346 lines
10 KiB
C++
346 lines
10 KiB
C++
#include "externals.hh"
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#include "syncview.hh"
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#include "globals.hh"
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#include "window.hh"
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#define IMGUI_DEFINE_MATH_OPERATORS
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#include <imgui_internal.h>
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using namespace ebcl;
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/*= T_SyncViewImpl_ ============================================================*/
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namespace {
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struct T_SyncViewImpl_
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{
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static constexpr float SeqHeaderHeight = 24;
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static constexpr float BarWidth = 40;
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const uint32_t ColFrame{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , .8 } ) };
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const uint32_t ColHeader{ ImGui::GetColorU32( ImVec4{ .5 , .5 , .5 , .8 } ) };
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const uint32_t ColHeaderText{ ImGui::GetColorU32( ImVec4{ 0 , 0 , 0 , 1 } ) };
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const uint32_t ColMain{ ImGui::GetColorU32( ImVec4{ .4 , .4 , .4 , .8 } ) };
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const uint32_t ColSelection{ ImGui::GetColorU32( ImVec4{ .8 , 1 , .8 , .2 } ) };
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float zoomLevel{ 0.f };
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float startPos{ 0.f };
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bool followTime{ true };
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bool display( ) noexcept;
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void computeMetrics( float innerWidth ) noexcept;
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void sequencerWidget( ) noexcept;
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void sequencerHeader( ImRect const& bb ) noexcept;
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void sequencerBody( ImRect const& bb ) noexcept;
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// Computed metrics
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float barWidth;
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float cursorPos;
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uint32_t startBar;
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float startBarPos;
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float timePerBar;
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float totalPixels;
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float startPixel;
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// Zoom area selection
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bool zoomInProgress{ false };
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bool justZoomed{ false };
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float firstZoomPixel;
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float curZoomPixel;
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};
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constexpr float T_SyncViewImpl_::BarWidth;
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bool T_SyncViewImpl_::display( ) noexcept
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{
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using namespace ImGui;
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auto const& dspSize( GetIO( ).DisplaySize );
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auto& sync( Globals::Sync( ) );
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// Window set-up
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SetNextWindowSize( ImVec2( dspSize.x , 150 ) , ImGuiSetCond_Appearing );
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SetNextWindowPos( ImVec2( 0 , dspSize.y - 150 ) , ImGuiSetCond_Appearing );
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bool displayed{ true };
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Begin( "Sequencer" , &displayed , ImGuiWindowFlags_NoCollapse
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| ImGuiWindowFlags_NoScrollWithMouse );
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if ( !displayed ) {
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End( );
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return false;
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}
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PushItemWidth( 100 );
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SliderFloat( "##zoom" , &zoomLevel , 0 , 1 , "%.2f" );
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if ( IsItemHovered( ) ) {
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BeginTooltip( );
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Text( "Zoom level" );
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EndTooltip( );
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}
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PopItemWidth( );
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SameLine( );
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Checkbox( "##follow" , &followTime );
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if ( IsItemHovered( ) ) {
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BeginTooltip( );
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Text( "Follow cursor" );
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EndTooltip( );
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}
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SameLine( );
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PushID( "playing" );
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if ( Button( sync.playing( ) ? "Stop" : "Play" ) ) {
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sync.playing( ) = !sync.playing( ) && !sync.finished( );
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}
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PopID( );
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const float d( sync.duration( ) );
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float tm( sync.time( ) );
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SameLine( );
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PushID( "sequencer" );
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PushItemWidth( -1 );
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if ( SliderFloat( "" , &tm , 0 , d , "%.1fs" ) ) {
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sync.setTime( tm );
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sync.playing( ) = sync.playing( ) && !sync.finished( );
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}
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PopItemWidth( );
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PopID( );
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PushItemWidth( -1 );
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sequencerWidget( );
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PopItemWidth( );
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End( );
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return true;
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}
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void T_SyncViewImpl_::sequencerWidget( ) noexcept
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{
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using namespace ImGui;
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const auto width{ CalcItemWidth( ) };
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auto* const win( GetCurrentWindow( ) );
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const auto seqId{ win->GetID( "##sequencer" ) };
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const ImVec2 cPos( win->DC.CursorPos );
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const ImVec2 ws( GetWindowContentRegionMax( ) );
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auto& style( ImGui::GetStyle( ) );
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const ImRect bbHeader{ cPos , cPos + ImVec2( width , SeqHeaderHeight ) };
