%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2009-2013. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
-module(ex_gauge).
-behaviour(wx_object).
-include_lib("wx/include/wx.hrl").
-export([start/1, init/1, terminate/2, code_change/3,
handle_info/2, handle_call/3, handle_cast/2, handle_event/2]).
-record(gauge, {obj,
value,
timer,
range
}).
-record(state,
{
parent,
config,
normal_gauge,
undeterminate_gauge,
simulate_button,
simulate_undet_button
}).
-define(ID_START_STOP, 1).
-define(ID_START_STOP_UNDET, 2).
-define(SET_VALUE, 3).
-define(VERTICAL, 4).
start(Config) ->
wx_object:start_link(?MODULE, Config, []).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
init(Config) ->
wx:batch(fun() -> do_init(Config) end).
do_init(Config) ->
Parent = proplists:get_value(parent, Config),
Panel = wxPanel:new(Parent, []),
%% Setup sizers
MainSizer = wxBoxSizer:new(?wxVERTICAL),
AlignSizer = wxStaticBoxSizer:new(?wxVERTICAL, Panel,
[{label, "wxGauge"}]),
%% Create two horizontal gauges with range 0-100
Range = 100,
NormalGauge = wxGauge:new(Panel, 1, Range, [{size, {200, -1}},
{style, ?wxGA_HORIZONTAL}]),
UndetGauge = wxGauge:new(Panel, 2, Range, [{size, {200, -1}},
{style, ?wxGA_HORIZONTAL}]),
%% Add to sizers
wxSizer:add(AlignSizer, NormalGauge, [{flag, ?wxEXPAND}]),
wxSizer:add(AlignSizer, UndetGauge, [{flag, ?wxEXPAND}]),
{OptSizer, SimulateButton, SimulateUndetermButton}
= create_option_sizer(Panel),
wxSizer:add(MainSizer, AlignSizer, [{flag, ?wxEXPAND}]),
wxSizer:add(MainSizer, OptSizer, []),
wxWindow:connect(Panel, command_togglebutton_clicked),
wxWindow:connect(Panel, command_button_clicked),
wxPanel:setSizer(Panel, MainSizer),
{Panel, #state{parent=Panel, config=Config,
normal_gauge = #gauge{obj=NormalGauge, value = 0,
range = Range},
undeterminate_gauge = #gauge{obj=UndetGauge, value = 0,
range = Range},
simulate_button = SimulateButton,
simulate_undet_button = SimulateUndetermButton}}.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Callbacks handled as normal gen_server callbacks
handle_info(tick, State=#state{normal_gauge = Gauge=#gauge{obj = Obj,
value = Value,
timer = Timer,
range = Range},
simulate_button = Button}) ->
Timer2 =
if Value >= Range ->
wxToggleButton:setValue(Button, false),
wxToggleButton:setLabel(Button, "Simulate load"),
wxGauge:setValue(Obj, Range),
demo:format(State#state.config, "Simulation finished.\n", []),
Timer;
true ->
simulate_load(Obj, Value)
end,
{noreply, State#state{normal_gauge = Gauge#gauge{value = Value+5,
timer = Timer2}}};
handle_info(pulse, State=#state{undeterminate_gauge = Gauge=#gauge{obj = Obj}}) ->
wxGauge:pulse(Obj),
Timer = erlang:send_after(300, self(), pulse),
{noreply, State#state{undeterminate_gauge = Gauge#gauge{timer = Timer}}}.
handle_call(shutdown, _From, State=#state{parent=Panel}) ->
wxPanel:destroy(Panel),
{stop, normal, ok, State};
handle_call(Msg, _From, State) ->
demo:format(State#state.config,"Got Call ~p\n",[Msg]),
{reply,ok, State}.
handle_cast(Msg, State) ->
io:format("Got cast ~p~n",[Msg]),
{noreply,State}.
%% Async Events are handled in handle_event as in handle_info
handle_event(#wx{id = ?ID_START_STOP,
event = #wxCommand{type = command_togglebutton_clicked,
commandInt = Int}},
State = #state{normal_gauge = #gauge{obj=Gauge,
value = Value,
timer = Timer},
simulate_button = Button}) ->
case Int of
1 ->
wxToggleButton:setLabel(Button, "Stop simulation"),
simulate_load(Gauge, Value);
0 ->
erlang:cancel_timer(Timer),
wxToggleButton:setLabel(Button, "Simulate load"),
ok
end,
{noreply, State};
handle_event(#wx{id = ?ID_START_STOP_UNDET,
event = #wxCommand{type = command_togglebutton_clicked,
commandInt = Int}},
State = #state{undeterminate_gauge = G = #gauge{obj=Gauge,
timer = Timer},
simulate_undet_button = Button}) ->
Timer2 =
case Int of
1 ->
wxToggleButton:setLabel(Button, "Stop simulation"),
wxGauge:pulse(Gauge),
erlang:send_after(300, self(), pulse);
0 ->
wxToggleButton:setLabel(Button, "Simulate undeterminate load"),
reset(G),
undefined
end,
case Timer of
undefined -> ok;
_ -> erlang:cancel_timer(Timer)
end,
{noreply, State#state{undeterminate_gauge = G#gauge{timer = Timer2}}};
handle_event(#wx{id = ?wxID_CLEAR,
event = #wxCommand{type = command_button_clicked}},
State = #state{normal_gauge = Gauge,
undeterminate_gauge = Gauge2}) ->
reset(Gauge),
reset(Gauge2),
{noreply, State#state{normal_gauge = Gauge#gauge{value = 0}}};
handle_event(Ev = #wx{}, State = #state{}) ->
demo:format(State#state.config,"Got Event ~p\n",[Ev]),
{noreply, State}.
code_change(_, _, State) ->
{stop, ignore, State}.
terminate(_Reason, _State) ->
ok.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Local functions
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
simulate_load(Gauge, Value) ->
wxGauge:setValue(Gauge, Value),
erlang:send_after(300, self(), tick).
reset(#gauge{obj = Gauge}) ->
wxGauge:setValue(Gauge, 0).
create_option_sizer(Panel) ->
OptSizer = wxStaticBoxSizer:new(?wxVERTICAL, Panel,
[{label, "Options"}]),
SimulateButton = wxToggleButton:new(Panel, ?ID_START_STOP, "Simulate load",
[{size, {200, 35}}]),
SimulateUndetermButton = wxToggleButton:new(Panel, ?ID_START_STOP_UNDET,
"Simulate Undeterminate load",
[{size, {200, 35}}]),
ClearButton = wxButton:new(Panel, ?wxID_CLEAR,
[{size, {200, 35}}]),
wxSizer:add(OptSizer, SimulateButton),
wxSizer:add(OptSizer, SimulateUndetermButton),
wxSizer:add(OptSizer, ClearButton),
wxWindow:connect(Panel, command_checkbox_clicked),
{OptSizer, SimulateButton, SimulateUndetermButton}.
