DFSDK Menu Example

/* Copyright 2012 Juan José Sánchez Ramírez

   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.

   Author Juan José Sánchez Ramírez
   Version 1.0
*/

#include "DragonFireSDK.h"
#include "Scroller.h"
#include "ScrollButton.h"

enum Screen
{
    SCREEN_1,
    SCREEN_2,
    SCREEN_3
};

Screen nCurrentScreen = SCREEN_1;

Scroller scroller1;
Scroller scroller2;
Scroller scroller3;

ScrollButton aScrollerButton[20];

int nContainer1;
int nContainer2;
int nContainer3;
int nGUIContainer;

int nFont;
int nHeaderFont;
int nHeaderFontH;
int nHeaderFontS;

// This function adds text with a 1px highlight and a 1px shadow
void HeaderTextAdd(int container, int x, int y, char* text)
{
    TextAdd(container, x, y-1, text, nHeaderFontS);
    TextAdd(container, x, y+1, text, nHeaderFontH);
    TextAdd(container, x, y,   text, nHeaderFont);
}

// This function moves a page left
void MoveLeft(Scroller &scroller)
{
    scroller.SetMinX(-320);
    scroller.SetMaxX(-320);
    scroller.SetActive(false);
}

// This function moves a page right
void MoveRight(Scroller &scroller)
{
    scroller.SetMinX(320);
    scroller.SetMaxX(320);
    scroller.SetActive(false);
}

// This function centers a page
void CenterPage(Scroller &scroller)
{
    scroller.SetMinX(0);
    scroller.SetMaxX(0);
    scroller.SetActive(true);
}

// This function refreshes the screen
void UpdateScreen()
{
    switch(nCurrentScreen)
    {
    case 0:
        CenterPage(scroller1);
        break;
    case 1:
        CenterPage(scroller2);
        break;
    case 2:
        CenterPage(scroller3);
        break;
    };
}

// This function will be called when a scroller button is pressed
int OnButton(int id)
{
    if (id == 201) // Button on page 3
    {
        ContainerSetx(nContainer2, 0);
        MoveRight(scroller2);
        MoveRight(scroller3);
        nCurrentScreen = SCREEN_1;
    }
    else if (id == 101) // Button on page 2
    {
        MoveLeft(scroller2);
        nCurrentScreen = SCREEN_3;
    }
    else // Buttons on page 1
    {
        MoveLeft(scroller1);
        nCurrentScreen = SCREEN_2;
    }

    UpdateScreen();

    return id;
}

// This function marks the beginning of program execution
void AppMain()
{
    nContainer1 = ContainerAdd(0, 0, 0);
    nContainer2 = ContainerAdd(0, 320, 0); // Container to the right
    nContainer3 = ContainerAdd(0, 320, 0); // Container to the right

    nGUIContainer = ContainerAdd(0, 0, 0);

    nFont = FontAdd("Helvetica", "Regular", 18, 0x333333);

    nHeaderFont = FontAdd("Helvetica", "Bold", 30, 0xFFFFFF);
    nHeaderFontS = FontAdd("Helvetica", "Bold", 30, 0x333333);
    nHeaderFontH = FontAdd("Helvetica", "Bold", 30, 0x999999);

    // Initiate scroller 320x1096, ID 0, horizontal scroll false
    scroller1.Init(nContainer1, 320, 1096, 0);
    scroller1.SetHorizontalScroll(false);

    // Populate container 1
    ViewAdd(nContainer1, "Images/Wood.png", 0, 0);
    HeaderTextAdd(nContainer1, 8, 76, "First Page");

    for (int i=0; i<20; i++)
    {
        char filename[100];
        StrCopy(filename, "Images/RoundedList");

        if (i == 0)
            StrAppend(filename, "Top");
        else if (i == 19)
            StrAppend(filename, "Bottom");

        aScrollerButton[i].Init(nContainer1, filename, 8, i*44+122, OnButton, i+1);

        char text[100];
        sprintf(text, "Button %d", i+1);

        TextAdd(nContainer1, 28, i*44+134, text, nFont);
    }

    // Initiate scroller 320x480, ID 100, horizontal scroll false, active false, min X 320, max X 320
    scroller2.Init(nContainer2, 320, 480, 100);
    scroller2.SetHorizontalScroll(false);
    scroller2.SetActive(false);
    scroller2.SetMinX(320);
    scroller2.SetMaxX(320);

    // Populate container 2
    ViewAdd(nContainer2, "Images/Wood.png", 0, 0);
    HeaderTextAdd(nContainer2, 8, 76, "Another Page");
    ButtonAdd(nContainer2, "Images/RoundedButton", 8, 122, OnButton, 101);
    TextAdd(nContainer2, 28, 134, "Next page", nFont);

    // Initiate scroller 320x480, ID 200, horizontal scroll false, active false, min X 320, max X 320
    scroller3.Init(nContainer3, 320, 480, 200);
    scroller3.SetHorizontalScroll(false);
    scroller3.SetActive(false);
    scroller3.SetMinX(320);
    scroller3.SetMaxX(320);

    // Populate container 3
    ViewAdd(nContainer3, "Images/Wood.png", 0, 0);
    HeaderTextAdd(nContainer3, 8, 76, "Last Page");
    ButtonAdd(nContainer3, "Images/RoundedButton", 8, 122, OnButton, 201);
    TextAdd(nContainer3, 28, 134, "Go back", nFont);

    // GUI elements
    ViewAdd(nGUIContainer, "Images/TopBar.png", 0, 0);
    ViewAdd(nGUIContainer, "Images/Navigator.png", 0, 20);
    ViewAdd(nGUIContainer, "Images/Toolbar.png", 0, 436);
}

// This function is called whenever the app terminates
void AppExit()
{

}

// This function is called 30 times per second
void OnTimer()
{
    scroller1.Update();
    scroller2.Update();
    scroller3.Update();

    for (int i=0; i<20; i++)
        aScrollerButton[i].Update();
}