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const ImRect bbDisplay{ ImVec2{ cPos.x , bbHeader.Max.y } ,
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ImVec2{ cPos.x + width , GetWindowPos( ).y + ws.y - style.FramePadding.y } };
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const ImRect bbAll{ bbHeader.Min , bbDisplay.Max };
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ItemSize( bbAll , style.FramePadding.y );
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if ( !ItemAdd( bbAll , seqId ) ) {
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return;
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}
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const bool hovered{ ItemHoverable( bbAll , seqId ) };
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computeMetrics( std::max( 0.f , width - 2.f ) );
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BeginGroup( );
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const auto hdrId{ win->GetID( "##header" ) };
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const auto dspId{ win->GetID( "##display" ) };
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PushID( seqId );
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if ( ItemAdd( bbHeader , hdrId ) ) {
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PushID( hdrId );
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sequencerHeader( bbHeader );
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PopID( );
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}
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if ( bbDisplay.Min.y < bbDisplay.Max.y && ItemAdd( bbDisplay , dspId ) ) {
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PushID( dspId );
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sequencerBody( bbDisplay );
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PopID( );
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}
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PopID( );
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auto& io( GetIO( ) );
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if ( hovered && ( io.MouseDown[ 0 ] || io.MouseDown[ 1 ] ) ) {
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SetActiveID( seqId , win );
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FocusWindow( win );
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}
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const bool active( GetCurrentContext( )->ActiveId == seqId );
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if ( active ) {
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if ( io.MouseDown[ 0 ] ) {
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const float p{ io.MousePos.x - bbAll.Min.x + startPixel };
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auto& sync( Globals::Sync( ) );
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sync.setTime( p * Globals::Sync( ).duration( ) / totalPixels );
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}
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if ( io.MouseDown[ 1 ] ) {
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const float p{ io.MousePos.x - bbAll.Min.x + startPixel };
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if ( !zoomInProgress ) {
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firstZoomPixel = p;
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zoomInProgress = true;
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}
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curZoomPixel = p;
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} else if ( zoomInProgress ) {
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zoomInProgress = false;
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justZoomed = true;
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const auto zMin{ std::min( firstZoomPixel , curZoomPixel ) } ,
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zMax{ std::max( firstZoomPixel , curZoomPixel ) } ,
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diff{ zMax - zMin };
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if ( diff > 4 ) {
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auto& sync( Globals::Sync( ) );
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const float u( sync.durationUnits( ) );
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startPos = zMin * u / totalPixels;
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if ( ( width - 2.f ) / u >= BarWidth ) {
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zoomLevel = 0;
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} else {
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const auto length{ std::min( u , diff * u / totalPixels ) };
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const auto ppu{ std::min( ( width - 2 ) / length , BarWidth ) };
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zoomLevel = ( ppu - BarWidth ) / ( BarWidth - width / u ) + 1;
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}
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}
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}
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if ( !( io.MouseDown[ 0 ] || io.MouseDown[ 1 ] ) ) {
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ClearActiveID( );
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}
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}
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EndGroup( );
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}
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void T_SyncViewImpl_::computeMetrics(
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const float innerWidth ) noexcept
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{
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auto& sync( Globals::Sync( ) );
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const uint32_t units{ sync.durationUnits( ) };
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zoomLevel = ImSaturate( zoomLevel );
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const float zoom1Pixels{ std::max( units * BarWidth , innerWidth ) };
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totalPixels = zoomLevel * ( zoom1Pixels - innerWidth ) + innerWidth;
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const uint32_t totalBars{ [=](){
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const float b{ std::max( std::min( totalPixels / BarWidth , float( units ) ) , 1.f ) };
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const float mod{ fmod( b , 1.f ) };
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return uint32_t( b + ( mod ? ( 1 - mod ) : 0 ) );
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}() };
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const float unitsPerBar{ float( units ) / totalBars };
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barWidth = totalPixels / totalBars;
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const float absCursorPos{ sync.time( ) * totalPixels / sync.duration( ) };
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if ( followTime ) {
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const float dispUnits{ innerWidth * units / totalPixels };
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const float uSize{ sync.durationUnitSize( ) };
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const float endPos{ std::min( startPos + dispUnits , float( units ) ) };
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startPos = endPos - dispUnits;
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const float spp{ startPos * totalPixels / units };
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const float epp{ endPos * totalPixels / units };
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if ( absCursorPos < spp || absCursorPos > epp ) {
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if ( justZoomed ) {
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followTime = false;
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} else {
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startPos = std::max( 0.f , sync.time( ) / uSize - unitsPerBar * .5f );
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}
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}
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}
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const float unadjustedStartPixel{ totalPixels * startPos / units };
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if ( unadjustedStartPixel + innerWidth > totalPixels ) {
