action_toolbar.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2019 CERN
 * Copyright (C) 2019-2021 KiCad Developers, see CHANGELOG.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <algorithm>
#include <advanced_config.h>
#include <bitmaps.h>
#include <bitmap_store.h>
#include <eda_draw_frame.h>
#include <functional>
#include <kiplatform/ui.h>
#include <math/util.h>
#include <memory>
#include <pgm_base.h>
#include <settings/common_settings.h>
#include <tool/action_toolbar.h>
#include <tool/actions.h>
#include <tool/tool_action.h>
#include <tool/tool_event.h>
#include <tool/tool_interactive.h>
#include <tool/tool_manager.h>
#include <widgets/bitmap_button.h>
#include <widgets/wx_aui_art_providers.h>
#include <wx/popupwin.h>
#include <wx/renderer.h>
#include <wx/sizer.h>
#include <wx/dcclient.h>
#include <wx/settings.h>


wxBitmap MakeDisabledBitmap( const wxBitmap& aSource )
{
 return aSource.ConvertToDisabled( KIPLATFORM::UI::IsDarkTheme() ? 70 : 255 );
}


ACTION_GROUP::ACTION_GROUP( const std::string& aName,
 const std::vector<const TOOL_ACTION*>& aActions )
{
 wxASSERT_MSG( aActions.size() > 0, "Action groups must have at least one action" );

 // The default action is just the first action in the vector
 m_actions = aActions;
 m_defaultAction = m_actions[0];

 m_name = aName;
 m_id = ACTION_MANAGER::MakeActionId( m_name );
}


int ACTION_GROUP::GetUIId() const
{
 return m_id + TOOL_ACTION::GetBaseUIId();
}


void ACTION_GROUP::SetDefaultAction( const TOOL_ACTION& aDefault )
{
 bool valid = std::any_of( m_actions.begin(), m_actions.end(),
 [&]( const TOOL_ACTION* aAction ) -> bool
 {
 // For some reason, we can't compare the actions directly
 return aAction->GetId() == aDefault.GetId();
 } );

 wxASSERT_MSG( valid, "Action must be present in a group to be the default" );

 m_defaultAction = &aDefault;
}


#define PALETTE_BORDER 4 // The border around the palette buttons on all sides
#define BUTTON_BORDER 1 // The border on the sides of the buttons that touch other buttons


ACTION_TOOLBAR_PALETTE::ACTION_TOOLBAR_PALETTE( wxWindow* aParent, bool aVertical ) :
 wxPopupTransientWindow( aParent, wxBORDER_NONE ),
 m_group( nullptr ),
 m_isVertical( aVertical ),
 m_panel( nullptr ),
 m_mainSizer( nullptr ),
 m_buttonSizer( nullptr )
{
 m_panel = new wxPanel( this, wxID_ANY );
 m_panel->SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) );

 // This sizer holds the buttons for the actions
 m_buttonSizer = new wxBoxSizer( aVertical ? wxVERTICAL : wxHORIZONTAL );

 // This sizer holds the other sizer, so that a consistent border is present on all sides
 m_mainSizer = new wxBoxSizer( aVertical ? wxVERTICAL : wxHORIZONTAL );
 m_mainSizer->Add( m_buttonSizer, wxSizerFlags().Border( wxALL, PALETTE_BORDER ) );

 m_panel->SetSizer( m_mainSizer );

 Connect( wxEVT_CHAR_HOOK, wxCharEventHandler( ACTION_TOOLBAR_PALETTE::onCharHook ),
 nullptr, this );
}


void ACTION_TOOLBAR_PALETTE::AddAction( const TOOL_ACTION& aAction )
{
 wxBitmap normalBmp = KiScaledBitmap( aAction.GetIcon(), this );
 wxBitmap disabledBmp = MakeDisabledBitmap( normalBmp );

 int padding = ( m_buttonSize.GetWidth() - normalBmp.GetWidth() ) / 2;

