Duncan McIntyre / SimpleGUI

Foundation classes for a basic GUI implementing simple widgets and events

Dependents:   TouchScreenGUIDemo

Widgets/TextWidget.cpp@0:0a590815d51c, 2016-03-25 (annotated)

Committer:
duncanFrance
Date:
Fri Mar 25 13:47:04 2016 +0000
Revision:
0:0a590815d51c
Child:
1:48796b602c86
Added EventSource interface

Who changed what in which revision?

UserRevisionLine numberNew contents of line
duncanFrance 0:0a590815d51c 1 #include "TextWidget.h"
duncanFrance 0:0a590815d51c 2
duncanFrance 0:0a590815d51c 3 /**
duncanFrance 0:0a590815d51c 4 * A basic widget implementation which just draws some text.
duncanFrance 0:0a590815d51c 5 * If the text does not fit in the bounding-box it will be clipped
duncanFrance 0:0a590815d51c 6 **/
duncanFrance 0:0a590815d51c 7
duncanFrance 0:0a590815d51c 8 TextWidget::TextWidget(GraphicsDisplay* display) : Widget(display) {}
duncanFrance 0:0a590815d51c 9
duncanFrance 0:0a590815d51c 10 void TextWidget::setText(char* text) {
duncanFrance 0:0a590815d51c 11 _text = text;
duncanFrance 0:0a590815d51c 12 }
duncanFrance 0:0a590815d51c 13
duncanFrance 0:0a590815d51c 14 void TextWidget::setFont(unsigned char *font) {
duncanFrance 0:0a590815d51c 15 _font = font;
duncanFrance 0:0a590815d51c 16 _fw = _font[1];
duncanFrance 0:0a590815d51c 17 _fh = _font[2];
duncanFrance 0:0a590815d51c 18 }
duncanFrance 0:0a590815d51c 19
duncanFrance 0:0a590815d51c 20 void TextWidget::draw() {
duncanFrance 0:0a590815d51c 21
duncanFrance 0:0a590815d51c 22 int right = _x + _width; // right side of clipping window
duncanFrance 0:0a590815d51c 23
duncanFrance 0:0a590815d51c 24 int _cx = _x;
duncanFrance 0:0a590815d51c 25 // Start drawing characters at top left
duncanFrance 0:0a590815d51c 26 int _cy = _y + _height - _fh;
duncanFrance 0:0a590815d51c 27
duncanFrance 0:0a590815d51c 28 char c;
duncanFrance 0:0a590815d51c 29 char *p = _text;
duncanFrance 0:0a590815d51c 30
duncanFrance 0:0a590815d51c 31 _display->foreground(_fg);
duncanFrance 0:0a590815d51c 32 _display->background(_bg);
duncanFrance 0:0a590815d51c 33
duncanFrance 0:0a590815d51c 34 while(p != NULL) {
duncanFrance 0:0a590815d51c 35 c = *p;
duncanFrance 0:0a590815d51c 36 p++;
duncanFrance 0:0a590815d51c 37 if(c=='\n') {
duncanFrance 0:0a590815d51c 38 _cy = _cy - _fh;
duncanFrance 0:0a590815d51c 39 _cx = _x;
duncanFrance 0:0a590815d51c 40 } else {
duncanFrance 0:0a590815d51c 41 // Only draw the character if it is not clipped
duncanFrance 0:0a590815d51c 42 if( (_cx+_fw) < right && (_cy -_fh) > _y) {
duncanFrance 0:0a590815d51c 43 _display->character(_cx, _cy, c);
duncanFrance 0:0a590815d51c 44 _cx += _fw;
duncanFrance 0:0a590815d51c 45 _cy -= _fh;
duncanFrance 0:0a590815d51c 46 }
duncanFrance 0:0a590815d51c 47 }
duncanFrance 0:0a590815d51c 48 }
duncanFrance 0:0a590815d51c 49 }
duncanFrance 0:0a590815d51c 50
duncanFrance 0:0a590815d51c 51 bool TextWidget::isEventTarget(Event e) {
duncanFrance 0:0a590815d51c 52 return e.screenX < (_x+_width) && _x <= e.screenX && e.screenY < (_y+_height) && _y <= e.screenY;
duncanFrance 0:0a590815d51c 53 }