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refactor scroll

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This commit is contained in:
Jinhao
2018-12-05 06:36:40 +08:00
parent ab2d39397f
commit f4c71db98b
2 changed files with 123 additions and 135 deletions
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125
include/nana/gui/widgets/scroll.hpp
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@@ -67,30 +67,30 @@ namespace nana
class drawer
{
public:
struct states
enum class states
{
enum{ none, highlight, actived, selected };
none, highlight, actived, selected
};
using graph_reference = paint::graphics&;
const static unsigned fixedsize = 16; // make it part of a new "metric" in the widget_scheme
drawer(metrics_type& m);
void set_vertical(bool);
drawer(bool vert);
buttons what(graph_reference, const point&);
void scroll_delta_pos(graph_reference, int);
void auto_scroll();
void draw(graph_reference, buttons);
void draw(graph_reference);
private:
bool _m_check() const;
void _m_adjust_scroll(graph_reference);
void _m_background(graph_reference);
void _m_button_frame(graph_reference, ::nana::rectangle, int state);
void _m_draw_scroll(graph_reference, int state);
void _m_draw_button(graph_reference, ::nana::rectangle, buttons what, int state);
private:
metrics_type &metrics_;
bool vertical_;
void _m_button_frame(graph_reference, ::nana::rectangle, states state);
void _m_draw_scroll(graph_reference, states state);
void _m_draw_button(graph_reference, ::nana::rectangle, buttons what, states state);
public:
metrics_type metrics;
bool const vert;
};
template<bool Vertical>
@@ -101,35 +101,34 @@ namespace nana
typedef metrics_type::size_type size_type;
trigger()
: graph_(nullptr), drawer_(metrics_)
: graph_(nullptr), drawer_(Vertical)
{
drawer_.set_vertical(Vertical);
}
const metrics_type& metrics() const
{
return metrics_;
return drawer_.metrics;
}
void peak(size_type s)
{
if (graph_ && (metrics_.peak != s))
if (graph_ && (drawer_.metrics.peak != s))
{
metrics_.peak = s;
drawer_.metrics.peak = s;
API::refresh_window(widget_->handle());
}
}
void value(size_type s)
{
if (metrics_.range > metrics_.peak)
if (drawer_.metrics.range > drawer_.metrics.peak)
s = 0;
else if (s + metrics_.range > metrics_.peak)
s = metrics_.peak - metrics_.range;
else if (s + drawer_.metrics.range > drawer_.metrics.peak)
s = drawer_.metrics.peak - drawer_.metrics.range;
if (graph_ && (metrics_.value != s))
if (graph_ && (drawer_.metrics.value != s))
{
metrics_.value = s;
drawer_.metrics.value = s;
_m_emit_value_changed();
API::refresh_window(*widget_);
@@ -138,16 +137,16 @@ namespace nana
void range(size_type s)
{
if (graph_ && (metrics_.range != s))
if (graph_ && (drawer_.metrics.range != s))
{
metrics_.range = s;
drawer_.metrics.range = s;
API::refresh_window(widget_->handle());
}
}
void step(size_type s)
{
metrics_.step = (s ? s : 1);
drawer_.metrics.step = (s ? s : 1);
}
bool make_step(bool forward, unsigned multiple)
@@ -155,12 +154,12 @@ namespace nana
if (!graph_)
return false;
size_type step = (multiple > 1 ? metrics_.step * multiple : metrics_.step);
size_type value = metrics_.value;
size_type step = (multiple > 1 ? drawer_.metrics.step * multiple : drawer_.metrics.step);
size_type value = drawer_.metrics.value;
if (forward)
{
size_type maxv = metrics_.peak - metrics_.range;
if (metrics_.peak > metrics_.range && value < maxv)
size_type maxv = drawer_.metrics.peak - drawer_.metrics.range;
if (drawer_.metrics.peak > drawer_.metrics.range && value < maxv)
{
if (maxv - value >= step)
value += step;
@@ -175,8 +174,8 @@ namespace nana
else
value = 0;
}
size_type cmpvalue = metrics_.value;
metrics_.value = value;
size_type cmpvalue = drawer_.metrics.value;
drawer_.metrics.value = value;
