Introducing Zinzala - page 3
We will modify the constructor of our class cCalcWindow as follows:
01 cCalcWindow::cCalcWindow()
02 : cWindow(uRect(250,100),"calc",eWinNormal,
03 0,
04 kCurrentWorkspace)
05 {
06 cGroupView *lFrame;
07 cFloatEntryView *lDistance;
08 cFloatEntryView *lWeight;
09 cComboBoxView *lDistanceUnit;
10 cComboBoxView *lWeightUnit;
11 cStringView *lResult;
12
13 // Set some settings of the window
14 SetTitle("Calorie burner Calculator");
15 MoveTo(10,10);
16
17 // Create widget to group all the widgets to put on the window
18 lFrame = new cGroupView(uRect(0,0),NULL,eHorizontal,0,
19 kFlgForceEqualSize | kFlgResizeToFit);
20 lFrame->SetSlicing(3);
21 lFrame->SetSpacing(5,5);
22
23 // Create and set widget to enter the distance
24 lDistance = new cFloatEntryView(uRect(60,20),NULL,0,NULL,0,kFlgUpDown);
25 lDistance->SetPrecision(1);
26
27 // Create and set widget to enter weight
28 lWeight = new cFloatEntryView(uRect(60,20),NULL,0,NULL,0,kFlgUpDown);
29 lWeight->SetPrecision(1);
30
31 // Create and set widget to select distance unit
32 lDistanceUnit = new cComboBoxView(uRect(60,20),NULL,NULL,0,kFlgNotEditable);
33
34 // Create and set widget to select weight unit
35 lWeightUnit = new cComboBoxView(uRect(60,20),NULL,NULL,0,kFlgNotEditable);
36
37 // Create and set widget to display the computation result
38 lResult = new cStringView(uRect(0,0),NULL,"a string",0,0);
39 lResult->SetFGColor(kColorBlue);
40 lResult->SetAlignment(eCenter);
41
42 // Add all the widget to the group
43 lFrame->AddChild(new cStringView(uRect(0,0),NULL,"Distance run",0,0));
44 lFrame->AddChild(lDistance);
45 lFrame->AddChild(lDistanceUnit);
46 lFrame->AddChild(new cStringView(uRect(0,0),NULL,"Weight",0,0));
47 lFrame->AddChild(lWeight);
48 lFrame->AddChild(lWeightUnit);
49 lFrame->AddChild(new cButtonView(uRect(0,0),NULL,"Compute",NULL,0,0));
50 lFrame->AddChild(lResult);
51
52 // Add the group to the window
53 AddChild(lFrame);
54 }
The source code can be downloaded here. This result is shown below:
A couple of things can be done to improve the appearance and behavior of the application. First, specifying a size for the window is not always elegant. It is best to let the window decide on its own based on its contents. Secondly, for a simple application such as this calculator, we don't want the user to resize the window.
Implementing this can be easily done in the call to the cWindow constructor in the cCalcWindow constructor:
01 cCalcWindow::cCalcWindow()
02 : cWindow(uRect(0,0),"calc",eWinNormal,
03 kFlgResizeToFit | kFlgNotResizable | kFlgNotZoomable,
04 kCurrentWorkspace)
05 {
06 cGroupView *lFrame;
07 cFloatEntryView *lDistance;
08 cFloatEntryView *lWeight;
09 cComboBoxView *lDistanceUnit;
10 cComboBoxView *lWeightUnit;
11 cStringView *lResult;
12
13 // Set some settings of the window
14 SetPadding(5,5);
15 SetTitle("Calorie burner Calculator");
16 MoveTo(10,10);
17
18 // Create widget to group all the widgets to put on the window
19 lFrame = new cGroupView(uRect(0,0),NULL,eHorizontal,0,
20 kFlgForceEqualSize | kFlgResizeToFit);
21 lFrame->SetSlicing(3);
22 lFrame->SetSpacing(5,5);
23
24 // Create and set widget to enter the distance
25 lDistance = new cFloatEntryView(uRect(60,20),NULL,0,NULL,0,kFlgUpDown);
26 lDistance->SetPrecision(1);
27
28 // Create and set widget to enter weight
29 lWeight = new cFloatEntryView(uRect(60,20),NULL,0,NULL,0,kFlgUpDown);
30 lWeight->SetPrecision(1);
31
32 // Create and set widget to select distance unit
33 lDistanceUnit = new cComboBoxView(uRect(60,20),NULL,NULL,0,kFlgNotEditable);
34
35 // Create and set widget to select weight unit
36 lWeightUnit = new cComboBoxView(uRect(60,20),NULL,NULL,0,kFlgNotEditable);
37
38 // Create and set widget to display the computation result
39 lResult = new cStringView(uRect(0,0),NULL,"a string",0,0);
40 lResult->SetFGColor(kColorBlue);
41 lResult->SetAlignment(eCenter);
42
43 // Add all the widget to the group
44 lFrame->AddChild(new cStringView(uRect(0,0),NULL,"Distance run",0,0));
45 lFrame->AddChild(lDistance);
46 lFrame->AddChild(lDistanceUnit);
47 lFrame->AddChild(new cStringView(uRect(0,0),NULL,"Weight",0,0));
48 lFrame->AddChild(lWeight);
49 lFrame->AddChild(lWeightUnit);
50 lFrame->AddChild(new cButtonView(uRect(0,0),NULL,"Compute",NULL,0,0));
51 lFrame->AddChild(lResult);
52
53 // Add the group to the window
54 AddChild(lFrame);
55 }