 BITMAP_BUTTON* button = new BITMAP_BUTTON( m_panel, aAction.GetUIId() );

 button->SetBitmap( normalBmp );
 button->SetDisabledBitmap( disabledBmp );
 button->SetPadding( padding );
 button->SetToolTip( aAction.GetDescription() );
 button->AcceptDragInAsClick();

 m_buttons[aAction.GetUIId()] = button;

 if( m_isVertical )
 m_buttonSizer->Add( button, wxSizerFlags().Border( wxTOP | wxBOTTOM, BUTTON_BORDER ) );
 else
 m_buttonSizer->Add( button, wxSizerFlags().Border( wxLEFT | wxRIGHT, BUTTON_BORDER ) );

 m_buttonSizer->Layout();
}


void ACTION_TOOLBAR_PALETTE::EnableAction( const TOOL_ACTION& aAction, bool aEnable )
{
 auto it = m_buttons.find( aAction.GetUIId() );

 if( it != m_buttons.end() )
 it->second->Enable( aEnable );
}


void ACTION_TOOLBAR_PALETTE::CheckAction( const TOOL_ACTION& aAction, bool aCheck )
{
 auto it = m_buttons.find( aAction.GetUIId() );

 if( it != m_buttons.end() )
 it->second->Check( aCheck );
}


void ACTION_TOOLBAR_PALETTE::Popup( wxWindow* aFocus )
{
 m_mainSizer->Fit( m_panel );
 SetClientSize( m_panel->GetSize() );

 wxPopupTransientWindow::Popup( aFocus );
}


void ACTION_TOOLBAR_PALETTE::onCharHook( wxKeyEvent& aEvent )
{
 // Allow the escape key to dismiss this popup
 if( aEvent.GetKeyCode() == WXK_ESCAPE )
 Dismiss();
 else
 aEvent.Skip();
}


ACTION_TOOLBAR::ACTION_TOOLBAR( EDA_BASE_FRAME* parent, wxWindowID id, const wxPoint& pos,
 const wxSize& size, long style ) :
 wxAuiToolBar( parent, id, pos, size, style ),
 m_paletteTimer( nullptr ),
 m_auiManager( nullptr ),
 m_toolManager( parent->GetToolManager() ),
 m_palette( nullptr )
{
 m_paletteTimer = new wxTimer( this );

#if !wxCHECK_VERSION( 3, 1, 0 )
 // Custom art provider makes dark mode work on wx < 3.1
 WX_AUI_TOOLBAR_ART* newArt = new WX_AUI_TOOLBAR_ART();
 SetArtProvider( newArt );
#endif

 Connect( wxEVT_COMMAND_TOOL_CLICKED, wxAuiToolBarEventHandler( ACTION_TOOLBAR::onToolEvent ),
 nullptr, this );
 Connect( wxEVT_AUITOOLBAR_RIGHT_CLICK,
 wxAuiToolBarEventHandler( ACTION_TOOLBAR::onToolRightClick ),
 nullptr, this );
 Connect( wxEVT_AUITOOLBAR_BEGIN_DRAG, wxAuiToolBarEventHandler( ACTION_TOOLBAR::onItemDrag ),
 nullptr, this );
 Connect( wxEVT_LEFT_DOWN, wxMouseEventHandler( ACTION_TOOLBAR::onMouseClick ), nullptr, this );
 Connect( wxEVT_LEFT_UP, wxMouseEventHandler( ACTION_TOOLBAR::onMouseClick ), nullptr, this );
 Connect( m_paletteTimer->GetId(), wxEVT_TIMER,
 wxTimerEventHandler( ACTION_TOOLBAR::onTimerDone ), nullptr, this );

 Bind( wxEVT_SYS_COLOUR_CHANGED,
 wxSysColourChangedEventHandler( ACTION_TOOLBAR::onThemeChanged ), this );
}


ACTION_TOOLBAR::~ACTION_TOOLBAR()
{
 delete m_paletteTimer;

 // Clear all the maps keeping track of our items on the toolbar
 m_toolMenus.clear();
 m_actionGroups.clear();
 m_toolCancellable.clear();
 m_toolKinds.clear();
 m_toolActions.clear();
}


void ACTION_TOOLBAR::Add( const TOOL_ACTION& aAction, bool aIsToggleEntry, bool aIsCancellable )
{
 wxASSERT( GetParent() );
 wxASSERT_MSG( !( aIsCancellable && !aIsToggleEntry ), "aIsCancellable requires aIsToggleEntry" );

 int toolId = aAction.GetUIId();
 wxBitmap bmp = KiScaledBitmap( aAction.GetIcon(), GetParent() );

