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Codechange: Change scrolling_scrollbar to mouse_capture_widget, and dispatch OnClick() event if widget is not a scrollbar.

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This allows any widget to support mouse capture.
This commit is contained in:
Peter Nelson
2019-02-14 06:25:17 +00:00
committed by Charles Pigott
parent 66d23e3e86
commit de9f54ccc1
3 changed files with 55 additions and 36 deletions
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81
src/window.cpp
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@@ -1846,7 +1846,7 @@ void Window::InitNested(WindowNumber window_number)
* Empty constructor, initialization has been moved to #InitNested() called from the constructor of the derived class.
* @param desc The description of the window.
*/
Window::Window(WindowDesc *desc) : window_desc(desc), scrolling_scrollbar(-1)
Window::Window(WindowDesc *desc) : window_desc(desc), mouse_capture_widget(-1)
{
}
@@ -1934,7 +1934,7 @@ static void DecreaseWindowCounters()
NWidgetScrollbar *sb = static_cast<NWidgetScrollbar*>(nwid);
if (sb->disp_flags & (ND_SCROLLBAR_UP | ND_SCROLLBAR_DOWN)) {
sb->disp_flags &= ~(ND_SCROLLBAR_UP | ND_SCROLLBAR_DOWN);
w->scrolling_scrollbar = -1;
w->mouse_capture_widget = -1;
sb->SetDirty(w);
}
}
@@ -2386,47 +2386,66 @@ static void StartWindowSizing(Window *w, bool to_left)
}
/**
* handle scrollbar scrolling with the mouse.
* Handle scrollbar scrolling with the mouse.
* @param w window with active scrollbar.
*/
static void HandleScrollbarScrolling(Window *w)
{
int i;
NWidgetScrollbar *sb = w->GetWidget<NWidgetScrollbar>(w->mouse_capture_widget);
bool rtl = false;
if (sb->type == NWID_HSCROLLBAR) {
i = _cursor.pos.x - _cursorpos_drag_start.x;
rtl = _current_text_dir == TD_RTL;
} else {
i = _cursor.pos.y - _cursorpos_drag_start.y;
}
if (sb->disp_flags & ND_SCROLLBAR_BTN) {
if (_scroller_click_timeout == 1) {
_scroller_click_timeout = 3;
sb->UpdatePosition(rtl == HasBit(sb->disp_flags, NDB_SCROLLBAR_UP) ? 1 : -1);
w->SetDirty();
}
return;
}
/* Find the item we want to move to and make sure it's inside bounds. */
int pos = min(max(0, i + _scrollbar_start_pos) * sb->GetCount() / _scrollbar_size, max(0, sb->GetCount() - sb->GetCapacity()));
if (rtl) pos = max(0, sb->GetCount() - sb->GetCapacity() - pos);
if (pos != sb->GetPosition()) {
sb->SetPosition(pos);
w->SetDirty();
}
}
/**
* Handle active widget (mouse draggin on widget) with the mouse.
* @return State of handling the event.
*/
static EventState HandleScrollbarScrolling()
static EventState HandleActiveWidget()
{
Window *w;
FOR_ALL_WINDOWS_FROM_BACK(w) {
if (w->scrolling_scrollbar >= 0) {
if (w->mouse_capture_widget >= 0) {
/* Abort if no button is clicked any more. */
if (!_left_button_down) {
w->scrolling_scrollbar = -1;
w->mouse_capture_widget = -1;
w->SetDirty();
return ES_HANDLED;
}
int i;
NWidgetScrollbar *sb = w->GetWidget<NWidgetScrollbar>(w->scrolling_scrollbar);
bool rtl = false;
/* If cursor hasn't moved, there is nothing to do. */
if (_cursor.delta.x == 0 && _cursor.delta.y == 0) return ES_HANDLED;
if (sb->type == NWID_HSCROLLBAR) {
i = _cursor.pos.x - _cursorpos_drag_start.x;
rtl = _current_text_dir == TD_RTL;
/* Handle scrollbar internally, or dispatch click event */
WidgetType type = w->GetWidget<NWidgetBase>(w->mouse_capture_widget)->type;
if (type == NWID_VSCROLLBAR || type == NWID_HSCROLLBAR) {
HandleScrollbarScrolling(w);
} else {
i = _cursor.pos.y - _cursorpos_drag_start.y;
}
if (sb->disp_flags & ND_SCROLLBAR_BTN) {
if (_scroller_click_timeout == 1) {
_scroller_click_timeout = 3;
sb->UpdatePosition(rtl == HasBit(sb->disp_flags, NDB_SCROLLBAR_UP) ? 1 : -1);
w->SetDirty();
}
return ES_HANDLED;
}
/* Find the item we want to move to and make sure it's inside bounds. */
int pos = min(max(0, i + _scrollbar_start_pos) * sb->GetCount() / _scrollbar_size, max(0, sb->GetCount() - sb->GetCapacity()));
if (rtl) pos = max(0, sb->GetCount() - sb->GetCapacity() - pos);
if (pos != sb->GetPosition()) {
sb->SetPosition(pos);
w->SetDirty();
Point pt = { _cursor.pos.x - w->left, _cursor.pos.y - w->top };
w->OnClick(pt, w->mouse_capture_widget, 0);
}
return ES_HANDLED;
}
@@ -2845,7 +2864,7 @@ static void MouseLoop(MouseClick click, int mousewheel)
if (VpHandlePlaceSizingDrag() == ES_HANDLED) return;
if (HandleMouseDragDrop() == ES_HANDLED) return;
if (HandleWindowDragging() == ES_HANDLED) return;
if (HandleScrollbarScrolling() == ES_HANDLED) return;
if (HandleActiveWidget() == ES_HANDLED) return;
if (HandleViewportScroll() == ES_HANDLED) return;
HandleMouseOver();