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Redraw only wxPGProperties within update region

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Currently all properties within client area are processed for drawing whether they lie inside the update region or not. Processing for drawing is an expensive operation so doing this only for properties being actually repainted should improve performance.
This commit is contained in:
Artur Wieczorek
2018-10-12 22:46:20 +02:00
parent b894ea1ce3
commit 09ff7edfbe
1 changed files with 21 additions and 22 deletions
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43
src/propgrid/propgrid.cpp
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@@ -1861,8 +1861,8 @@ void wxPropertyGrid::OnPaint( wxPaintEvent& WXUNUSED(event) )
}
// Find out where the window is scrolled to
int vx,vy; // Top left corner of client
GetViewStart(&vx,&vy);
int vy; // Top of the client
GetViewStart(NULL, &vy);
vy *= wxPG_PIXELS_PER_UNIT;
// Update everything inside the box
@@ -1875,11 +1875,8 @@ void wxPropertyGrid::OnPaint( wxPaintEvent& WXUNUSED(event) )
r.x = 0;
r.width = GetClientSize().x;
r.y = vy;
r.height = GetClientSize().y;
// Repaint this rectangle
DrawItems(*dcPtr, r.y, r.y + r.height, &r);
DrawItems(*dcPtr, r.y, r.y + r.height-1, &r);
// This blits the buffer (if used) to the window DC.
delete dcPtr;
@@ -1985,7 +1982,7 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
{
tempItemsRect = wxRect(0, topItemY,
m_pState->GetVirtualWidth(),
bottomItemY);
bottomItemY - topItemY + 1);
itemsRect = &tempItemsRect;
}
@@ -1999,9 +1996,8 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
if ( m_pState->DoGetRoot()->GetChildCount() > 0 )
{
// paintFinishY and drawBottomY are in buffer/physical space
int paintFinishY = DoDrawItems(dc, itemsRect);
int drawBottomY = itemsRect->y + itemsRect->height - vy;
int paintFinishY = DoDrawItems(dc, itemsRect) + 1 - vy;
int drawBottomY = itemsRect->y + itemsRect->height - 1 - vy;
// Clear area beyond last painted property
if ( paintFinishY < drawBottomY )
@@ -2010,7 +2006,7 @@ void wxPropertyGrid::DrawItems( wxDC& dc,
dc.SetBrush(m_colEmptySpace);
dc.DrawRectangle(0, paintFinishY,
m_width,
drawBottomY );
drawBottomY-paintFinishY+1);
}
}
else
@@ -2047,10 +2043,14 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
if ( !lastItem )
lastItem = GetLastItem( wxPG_ITERATE_VISIBLE );
if ( IsFrozen() || m_height < 1 || firstItem == NULL )
return itemsRect->y;
int vy;
GetViewStart(NULL, &vy);
vy *= wxPG_PIXELS_PER_UNIT;
wxCHECK_MSG( !m_pState->m_itemsAdded, itemsRect->y,
if ( IsFrozen() || m_height < 1 || firstItem == NULL )
return vy - 1;
wxCHECK_MSG( !m_pState->m_itemsAdded, vy - 1,
wxS("no items added") );
wxASSERT( m_pState->DoGetRoot()->GetChildCount() );
@@ -2060,7 +2060,7 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
int lastItemBottomY;
firstItemTopY = itemsRect->y;
lastItemBottomY = itemsRect->y + itemsRect->height;
lastItemBottomY = itemsRect->y + itemsRect->height - 1;
// Align y coordinates to item boundaries
firstItemTopY -= firstItemTopY % lh;
@@ -2093,20 +2093,18 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
#if WXWIN_COMPATIBILITY_3_0
int xRelMod = 0;
// Buffer's y = 0, so align itemsRect and coordinates to that
if ( isBuffered )
{
xRelMod = itemsRect->x;
// itemsRect conversion
firstItemTopY -= itemsRect->y;
lastItemBottomY -= itemsRect->y;
firstItemTopY -= vy;
lastItemBottomY -= vy;
}
#else
// Buffer's y = 0, so align itemsRect and coordinates to that
int xRelMod = itemsRect->x;
// itemsRect conversion
firstItemTopY -= itemsRect->y;
lastItemBottomY -= itemsRect->y;
firstItemTopY -= vy;
lastItemBottomY -= vy;
#endif
int x = m_marginWidth - xRelMod;
@@ -2512,7 +2510,7 @@ int wxPropertyGrid::DoDrawItems( wxDC& dc,
y += rowHeight;
}
return y;
return y - 1 + vy;
}
// -----------------------------------------------------------------------
@@ -2580,6 +2578,7 @@ void wxPropertyGrid::DrawItems( const wxPGProperty* p1, const wxPGProperty* p2 )
r.x -= vx;
r.y -= vy;
RefreshRect(r);
Update();
}
}