 AddTool( toolId, wxEmptyString, bmp, MakeDisabledBitmap( bmp ),
 aIsToggleEntry ? wxITEM_CHECK : wxITEM_NORMAL,
 aAction.GetDescription(), wxEmptyString, nullptr );

 m_toolKinds[ toolId ] = aIsToggleEntry;
 m_toolActions[ toolId ] = &aAction;
 m_toolCancellable[ toolId ] = aIsCancellable;
}


void ACTION_TOOLBAR::AddButton( const TOOL_ACTION& aAction )
{
 int toolId = aAction.GetUIId();
 wxBitmap bmp = KiScaledBitmap( aAction.GetIcon(), GetParent() );

 AddTool( toolId, wxEmptyString, bmp, MakeDisabledBitmap( bmp ),
 wxITEM_NORMAL, aAction.GetDescription(), wxEmptyString, nullptr );

 m_toolKinds[ toolId ] = false;
 m_toolActions[ toolId ] = &aAction;
}


void ACTION_TOOLBAR::AddScaledSeparator( wxWindow* aWindow )
{
 int scale = Pgm().GetCommonSettings()->m_Appearance.icon_scale;

 if( scale == 0 )
 scale = KiIconScale( aWindow );

 if( scale > 4 )
 AddSpacer( 16 * ( scale - 4 ) / 4 );

 AddSeparator();

 if( scale > 4 )
 AddSpacer( 16 * ( scale - 4 ) / 4 );
}


void ACTION_TOOLBAR::AddToolContextMenu( const TOOL_ACTION& aAction,
 std::unique_ptr<ACTION_MENU> aMenu )
{
 int toolId = aAction.GetUIId();

 m_toolMenus[toolId] = std::move( aMenu );
}


void ACTION_TOOLBAR::AddGroup( ACTION_GROUP* aGroup, bool aIsToggleEntry )
{
 int groupId = aGroup->GetUIId();
 const TOOL_ACTION* defaultAction = aGroup->GetDefaultAction();
 wxBitmap bmp = KiScaledBitmap( defaultAction->GetIcon(), GetParent() );

 wxASSERT( GetParent() );
 wxASSERT( defaultAction );

 m_toolKinds[ groupId ] = aIsToggleEntry;
 m_toolActions[ groupId ] = defaultAction;
 m_actionGroups[ groupId ] = aGroup;

 // Add the main toolbar item representing the group
 AddTool( groupId, wxEmptyString, bmp, MakeDisabledBitmap( bmp ),
 aIsToggleEntry ? wxITEM_CHECK : wxITEM_NORMAL,
 wxEmptyString, wxEmptyString, nullptr );

 // Select the default action
 doSelectAction( aGroup, *defaultAction );
}


void ACTION_TOOLBAR::SelectAction( ACTION_GROUP* aGroup, const TOOL_ACTION& aAction )
{
 bool valid = std::any_of( aGroup->m_actions.begin(), aGroup->m_actions.end(),
 [&]( const TOOL_ACTION* action2 ) -> bool
 {
 // For some reason, we can't compare the actions directly
 return aAction.GetId() == action2->GetId();
 } );

 if( valid )
 doSelectAction( aGroup, aAction );
}


void ACTION_TOOLBAR::doSelectAction( ACTION_GROUP* aGroup, const TOOL_ACTION& aAction )
{
 wxASSERT( GetParent() );

 int groupId = aGroup->GetUIId();

 wxAuiToolBarItem* item = FindTool( groupId );

 if( !item )
 return;

 // Update the item information
 item->SetShortHelp( aAction.GetDescription() );
 item->SetBitmap( KiScaledBitmap( aAction.GetIcon(), GetParent() ) );
 item->SetDisabledBitmap( MakeDisabledBitmap( item->GetBitmap() ) );

