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Only redraw the screen once every 50ms

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This commit is contained in:
Kovid Goyal 2016-10-20 13:00:44 +05:30
parent 275161e0da
commit 050cf22f24
1 changed files with 45 additions and 35 deletions
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24
kitty/term.py
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@ -58,6 +58,11 @@ class TerminalWidget(QWidget):
t.setSingleShot(True) t.setSingleShot(True)
t.setInterval(50) t.setInterval(50)
t.timeout.connect(self.do_layout) t.timeout.connect(self.do_layout)
self.debounce_update_timer = t = QTimer(self)
t.setSingleShot(True)
t.setInterval(50)
t.timeout.connect(self.do_update_screen)
self.pending_update = QRegion()
def apply_opts(self, opts): def apply_opts(self, opts):
self.opts = opts self.opts = opts
@ -100,8 +105,8 @@ class TerminalWidget(QWidget):
def update_screen(self, changes): def update_screen(self, changes):
self.cursor = changes['cursor'] or self.cursor self.cursor = changes['cursor'] or self.cursor
if changes['screen']: if changes['screen']:
self.update() self.pending_update += self.rect()
return else:
cell_positions, line_positions, cell_width, cell_height = self.cell_positions, self.line_positions, self.cell_width, self.cell_height cell_positions, line_positions, cell_width, cell_height = self.cell_positions, self.line_positions, self.cell_width, self.cell_height
old_x, old_y = self.last_drew_cursor_at old_x, old_y = self.last_drew_cursor_at
rects = [] rects = []
@ -123,22 +128,27 @@ class TerminalWidget(QWidget):
if not cursor_added and self.cursor.y == lnum and (start <= self.cursor.x <= stop): if not cursor_added and self.cursor.y == lnum and (start <= self.cursor.x <= stop):
cursor_added = True cursor_added = True
rects.sort(key=lambda r: (r.y(), r.x())) rects.sort(key=lambda r: (r.y(), r.x()))
reg = QRegion()
for r in rects: for r in rects:
reg += r self.pending_update += r
if not cursor_added: if not cursor_added:
try: try:
reg += QRect(cell_positions[self.cursor.x], line_positions[self.cursor.y], cell_width, cell_height) self.pending_update += QRect(cell_positions[self.cursor.x], line_positions[self.cursor.y], cell_width, cell_height)
except IndexError: except IndexError:
pass pass
if self.cursor.y == old_y and self.cursor.x == old_x: if self.cursor.y == old_y and self.cursor.x == old_x:
old_cursor_added = True old_cursor_added = True
if not old_cursor_added: if not old_cursor_added:
try: try:
reg += QRect(cell_positions[old_x], line_positions[old_y], cell_width, cell_height) self.pending_update += QRect(cell_positions[old_x], line_positions[old_y], cell_width, cell_height)
except IndexError: except IndexError:
pass pass
self.update(reg) if not self.debounce_update_timer.isActive():
self.debounce_update_timer.start()
def do_update_screen(self):
if not self.pending_update.isEmpty():
self.update(self.pending_update)
self.pending_update = QRegion()
def dirty_cells(self, region: QRegion) -> Iterator[Tuple[int]]: def dirty_cells(self, region: QRegion) -> Iterator[Tuple[int]]:
for rect in region.rects(): for rect in region.rects():