[Scilab-users] Refresh plot from Slider

[tanthiamhuat]

Hi CL,

thanks for pointing out my mistake of using the text handles.

even if I add in the code:
if ~isempty(handles.Axes1.children)
delete(handles.Axes1.children);
I see that the previous plot is not deleted, why?

Secondly, is the slider able to display its value when it is slide along? If
yes, that would be wonderful.
Do we need to add in another text to display the slider value?

Below are the full code:

// This GUI file is generated by guibuilder version 3.0
//////////
f=figure('figure_position',[564,97],'figure_size',[656,665],'auto_resize','on','background',[33],'figure_name','Graphic
window number %d');
//////////
delmenu(f.figure_id,gettext('File'))
delmenu(f.figure_id,gettext('?'))
delmenu(f.figure_id,gettext('Tools'))
toolbar(f.figure_id,'off')
handles.dummy = 0;
handles.sliderAmp=uicontrol(f,'unit','normalized','BackgroundColor',[-1,-1,-1],'Enable','on','FontAngle','normal','FontName','Tahoma','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[-1,-1,-1],'HorizontalAlignment','left','ListboxTop',[],'Max',[100],'Min',[0],'Position',[0.0984375,0.7583333,0.2421875,0.0583333],'Relief','flat','SliderStep',[10,10],'String','1','Style','slider','Value',[33.45],'VerticalAlignment','middle','Visible','on','Tag','sliderAmp','Callback','sliderAmp_callback(handles)')
handles.sliderFreq=uicontrol(f,'unit','normalized','BackgroundColor',[-1,-1,-1],'Enable','on','FontAngle','normal','FontName','Tahoma','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[-1,-1,-1],'HorizontalAlignment','left','ListboxTop',[],'Max',[100],'Min',[0],'Position',[0.0984375,0.5854167,0.2421875,0.0583333],'Relief','default','SliderStep',[0.01,0.1],'String','1','Style','slider','Value',[22.76],'VerticalAlignment','middle','Visible','on','Tag','sliderFreq','Callback','sliderFreq_callback(handles)')
handles.editTime=uicontrol(f,'unit','normalized','BackgroundColor',[-1,-1,-1],'Enable','on','FontAngle','normal','FontName','Tahoma','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[-1,-1,-1],'HorizontalAlignment','center','ListboxTop',[],'Max',[1],'Min',[0],'Position',[0.0984375,0.4291667,0.1175,0.0583333],'Relief','default','SliderStep',[0.01,0.1],'String','0:0.9:10','Style','edit','Value',[0],'VerticalAlignment','middle','Visible','on','Tag','editTime','Callback','')
handles.pbPlot=uicontrol(f,'unit','normalized','BackgroundColor',[-1,-1,-1],'Enable','on','FontAngle','normal','FontName','Tahoma','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[-1,-1,-1],'HorizontalAlignment','center','ListboxTop',[],'Max',[1],'Min',[0],'Position',[0.0984375,0.2645833,0.1121875,0.0583333],'Relief','default','SliderStep',[0.01,0.1],'String','Plot','Style','pushbutton','Value',[0],'VerticalAlignment','middle','Visible','on','Tag','pbPlot','Callback','pbPlot_callback(handles)')
handles.Axes1= newaxes();handles.Axes1.margins = [ 0 0 0
0];handles.Axes1.axes_bounds = [0.415625,0.0770833,0.534375,0.725];
handles.Amp=uicontrol(f,'unit','normalized','BackgroundColor',[-1,-1,-1],'Enable','on','FontAngle','normal','FontName','Tahoma','FontSize',[12],'FontUnits','points','FontWeight','normal','ForegroundColor',[-1,-1,-1],'HorizontalAlignment','left','ListboxTop',[],'Max',[1],'Min',[0],'Position',[0.1653125,0.702766,0.094375,0.0425532],'Relief','default','SliderStep',[0.01,0.1],'String','Amplitude','Style','text','Value',[0],'VerticalAlignment','middle','Visible','on','Tag','Amp','Callback','')


//////////
// Callbacks are defined as below. Please do not delete the comments as it
will be used in coming version
//////////



function sliderAmp_callback(handles)
//Write your callback for  sliderAmp  here

endfunction


function sliderFreq_callback(handles)
//Write your callback for  sliderFreq  here

endfunction


function pbPlot_callback(handles)
//Write your callback for  pbPlot  here
funcprot(0)
amp = get(handles.sliderAmp,'value');
frq = get(handles.sliderFreq,'value');
t= evstr(get(handles.editTime,'String'));
y=amp.*sin(2*%pi*frq.*t);
if ~isempty(handles.Axes1.children)
delete(handles.Axes1.children);
plot(t,y); xgrid();
endfunction



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