 // Register a new handler with the new UI conditions
 if( m_toolManager )
 {
 const ACTION_CONDITIONS* cond = m_toolManager->GetActionManager()->GetCondition( aAction );

 wxASSERT_MSG( cond, wxString::Format( "Missing UI condition for action %s",
 aAction.GetName() ) );

 m_toolManager->GetToolHolder()->UnregisterUIUpdateHandler( groupId );
 m_toolManager->GetToolHolder()->RegisterUIUpdateHandler( groupId, *cond );
 }

 // Update the currently selected action
 m_toolActions[ groupId ] = &aAction;

 Refresh();
}


void ACTION_TOOLBAR::UpdateControlWidth( int aID )
{
 wxAuiToolBarItem* item = FindTool( aID );
 wxASSERT_MSG( item, wxString::Format( "No toolbar item found for ID %d", aID ) );

 // The control on the toolbar is stored inside the window field of the item
 wxControl* control = dynamic_cast<wxControl*>( item->GetWindow() );
 wxASSERT_MSG( control, wxString::Format( "No control located in toolbar item with ID %d", aID ) );

 // Update the size the item has stored using the best size of the control
 wxSize bestSize = control->GetBestSize();
 item->SetMinSize( bestSize );

 // Update the sizer item sizes
 // This is a bit convoluted because there are actually 2 sizers that need to be updated:
 // 1. The main sizer that is used for the entire toolbar (this sizer item can be found in the
 // toolbar item)
 if( wxSizerItem* szrItem = item->GetSizerItem() )
 szrItem->SetMinSize( bestSize );

 // 2. The controls have a second sizer that allows for padding above/below the control with
 // stretch space, so we also need to update the sizer item for the control in that sizer with
 // the new size. We let wx do the search for us, since SetItemMinSize is recursive and will
 // locate the control on that sizer.
 if( m_sizer )
 {
 m_sizer->SetItemMinSize( control, bestSize );

 // Now actually update the toolbar with the new sizes
 m_sizer->Layout();
 }
}


void ACTION_TOOLBAR::ClearToolbar()
{
 // Clear all the maps keeping track of our items on the toolbar
 m_toolMenus.clear();
 m_actionGroups.clear();
 m_toolCancellable.clear();
 m_toolKinds.clear();
  m_toolActions.clear();

 // Remove the actual tools from the toolbar
 Clear();
}


void ACTION_TOOLBAR::SetToolBitmap( const TOOL_ACTION& aAction, const wxBitmap& aBitmap )
{
 int toolId = aAction.GetUIId();
 wxAuiToolBar::SetToolBitmap( toolId, aBitmap );

 // Set the disabled bitmap: we use the disabled bitmap version of aBitmap.
 wxAuiToolBarItem* tb_item = wxAuiToolBar::FindTool( toolId );

 if( tb_item )
 tb_item->SetDisabledBitmap( MakeDisabledBitmap( aBitmap ) );
}


void ACTION_TOOLBAR::Toggle( const TOOL_ACTION& aAction, bool aState )
{
 int toolId = aAction.GetUIId();

 if( m_toolKinds[ toolId ] )
 ToggleTool( toolId, aState );
 else
 EnableTool( toolId, aState );
}


void ACTION_TOOLBAR::Toggle( const TOOL_ACTION& aAction, bool aEnabled, bool aChecked )
{
 int toolId = aAction.GetUIId();

 EnableTool( toolId, aEnabled );
 ToggleTool( toolId, aEnabled && aChecked );
}


void ACTION_TOOLBAR::onToolEvent( wxAuiToolBarEvent& aEvent )
{
 int id = aEvent.GetId();
 wxEventType type = aEvent.GetEventType();
 OPT_TOOL_EVENT evt;

 bool handled = false;

 if( m_toolManager && type == wxEVT_COMMAND_TOOL_CLICKED && id >= TOOL_ACTION::GetBaseUIId() )
 {
 const auto actionIt = m_toolActions.find( id );

 // The toolbar item is toggled before the event is sent, so we check for it not being
 // toggled to see if it was toggled originally
 if( m_toolCancellable[id] && !GetToolToggled( id ) )
 {
 // Send a cancel event
 m_toolManager->CancelTool();
 handled = true;
 }
 else if( actionIt != m_toolActions.end() )
 {
 // Dispatch a tool event
 evt = actionIt->second->MakeEvent();
 evt->SetHasPosition( false );
 m_toolManager->ProcessEvent( *evt );
 m_toolManager->GetToolHolder()->RefreshCanvas();
 handled = true;
 }
 }

