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Code Issues Activity Actions

WindowServer+LibGUI: Handle mouse wheel deltas in the mouse event stream.

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The wheel events will end up in GWidget::mousewheel_event(GMouseEvent&)
on the client-side. This patch also implements basic wheel scrolling in
GScrollableWidget via this mechanism. :^)
This commit is contained in:
Andreas Kling 2019-05-13 19:52:57 +02:00
parent dae8eb6454
commit dab9901235
13 changed files with 58 additions and 25 deletions
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7
LibGUI/GEvent.h
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@ -19,6 +19,7 @@ public:
MouseMove,
MouseDown,
MouseUp,
MouseWheel,
Enter,
Leave,
KeyDown,
@ -44,7 +45,6 @@ public:
explicit GEvent(Type type) : CEvent(type) { }
virtual ~GEvent() { }
bool is_mouse_event() const { return type() == MouseMove || type() == MouseDown || type() == MouseUp; }
bool is_key_event() const { return type() == KeyUp || type() == KeyDown; }
bool is_paint_event() const { return type() == Paint; }
};
@ -244,12 +244,13 @@ private:
class GMouseEvent final : public GEvent {
public:
GMouseEvent(Type type, const Point& position, unsigned buttons, GMouseButton button, unsigned modifiers)
GMouseEvent(Type type, const Point& position, unsigned buttons, GMouseButton button, unsigned modifiers, int wheel_delta)
: GEvent(type)
, m_position(position)
, m_buttons(buttons)
, m_button(button)
, m_modifiers(modifiers)
, m_wheel_delta(wheel_delta)
{
}
@ -259,10 +260,12 @@ public:
GMouseButton button() const { return m_button; }
unsigned buttons() const { return m_buttons; }
unsigned modifiers() const { return m_modifiers; }
int wheel_delta() const { return m_wheel_delta; }
private:
Point m_position;
unsigned m_buttons { 0 };
GMouseButton m_button { GMouseButton::None };
unsigned m_modifiers { 0 };
int m_wheel_delta { 0 };
};