Duncan McIntyre / SimpleGUI

Foundation classes for a basic GUI implementing simple widgets and events

Dependents:   TouchScreenGUIDemo

Widgets/TextWidget.cpp@3:cb004f59b715, 2016-03-27 (annotated)

Committer:
duncanFrance
Date:
Sun Mar 27 14:41:31 2016 +0000
Revision:
3:cb004f59b715
Parent:
2:bb9183379488
Child:
4:27546fb8b670
Added FontRenderer

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 3:cb004f59b715 8 TextWidget::TextWidget(GraphicsDisplay* display) : Widget(display), _renderer(display) {}
duncanFrance 0:0a590815d51c 9
duncanFrance 1:48796b602c86 10 void TextWidget::setText(char* text)
duncanFrance 1:48796b602c86 11 {
duncanFrance 0:0a590815d51c 12 _text = text;
duncanFrance 0:0a590815d51c 13 }
duncanFrance 0:0a590815d51c 14
duncanFrance 2:bb9183379488 15 void TextWidget::setFont(Font* font)
duncanFrance 1:48796b602c86 16 {
duncanFrance 2:bb9183379488 17 _font = font;
duncanFrance 0:0a590815d51c 18 }
duncanFrance 0:0a590815d51c 19
duncanFrance 3:cb004f59b715 20
duncanFrance 3:cb004f59b715 21 void TextWidget::draw()
duncanFrance 3:cb004f59b715 22 {
duncanFrance 3:cb004f59b715 23 _renderer.clip(_x, _y, _width, _height);
duncanFrance 3:cb004f59b715 24
duncanFrance 3:cb004f59b715 25 char c;
duncanFrance 3:cb004f59b715 26 char *p = _text;
duncanFrance 3:cb004f59b715 27
duncanFrance 3:cb004f59b715 28 while(*p != NULL) {
duncanFrance 3:cb004f59b715 29 c = *p;
duncanFrance 3:cb004f59b715 30 p++;
duncanFrance 3:cb004f59b715 31 _renderer.putc(c, _font, _fg, _bg);
duncanFrance 3:cb004f59b715 32 }
duncanFrance 3:cb004f59b715 33
duncanFrance 3:cb004f59b715 34 _display->copy_to_lcd();
duncanFrance 3:cb004f59b715 35 }
duncanFrance 3:cb004f59b715 36
duncanFrance 3:cb004f59b715 37 /**
duncanFrance 1:48796b602c86 38 void TextWidget::draw()
duncanFrance 1:48796b602c86 39 {
duncanFrance 0:0a590815d51c 40
duncanFrance 0:0a590815d51c 41 int right = _x + _width; // right side of clipping window
duncanFrance 1:48796b602c86 42 int bottom = _y + _height; // bottom edge of clipping window
duncanFrance 0:0a590815d51c 43
duncanFrance 0:0a590815d51c 44 int _cx = _x;
duncanFrance 0:0a590815d51c 45 // Start drawing characters at top left
duncanFrance 1:48796b602c86 46 int _cy = _y;
duncanFrance 0:0a590815d51c 47
duncanFrance 0:0a590815d51c 48 char c;
duncanFrance 0:0a590815d51c 49 char *p = _text;
duncanFrance 1:48796b602c86 50
duncanFrance 0:0a590815d51c 51 _display->foreground(_fg);
duncanFrance 0:0a590815d51c 52 _display->background(_bg);
duncanFrance 2:bb9183379488 53 _display->set_font(_font->_font);
duncanFrance 1:48796b602c86 54
duncanFrance 1:48796b602c86 55
duncanFrance 1:48796b602c86 56 while(*p != NULL) {
duncanFrance 0:0a590815d51c 57 c = *p;
duncanFrance 0:0a590815d51c 58 p++;
duncanFrance 0:0a590815d51c 59 if(c=='\n') {
duncanFrance 2:bb9183379488 60 _cy = _cy + _font->_height;
duncanFrance 0:0a590815d51c 61 _cx = _x;
duncanFrance 0:0a590815d51c 62 } else {
duncanFrance 0:0a590815d51c 63 // Only draw the character if it is not clipped
duncanFrance 2:bb9183379488 64 if( (_cx+_font->_width) < right && (_cy +_font->_height) < bottom) {
duncanFrance 0:0a590815d51c 65 _display->character(_cx, _cy, c);
duncanFrance 2:bb9183379488 66 _cx += _font->widthOf(c);
duncanFrance 0:0a590815d51c 67 }
duncanFrance 0:0a590815d51c 68 }
duncanFrance 0:0a590815d51c 69 }
duncanFrance 0:0a590815d51c 70 }
duncanFrance 3:cb004f59b715 71 **/
duncanFrance 1:48796b602c86 72 bool TextWidget::isEventTarget(Event e)
duncanFrance 1:48796b602c86 73 {
duncanFrance 0:0a590815d51c 74 return e.screenX < (_x+_width) && _x <= e.screenX && e.screenY < (_y+_height) && _y <= e.screenY;
duncanFrance 0:0a590815d51c 75 }