 // Skip the event if we don't handle it
 if( !handled )
 aEvent.Skip();
}


void ACTION_TOOLBAR::onToolRightClick( wxAuiToolBarEvent& aEvent )
{
 int toolId = aEvent.GetToolId();

 // This means the event was not on a button
 if( toolId == -1 )
 return;

 // Ensure that the ID used maps to a proper tool ID.
 // If right-clicked on a group item, this is needed to get the ID of the currently selected
 // action, since the event's ID is that of the group.
 const auto actionIt = m_toolActions.find( toolId );

 if( actionIt != m_toolActions.end() )
 toolId = actionIt->second->GetUIId();

 // Find the menu for the action
 const auto menuIt = m_toolMenus.find( toolId );

 if( menuIt == m_toolMenus.end() )
 return;

 // Update and show the menu
 std::unique_ptr<ACTION_MENU>& owningMenu = menuIt->second;

 // Get the actual menu pointer to show it
 ACTION_MENU* menu = owningMenu.get();
 SELECTION dummySel;

 if( CONDITIONAL_MENU* condMenu = dynamic_cast<CONDITIONAL_MENU*>( menu ) )
 condMenu->Evaluate( dummySel );

 menu->UpdateAll();
 PopupMenu( menu );

 // Remove hovered item when the menu closes, otherwise it remains hovered even if the
 // mouse is not on the toolbar
 SetHoverItem( nullptr );
}

// The time (in milliseconds) between pressing the left mouse button and opening the palette
#define PALETTE_OPEN_DELAY 500


void ACTION_TOOLBAR::onMouseClick( wxMouseEvent& aEvent )
{
 wxAuiToolBarItem* item = FindToolByPosition( aEvent.GetX(), aEvent.GetY() );

 if( item )
 {
 // Ensure there is no active palette
 if( m_palette )
 {
 m_palette->Hide();
 m_palette->Destroy();
 m_palette = nullptr;
 }

 // Start the popup conditions if it is a left mouse click and the tool clicked is a group
 if( aEvent.LeftDown() && ( m_actionGroups.find( item->GetId() ) != m_actionGroups.end() ) )
 m_paletteTimer->StartOnce( PALETTE_OPEN_DELAY );

 // Clear the popup conditions if it is a left up, because that implies a click happened
 if( aEvent.LeftUp() )
 m_paletteTimer->Stop();
 }

 // Skip the event so wx can continue processing the mouse event
 aEvent.Skip();
}


void ACTION_TOOLBAR::onItemDrag( wxAuiToolBarEvent& aEvent )
{
 int toolId = aEvent.GetToolId();

 if( m_actionGroups.find( toolId ) != m_actionGroups.end() )
 {
 wxAuiToolBarItem* item = FindTool( toolId );

 // Use call after because opening the palette from a mouse handler
 // creates a weird mouse state that causes problems on OSX.
 CallAfter( &ACTION_TOOLBAR::popupPalette, item );

 // Don't skip this event since we are handling it
 return;
 }

 // Skip since we don't care about it
 aEvent.Skip();
}


void ACTION_TOOLBAR::onTimerDone( wxTimerEvent& aEvent )
{
 // We need to search for the tool using the client coordinates
 wxPoint mousePos = ScreenToClient( wxGetMousePosition() );

 wxAuiToolBarItem* item = FindToolByPosition( mousePos.x, mousePos.y );

 if( item )
 popupPalette( item );
}


void ACTION_TOOLBAR::onPaletteEvent( wxCommandEvent& aEvent )
{
 if( !m_palette )
 return;

 OPT_TOOL_EVENT evt;
 ACTION_GROUP* group = m_palette->GetGroup();

 // Find the action corresponding to the button press
 auto actionIt = std::find_if( group->GetActions().begin(), group->GetActions().end(),
 [=]( const TOOL_ACTION* aAction )
 {
 return aAction->GetUIId() == aEvent.GetId();
 } );

 if( actionIt != group->GetActions().end() )
 {
 const TOOL_ACTION* action = *actionIt;

