Added example of a calculator app with custom input box (#310)
Turned my previous pull request into an example, as you suggested.
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@ -348,6 +348,7 @@ endif
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EXAMPLES = \
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controls_test_suite/controls_test_suite \
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custom_file_dialog/custom_file_dialog \
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custom_input_box/custom_input_box\
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image_exporter/image_exporter \
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image_importer_raw/image_importer_raw \
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property_list/property_list \
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260
examples/custom_input_box/custom_input_box.c
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260
examples/custom_input_box/custom_input_box.c
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@ -0,0 +1,260 @@
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/*******************************************************************************************
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*
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* raygui - basic calculator app with custom input box for float values
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*
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* DEPENDENCIES:
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* raylib 4.5 - Windowing/input management and drawing.
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* raygui 3.5 - Immediate-mode GUI controls.
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*
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* COMPILATION (Windows - MinGW):
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* gcc -o $(NAME_PART).exe $(FILE_NAME) -I../../src -lraylib -lopengl32 -lgdi32 -std=c99
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*
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**********************************************************************************************/
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#include <raylib.h>
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#define RAYGUI_IMPLEMENTATION
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#include <raygui.h>
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int guiFloatingPointIndex = 0; // Global variable shared by all GuiFLoatBox()
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float TextToFloat(const char* text); // Helper function that converts text to float
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int GuiFloatBox(Rectangle bounds, const char* text, float* value, int minValue, int maxValue, bool editMode); // Custom input box that works with float values. Basicly GuiValueBox(), but with some changes
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int main()
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{
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InitWindow(250, 100, "Basic calculator");
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// General variables
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SetTargetFPS(60);
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float variableA = 0.0f;
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float variableB = 0.0f;
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float result = 0.0f;
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char operation[2];
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operation[0] = '+';
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operation[1] = '\0';
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bool variableAMode = false;
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bool variableBMode = false;
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//--------------------------------------------------------------------------------------
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// Main game loop
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while (!WindowShouldClose())
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{
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(RAYWHITE);
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if (GuiFloatBox((Rectangle){ 10, 10, 100, 20 }, NULL, &variableA, -1000000.0, 1000000.0, variableAMode)) variableAMode = !variableAMode;
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if (GuiFloatBox((Rectangle){ 140, 10, 100, 20 }, NULL, &variableB, -1000000.0, 1000000.0, variableBMode)) variableBMode = !variableBMode;
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if (GuiButton((Rectangle){ 10, 70, 50, 20 }, "+"))
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{
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result = variableA + variableB;
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operation[0] = '+';
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}
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if (GuiButton((Rectangle){ 70, 70, 50, 20 }, "-"))
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{
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result = variableA - variableB;
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operation[0] = '-';
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}
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if (GuiButton((Rectangle){ 130, 70, 50, 20 }, "*"))
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{
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result = variableA * variableB;
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operation[0] = '*';
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}
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if (GuiButton((Rectangle){ 190, 70, 50, 20 }, "/"))
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{
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result = variableA / variableB;
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operation[0] = '/';
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}
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DrawText(operation, 123, 15, 10, DARKGRAY);
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GuiFloatBox((Rectangle){ 55, 40, 135, 20 }, "= ", &result, -2000000.0, 2000000.0, false);
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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CloseWindow();
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}
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// Get float value from text
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float TextToFloat(const char* text)
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{
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float value = 0.0f;
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float floatingPoint = 0.0f;
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int sign = 1;
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// deal with the sign
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if ((text[0] == '+') || (text[0] == '-'))
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{
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if (text[0] == '-') sign = -1;
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text++;
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}
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// convert text to float
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for (int i = 0; (((text[i] >= '0') && (text[i] <= '9')) || text[i] == '.'); i++)
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{
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if (text[i] == '.')