if (value != cmpvalue)
{
_m_emit_value_changed();
@@ -202,47 +201,42 @@ namespace nana
void refresh(graph_reference graph) override
{
drawer_.draw(graph, metrics_.what);
drawer_.draw(graph);
}
void resized(graph_reference graph, const ::nana::arg_resized&) override
{
drawer_.draw(graph, metrics_.what);
drawer_.draw(graph);
API::dev::lazy_refresh();
}
void mouse_enter(graph_reference graph, const ::nana::arg_mouse& arg) override
{
metrics_.what = drawer_.what(graph, arg.pos);
drawer_.draw(graph, metrics_.what);
drawer_.metrics.what = drawer_.what(graph, arg.pos);
drawer_.draw(graph);
API::dev::lazy_refresh();
}
void mouse_move(graph_reference graph, const ::nana::arg_mouse& arg) override
{
bool redraw = false;
if (metrics_.pressed && (metrics_.what == buttons::scroll))
if (drawer_.metrics.pressed && (drawer_.metrics.what == buttons::scroll))
{
size_type cmpvalue = metrics_.value;
size_type cmpvalue = drawer_.metrics.value;
drawer_.scroll_delta_pos(graph, (Vertical ? arg.pos.y : arg.pos.x));
if (cmpvalue != metrics_.value)
if (cmpvalue != drawer_.metrics.value)
_m_emit_value_changed();
redraw = true;
}
else
{
buttons what = drawer_.what(graph, arg.pos);
if (metrics_.what != what)
{
redraw = true;
metrics_.what = what;
}
}
if (redraw)
{
drawer_.draw(graph, metrics_.what);
API::dev::lazy_refresh();
if (drawer_.metrics.what == what)
return; //no change, don't redraw
drawer_.metrics.what = what;
}
drawer_.draw(graph);
API::dev::lazy_refresh();
}
void dbl_click(graph_reference graph, const arg_mouse& arg) override
@@ -254,33 +248,33 @@ namespace nana
{
if (arg.left_button)
{
metrics_.pressed = true;
metrics_.what = drawer_.what(graph, arg.pos);
switch (metrics_.what)
drawer_.metrics.pressed = true;
drawer_.metrics.what = drawer_.what(graph, arg.pos);
switch (drawer_.metrics.what)
{
case buttons::first:
case buttons::second:
make_step(metrics_.what == buttons::second, 1);
make_step(drawer_.metrics.what == buttons::second, 1);
timer_.interval(1000);
timer_.start();
break;
case buttons::scroll:
widget_->set_capture(true);
metrics_.scroll_mouse_offset = (Vertical ? arg.pos.y : arg.pos.x) - metrics_.scroll_pos;
drawer_.metrics.scroll_mouse_offset = (Vertical ? arg.pos.y : arg.pos.x) - drawer_.metrics.scroll_pos;
break;
case buttons::forward:
case buttons::backward:
{
size_type cmpvalue = metrics_.value;
size_type cmpvalue = drawer_.metrics.value;
drawer_.auto_scroll();
if (cmpvalue != metrics_.value)
if (cmpvalue != drawer_.metrics.value)
_m_emit_value_changed();
}
break;
default: //Ignore buttons::none
break;
}
drawer_.draw(graph, metrics_.what);
drawer_.draw(graph);
API::dev::lazy_refresh();
}
}
@@ -291,18 +285,18 @@ namespace nana
widget_->release_capture();
metrics_.pressed = false;
metrics_.what = drawer_.what(graph, arg.pos);
drawer_.draw(graph, metrics_.what);
drawer_.metrics.pressed = false;
drawer_.metrics.what = drawer_.what(graph, arg.pos);
drawer_.draw(graph);
API::dev::lazy_refresh();
}
void mouse_leave(graph_reference graph, const arg_mouse&) override
{
if (metrics_.pressed) return;
if (drawer_.metrics.pressed) return;
metrics_.what = buttons::none;
drawer_.draw(graph, buttons::none);
drawer_.metrics.what = buttons::none;
drawer_.draw(graph);
API::dev::lazy_refresh();
}
@@ -310,7 +304,7 @@ namespace nana
{
if (make_step(arg.upwards == false, 3))
{
drawer_.draw(graph, metrics_.what);
drawer_.draw(graph);
API::dev::lazy_refresh();
}
}
@@ -322,14 +316,13 @@ namespace nana
void _m_tick()
{
make_step(metrics_.what == buttons::second, 1);
make_step(drawer_.metrics.what == buttons::second, 1);
API::refresh_window(widget_->handle());
timer_.interval(100);
}
private:
::nana::scroll<Vertical> * widget_;
nana::paint::graphics * graph_;
metrics_type metrics_;
drawer drawer_;
timer timer_;
};