 // Dispatch a tool event
 evt = action->MakeEvent();
 evt->SetHasPosition( false );
 m_toolManager->ProcessEvent( *evt );
 m_toolManager->GetToolHolder()->RefreshCanvas();

 // Update the main toolbar item with the selected action
 doSelectAction( group, *action );
 }

 // Hide the palette
 m_palette->Hide();
 m_palette->Destroy();
 m_palette = nullptr;
}


void ACTION_TOOLBAR::popupPalette( wxAuiToolBarItem* aItem )
{
 // Clear all popup conditions
 m_paletteTimer->Stop();

 wxWindow* toolParent = dynamic_cast<wxWindow*>( m_toolManager->GetToolHolder() );

 wxASSERT( GetParent() );
 wxASSERT( m_auiManager );
 wxASSERT( toolParent );

 // Ensure the item we are using for the palette has a group associated with it.
 const auto it = m_actionGroups.find( aItem->GetId() );

 if( it == m_actionGroups.end() )
 return;

 ACTION_GROUP* group = it->second;

 wxAuiPaneInfo& pane = m_auiManager->GetPane( this );

 // We use the size of the toolbar items for our palette buttons
 wxRect toolRect = GetToolRect( aItem->GetId() );

 // The position for the palette window must be in screen coordinates
 wxPoint pos( ClientToScreen( toolRect.GetPosition() ) );

 // True for vertical buttons, false for horizontal
 bool dir = true;
 size_t numActions = group->m_actions.size();

 // The size of the palette in the long dimension
 int paletteLongDim = ( 2 * PALETTE_BORDER ) // The border on all sides of the buttons
 + ( BUTTON_BORDER ) // The border on the start of the buttons
 + ( numActions * BUTTON_BORDER ) // The other button borders
 + ( numActions * toolRect.GetHeight() ); // The size of the buttons

 // Determine the position of the top left corner of the palette window
 switch( pane.dock_direction )
 {
 case wxAUI_DOCK_TOP:
 // Top toolbars need to shift the palette window down by the toolbar padding
 dir = true; // Buttons are vertical in the palette
 pos = ClientToScreen( toolRect.GetBottomLeft() );
 pos += wxPoint( -PALETTE_BORDER, // Shift left to align the button edges
 m_bottomPadding ); // Shift down to move away from the toolbar
 break;

 case wxAUI_DOCK_BOTTOM:
 // Bottom toolbars need to shift the palette window up by its height (all buttons +
 // border + toolbar padding)
 dir = true; // Buttons are vertical in the palette
 pos = ClientToScreen( toolRect.GetTopLeft() );
 pos += wxPoint( -PALETTE_BORDER, // Shift left to align the button
 // Shift up by the entire length of the palette.
 -( paletteLongDim + m_topPadding ) );
 break;

 case wxAUI_DOCK_LEFT:
 // Left toolbars need to shift the palette window up by the toolbar padding
 dir = false; // Buttons are horizontal in the palette
 pos = ClientToScreen( toolRect.GetTopRight() );
 pos += wxPoint( m_rightPadding, // Shift right to move away from the toolbar
 -( PALETTE_BORDER ) ); // Shift up to align the button tops
 break;

 case wxAUI_DOCK_RIGHT:
 // Right toolbars need to shift the palette window left by its width (all buttons +
 // border + toolbar padding)
 dir = false; // Buttons are horizontal in the palette
 pos = ClientToScreen( toolRect.GetTopLeft() );

 // Shift left by the entire length of the palette.
 pos += wxPoint( -( paletteLongDim + m_leftPadding ),
 -( PALETTE_BORDER ) ); // Shift up to align the button
 break;
 }

 m_palette = new ACTION_TOOLBAR_PALETTE( GetParent(), dir );

 // We handle the button events in the toolbar class, so connect the right handler
 m_palette->SetGroup( group );
 m_palette->SetButtonSize( toolRect );
 m_palette->Connect( wxEVT_BUTTON, wxCommandEventHandler( ACTION_TOOLBAR::onPaletteEvent ),
 nullptr, this );


