X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=demo_prior;a=blobdiff_plain;f=src%2Fimtk%2Fslider.c;fp=src%2Fimtk%2Fslider.c;h=6c50d03cc54ff5df94711650662a492093869211;hp=0000000000000000000000000000000000000000;hb=2f14a35e7d557da12f24056267b911f24774aa18;hpb=5eefe7b94c8d6c6caa2c10e3835ab0831a3c42a1

diff --git a/src/imtk/slider.c b/src/imtk/slider.c
new file mode 100644
index 0000000..6c50d03
--- /dev/null
+++ b/src/imtk/slider.c
@@ -0,0 +1,110 @@
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+#include "imtk.h"
+#include "state.h"
+#include "draw.h"
+
+#define SLIDER_SIZE		100
+#define THUMB_WIDTH		10
+#define THUMB_HEIGHT	20
+
+static int draw_slider(int id, float pos, float min, float max, int x, int y, int over);
+
+float imtk_slider(int id, float pos, float min, float max, int x, int y)
+{
+	int mousex, mousey, thumb_x, thumb_y, txsz, over = 0;
+	float range = max - min;
+
+	assert(id >= 0);
+
+	if(x == IMTK_AUTO || y == IMTK_AUTO) {
+		imtk_layout_get_pos(&x, &y);
+	}
+	y += THUMB_HEIGHT / 2;
+
+	imtk_get_mouse(&mousex, &mousey);
+
+	pos = (pos - min) / range;
+	if(pos < 0.0) pos = 0.0;
+	if(pos > 1.0) pos = 1.0;
+
+	thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
+	thumb_y = y - THUMB_HEIGHT / 2;
+
+	if(imtk_hit_test(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT)) {
+		imtk_set_hot(id);
+		over = 1;
+	}
+
+	if(imtk_button_state(IMTK_LEFT_BUTTON)) {
+		if(over && imtk_is_hot(id)) {
+			if(!imtk_is_active(id)) {
+				imtk_set_prev_mouse(mousex, mousey);
+			}
+			imtk_set_active(id);
+		}
+	} else {
+		if(imtk_is_active(id)) {
+			imtk_set_active(-1);
+		}
+	}
+
+	if(imtk_is_active(id)) {
+		int prevx;
+		float dx;
+
+		imtk_get_prev_mouse(&prevx, 0);
+
+		dx = (float)(mousex - prevx) / (float)SLIDER_SIZE;
+		pos += dx;
+		imtk_set_prev_mouse(mousex, mousey);
+
+		if(pos < 0.0) pos = 0.0;
+		if(pos > 1.0) pos = 1.0;
+	}
+
+	txsz = draw_slider(id, pos, min, max, x, y, over);
+	imtk_layout_advance(SLIDER_SIZE + THUMB_WIDTH + txsz, THUMB_HEIGHT);
+	return pos * range + min;
+}
+
+
+static int draw_slider(int id, float pos, float min, float max, int x, int y, int over)
+{
+	float range = max - min;
+	int thumb_x, thumb_y;
+	char buf[32];
+	float tcol[4], bcol[4];
+	unsigned int attr = 0;
+
+	thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
+	thumb_y = y - THUMB_HEIGHT / 2;
+
+	memcpy(tcol, imtk_get_color(IMTK_BOTTOM_COLOR), sizeof tcol);
+	memcpy(bcol, imtk_get_color(IMTK_TOP_COLOR), sizeof bcol);
+
+	/* draw trough */
+	imtk_draw_rect(x, y - 2, SLIDER_SIZE, 5, tcol, bcol);
+	imtk_draw_frame(x, y - 2, SLIDER_SIZE, 5, FRAME_INSET);
+
+	if(over) {
+		attr |= IMTK_FOCUS_BIT;
+	}
+	if(imtk_is_active(id)) {
+		attr |= IMTK_PRESS_BIT;
+	}
+	memcpy(tcol, imtk_get_color(IMTK_TOP_COLOR | attr), sizeof tcol);
+	memcpy(bcol, imtk_get_color(IMTK_BOTTOM_COLOR | attr), sizeof bcol);
+
+	/* draw handle */
+	imtk_draw_rect(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, tcol, bcol);
+	imtk_draw_frame(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, FRAME_OUTSET);
+
+	/* draw display */
+	sprintf(buf, "%.3f", pos * range + min);
+	glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
+	imtk_draw_string(x + SLIDER_SIZE + THUMB_WIDTH / 2 + 2, y + 4, buf);
+	return imtk_string_size(buf);
+}
+