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startPos = std::max( 0.f , totalPixels - innerWidth );
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}
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startPixel = totalPixels * startPos / units;
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startBar = [=](){
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const float b{ startPixel * totalBars / totalPixels };
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const float mod{ fmod( b , 1.f ) };
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return uint32_t( std::max( 0 , int32_t( b - ( mod ? mod : 1 ) ) ) );
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}();
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startBarPos = startBar * barWidth - startPixel;
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cursorPos = absCursorPos - startPixel;
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timePerBar = unitsPerBar * sync.durationUnitSize( );
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assert( startBarPos <= 0 );
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assert( totalPixels >= innerWidth );
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justZoomed = false;
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}
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void T_SyncViewImpl_::sequencerHeader(
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ImRect const& bb ) noexcept
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{
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using namespace ImGui;
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auto* const dl( GetWindowDrawList( ) );
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const ImRect inner{ bb.Min + ImVec2{ 1 , 1 } , bb.Max - ImVec2{ 1 , 1 } };
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dl->AddRectFilled( inner.Min , inner.Max , ColHeader );
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dl->AddRect( bb.Min , bb.Max , ColFrame );
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if ( cursorPos >= 0 && cursorPos <= inner.GetWidth( ) ) {
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auto* const dl( GetWindowDrawList( ) );
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dl->AddLine( inner.Min + ImVec2{ cursorPos , 0 } ,
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ImVec2{ inner.Min.x + cursorPos , inner.Max.y - 1 } ,
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GetColorU32( ImVec4{ 1 , 1 , 1 , .5 } ) );
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}
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PushFont( Globals::Window( ).smallFont( ) );
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PushStyleColor( ImGuiCol_Text , ColHeaderText );
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auto pos{ startBarPos };
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auto bar{ startBar };
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const auto max{ bb.GetWidth( ) + barWidth - 2.f };
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char buffer[ 12 ];
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while ( pos < max ) {
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const ImVec2 taStart{ inner.Min + ImVec2{ pos - barWidth * .5f , 0 } };
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const ImVec2 taEnd{ taStart + ImVec2{ barWidth , inner.Max.y - inner.Min.y } };
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const float time{ bar * timePerBar };
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const float msf{ fmod( time , 1.f ) };
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const float sf{ fmod( time - msf , 60.f ) };
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snprintf( buffer , sizeof( buffer ) , "%02d:%02d.%03d" ,
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uint32_t( ( time - msf - sf ) / 60.f ) ,
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uint32_t( sf ) , uint32_t( msf * 1000.f ) );
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RenderTextClipped( taStart , taEnd , buffer , nullptr , nullptr ,
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ImVec2{ .5f , .2f + ( ( bar % 2 ) ? .6f : 0.f ) } , &inner );
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pos += barWidth;
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bar ++;
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}
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PopStyleColor( );
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PopFont( );
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}
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void T_SyncViewImpl_::sequencerBody(
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ImRect const& bb ) noexcept
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{
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using namespace ImGui;
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auto* const dl( GetWindowDrawList( ) );
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const ImRect inner{ bb.Min + ImVec2{ 1 , 1 } , bb.Max - ImVec2{ 1 , 1 } };
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dl->AddRectFilled( inner.Min , inner.Max , ColMain );
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dl->AddRect( bb.Min , bb.Max , ColFrame );
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if ( zoomInProgress ) {
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const float z0{ ImClamp( firstZoomPixel - startPixel + inner.Min.x , inner.Min.x , inner.Max.x ) } ,
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z1{ ImClamp( curZoomPixel - startPixel + bb.Min.x , inner.Min.x , inner.Max.x ) };
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const float zMin{ std::min( z0 , z1 ) } , zMax{ std::max( z0 , z1 ) };
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if ( zMin != zMax ) {
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dl->AddRectFilled( ImVec2{ zMin , inner.Min.y } ,
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ImVec2{ zMax , inner.Max.y } ,
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ColSelection );
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}
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}
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auto pos{ startBarPos };
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auto bar{ startBar };
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const auto max{ bb.GetWidth( ) + barWidth - 2.f };
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while ( pos < max ) {
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if ( pos >= 0 && pos < inner.GetWidth( ) ) {
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dl->AddLine( bb.Min + ImVec2{ pos , 0 } ,
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ImVec2{ inner.Min.x + pos , inner.Max.y } ,
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0xff000000 );
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}
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pos += barWidth;
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bar ++;
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}
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if ( cursorPos >= 0 && cursorPos <= inner.GetWidth( ) ) {
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auto* const dl( GetWindowDrawList( ) );
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dl->AddLine( inner.Min + ImVec2{ cursorPos , -1 } ,
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ImVec2{ inner.Min.x + cursorPos , inner.Max.y - 1 } ,
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0xffffffff );
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}
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}
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} // namespace
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/*= T_SyncView =================================================================*/
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T_SyncView::T_SyncView( ) noexcept
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: A_PrivateImplementation( new T_SyncViewImpl_( ) )
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{ }
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bool T_SyncView::display( ) noexcept
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{
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return p< T_SyncViewImpl_ >( ).display( );
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}
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