 // Add the actions in the group to the palette and update their enabled state
 // We purposely don't check items in the palette
 for( const TOOL_ACTION* action : group->m_actions )
 {
 wxUpdateUIEvent evt( action->GetUIId() );

 toolParent->ProcessWindowEvent( evt );

 m_palette->AddAction( *action );

 if( evt.GetSetEnabled() )
 m_palette->EnableAction( *action, evt.GetEnabled() );
 }

 // Release the mouse to ensure the first click will be recognized in the palette
 ReleaseMouse();

 m_palette->SetPosition( pos );
 m_palette->Popup();

 // Clear the mouse state on the toolbar because otherwise wxWidgets gets confused
 // and won't properly display any highlighted items after the palette is closed.
 // (This is the equivalent of calling the DoResetMouseState() private function)
 RefreshOverflowState();
 SetHoverItem( nullptr );
 SetPressedItem( nullptr );

 m_dragging = false;
 m_tipItem = nullptr;
 m_actionPos = wxPoint( -1, -1 );
 m_actionItem = nullptr;
}


void ACTION_TOOLBAR::OnCustomRender(wxDC& aDc, const wxAuiToolBarItem& aItem, const wxRect& aRect )
{
 auto it = m_actionGroups.find( aItem.GetId() );

 if( it == m_actionGroups.end() )
 return;

 // Choose the color to draw the triangle
 wxColour clr;

 if( aItem.GetState() & wxAUI_BUTTON_STATE_DISABLED )
 clr = wxSystemSettings::GetColour( wxSYS_COLOUR_GRAYTEXT );
 else
 clr = wxSystemSettings::GetColour( wxSYS_COLOUR_BTNTEXT );

 // Must set both the pen (for the outline) and the brush (for the polygon fill)
 aDc.SetPen( wxPen( clr ) );
 aDc.SetBrush( wxBrush( clr ) );

 // Make the side length of the triangle approximately 1/5th of the bitmap
 int sideLength = KiROUND( aRect.height / 5.0 );

 // This will create a triangle with its point at the bottom right corner,
 // and its other two corners along the right and bottom sides
 wxPoint btmRight = aRect.GetBottomRight();
 wxPoint topCorner( btmRight.x, btmRight.y - sideLength );
 wxPoint btmCorner( btmRight.x - sideLength, btmRight.y );

 wxPointList points;
 points.Append( &btmRight );
 points.Append( &topCorner );
 points.Append( &btmCorner );

 aDc.DrawPolygon( &points );
}


bool ACTION_TOOLBAR::KiRealize()
{
 wxClientDC dc( this );

 if( !dc.IsOk() )
 return false;

 // calculate hint sizes for both horizontal and vertical
 // in the order that leaves toolbar in correct final state

 // however, skip calculating alternate orientations if we don't need them due to window style
 bool retval = true;

 if( m_orientation == wxHORIZONTAL )
 {
 if( !( GetWindowStyle() & wxAUI_TB_HORIZONTAL ) )
 {
 m_vertHintSize = GetSize();
 retval = RealizeHelper( dc, false );
 }

 if( retval && RealizeHelper( dc, true ) )
 {
 m_horzHintSize = GetSize();
 }
 else
 {
 retval = false;
 }
 }
 else
 {
 if( !( GetWindowStyle() & wxAUI_TB_VERTICAL ) )
 {
 m_horzHintSize = GetSize();
 retval = RealizeHelper( dc, true );
 }

 if( retval && RealizeHelper( dc, false ) )
 {
 m_vertHintSize = GetSize();
 }
 else
 {
 retval = false;
 }
 }

 Refresh( false );
 return retval;
}


void ACTION_TOOLBAR::onThemeChanged( wxSysColourChangedEvent &aEvent )
{
 GetBitmapStore()->ThemeChanged();
 RefreshBitmaps();

 aEvent.Skip();
}


void ACTION_TOOLBAR::RefreshBitmaps()
{
 for( const std::pair<int, const TOOL_ACTION*> pair : m_toolActions )
 {
 wxAuiToolBarItem* tool = FindTool( pair.first );

 wxBitmap bmp = KiScaledBitmap( pair.second->GetIcon(), GetParent() );

 tool->SetBitmap( bmp );
 tool->SetDisabledBitmap( MakeDisabledBitmap( bmp ) );
 }

 Refresh();
}