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{
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if (floatingPoint > 0.0f) break;
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floatingPoint = 10.0f;
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continue;
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}
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if (floatingPoint > 0.0f) // after encountering decimal separator
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{
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value += (float)(text[i] - '0') / floatingPoint;
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floatingPoint *= 10.0f;
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}
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else // before decimal separator
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value = value * 10.0f + (float)(text[i] - '0');
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}
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return value * sign;
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}
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// Float Box control, updates input text with numbers
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int GuiFloatBox(Rectangle bounds, const char* text, float* value, int minValue, int maxValue, bool editMode)
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{
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#if !defined(RAYGUI_VALUEBOX_MAX_CHARS)
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#define RAYGUI_VALUEBOX_MAX_CHARS 32
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#endif
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int result = 0;
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GuiState state = guiState;
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char textValue[RAYGUI_VALUEBOX_MAX_CHARS + 1] = "\0";
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Rectangle textBounds = { 0 };
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if (text != NULL)
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{
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textBounds.width = (float)GetTextWidth(text) + 2;
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textBounds.height = (float)GuiGetStyle(DEFAULT, TEXT_SIZE);
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textBounds.x = bounds.x + bounds.width + GuiGetStyle(VALUEBOX, TEXT_PADDING);
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textBounds.y = bounds.y + bounds.height / 2 - GuiGetStyle(DEFAULT, TEXT_SIZE) / 2;
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if (GuiGetStyle(VALUEBOX, TEXT_ALIGNMENT) == TEXT_ALIGN_LEFT) textBounds.x = bounds.x - textBounds.width - GuiGetStyle(VALUEBOX, TEXT_PADDING);
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}
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// Update control
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//--------------------------------------------------------------------
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if ((state != STATE_DISABLED) && !guiLocked && !guiSliderDragging)
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{
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Vector2 mousePoint = GetMousePosition();
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if (*value >= 0) sprintf(textValue, "+%.3f", *value);
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else sprintf(textValue, "%.3f", *value);
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bool valueHasChanged = false;
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int keyCount = (int)strlen(textValue) - guiFloatingPointIndex;
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if (editMode)
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{
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state = STATE_PRESSED;
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// Only allow keys in range [48..57]
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if (keyCount < RAYGUI_VALUEBOX_MAX_CHARS)
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{
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if (GetTextWidth(textValue) < bounds.width)
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{
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int key = GetCharPressed();
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if ((key >= 48) && (key <= 57) && guiFloatingPointIndex)
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{
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if (guiFloatingPointIndex && guiFloatingPointIndex != 4) guiFloatingPointIndex--;
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textValue[keyCount] = (char)key;
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textValue[++keyCount] = '\0';
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valueHasChanged = true;
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}
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}
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}
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// Delete text
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if (keyCount > 0)
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{
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if (IsKeyPressed(KEY_BACKSPACE))
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{
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if (guiFloatingPointIndex < 4) guiFloatingPointIndex++;
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keyCount--;
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textValue[keyCount] = '\0';
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valueHasChanged = true;
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}
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}
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// Change sign
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if (IsKeyPressed(KEY_MINUS))
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{
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if (textValue[0] == '+') textValue[0] = '-';
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else if (textValue[0] == '-') textValue[0] = '+';
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valueHasChanged = true;
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}
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// Add decimal separator
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if ((IsKeyPressed(KEY_COMMA) || IsKeyPressed(KEY_PERIOD)) && guiFloatingPointIndex == 4)
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{
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guiFloatingPointIndex--;
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valueHasChanged = true;
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}
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if (valueHasChanged)
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{
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*value = TextToFloat(textValue);
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}
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if (IsKeyPressed(KEY_ENTER) || (!CheckCollisionPointRec(mousePoint, bounds) && IsMouseButtonPressed(MOUSE_LEFT_BUTTON)))
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{
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guiFloatingPointIndex = 0;
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result = 1;
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}
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}
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else
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{
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if (*value > maxValue) *value = maxValue;
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else if (*value < minValue) *value = minValue;
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if (CheckCollisionPointRec(mousePoint, bounds))
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{
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state = STATE_FOCUSED;
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if (IsMouseButtonPressed(MOUSE_LEFT_BUTTON)) result = 1;
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}
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}
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}
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//--------------------------------------------------------------------
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// Draw control
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//--------------------------------------------------------------------
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Color baseColor = BLANK;
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sprintf(textValue, "%.3f", *value);
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if (state == STATE_PRESSED)
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{
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baseColor = GetColor(GuiGetStyle(VALUEBOX, BASE_COLOR_PRESSED));
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textValue[(int)strlen(textValue) - guiFloatingPointIndex] = '\0';
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}
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else if (state == STATE_DISABLED) baseColor = GetColor(GuiGetStyle(VALUEBOX, BASE_COLOR_DISABLED));
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// WARNING: BLANK color does not work properly with Fade()
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GuiDrawRectangle(bounds, GuiGetStyle(VALUEBOX, BORDER_WIDTH), Fade(GetColor(GuiGetStyle(VALUEBOX, BORDER + (state * 3))), guiAlpha), baseColor);
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GuiDrawText(textValue, GetTextBounds(VALUEBOX, bounds), TEXT_ALIGN_CENTER, Fade(GetColor(GuiGetStyle(VALUEBOX, TEXT + (state * 3))), guiAlpha));
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// Draw cursor
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if (editMode)
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{
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// NOTE: ValueBox internal text is always centered
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Rectangle cursor = { bounds.x + GetTextWidth(textValue) / 2 + bounds.width / 2 + 1, bounds.y + 2 * GuiGetStyle(VALUEBOX, BORDER_WIDTH), 4, bounds.height - 4 * GuiGetStyle(VALUEBOX, BORDER_WIDTH) };
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GuiDrawRectangle(cursor, 0, BLANK, Fade(GetColor(GuiGetStyle(VALUEBOX, BORDER_COLOR_PRESSED)), guiAlpha));
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}
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// Draw text label if provided
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GuiDrawText(text, textBounds, (GuiGetStyle(VALUEBOX, TEXT_ALIGNMENT) == TEXT_ALIGN_RIGHT) ? TEXT_ALIGN_LEFT : TEXT_ALIGN_RIGHT, Fade(GetColor(GuiGetStyle(LABEL, TEXT + (state * 3))), guiAlpha));
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//--------------------------------------------------------------------
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return result;
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}
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