * scale;
ImVec2 size(playhead_width, full_height);
ImVec2 text_offset(7.0f, 5.0f);
auto background_color = appTheme.colors[AppThemeCol_Background];
auto playhead_fill_color = appTheme.colors[AppThemeCol_Playhead];
auto playhead_line_color = appTheme.colors[AppThemeCol_PlayheadLine];
auto playhead_label_bg_color = ColorOverColor(playhead_fill_color, background_color);
// Ask for this position in the timeline
ImVec2 render_pos(playhead_x + origin.x, origin.y);
auto old_pos = ImGui::GetCursorPos();
ImGui::SetCursorPos(render_pos);
ImGui::PushID("##Playhead");
ImGui::BeginGroup();
ImGui::InvisibleButton("##Playhead2", size);
// Compute where we are rendering in screen space for draw list functions.
ImVec2 p0 = ImGui::GetItemRectMin();
ImVec2 p1 = ImGui::GetItemRectMax();
ImGui::SetItemAllowOverlap();
// compute the playhead x position in the local (aka window) coordinate system
// so that later we can use SetScrollFromPosX() to scroll the timeline.
// p0 is in screen space - where we're actually drawn (which includes current
// scroll) origin is the offset to the edge of the tracks in window space. So
// we compute SCREEN_RENDER_POS.x - LOCAL_EDGE.x - WINDOW_POS.x =>
// LOCAL_RENDER_POS.x float playhead_scroll_x = p0.x - origin.x -
// ImGui::GetWindowPos().x;
float playhead_scroll_x = playhead_x;
if (ImGui::IsItemActive()) // &&
// ImGui::IsMouseDragging(ImGuiMouseButton_Left))
{
// MousePos is in SCREEN space
float mouse_x_widget = ImGui::GetIO().MousePos.x
// Subtract WindowPos to get WINDOW space
- ImGui::GetWindowPos().x
// Subtract origin.x to get TIMELINE space
- origin.x
// Add ScrollX to compensate for scrolling
+ ImGui::GetScrollX();
SeekPlayhead(mouse_x_widget / scale + start.to_seconds());
// Note: Using MouseDelta doesn't work since it is directionally
// biased by playhead snapping, and other factors I don't understand.
// float drag_x = ImGui::GetIO().MouseDelta.x * 0.5f;
// SeekPlayhead(playhead.to_seconds() + drag_x / scale);
}
ImDrawList* draw_list = ImGui::GetWindowDrawList();